How to read house flip property taxes before you count them twice

Written and reviewed by the Rehabfolio editorial team. Published and last reviewed October 14, 2026.

Who this guide is for. This guide is for United States residential investors buying a one-to-four-unit property they intend to renovate, then sell or hold. You are about to write an offer, or you are reading a settlement statement before you wire funds. The guide ends when you can point to one tax figure for the days you will own the house, one cash movement at each closing, and any later bill you are still reserving. The monthly carry that includes that tax lives in the holding cost guide. The full profit stack lives in the cost breakdown. The purchase day is the buyer closing checklist. The sale day is the seller closing checklist.

The Rehabfolio editorial team builds and reviews the deal sheet, the holding-cost calculator, and the property file those bills land in. That is first-hand product experience with a tax credit that gets entered as profit and then entered again as a cost. It does not make the team a tax adviser, assessor, title officer, attorney, or lender. We do not invent licenses, credentials, or customer results. Rehabfolio does not set a tax rate and does not file a return.

Tax years, due dates, exemptions, reassessment, and who must escrow differ by state, county, contract, and lender. This page is educational. It is not tax, legal, title, or investment advice. IRS Publication 530 is written for homeowners. A house you buy to renovate and resell can be inventory or another business asset, and the same bill can land in a different place on the return. A tax professional applies that to your facts. The cash still has to be on the deal sheet either way.

Tip: After you have one annual tax figure, test the hold in the holding cost calculator and the full offer in the flip analysis calculator. The maximum offer guide is the screen those dollars have to clear. This page is how you stop the tax line from showing up twice on that screen.

1. Decide what the tax line has to prove

Before you treat a tax number as finished, you should be able to prove four things from documents, not from the listing's last tax figure.

1. You know which bill you are looking at: the current year, a delinquent prior year, a special assessment, or a supplemental bill that has not been issued yet.
2. You know the tax year those dollars cover, and whether that year matches the calendar or a fiscal year that starts on another day.
3. You have split the current period at the purchase and, if you already have a sale date, at the sale. Each day of the period belongs to one party.
4. The holding line on the offer uses your days once. Closing credits are cash movements. They are not a second copy of the tax, and they are not profit.

The cost breakdown already says tax prorations can overlap the holding tax line, and that a first pass should let holding carry the months you own while seller closing carries the transactional fees. This page is the method for that overlap. It does not rebuild the whole profit stack, the insurance policy, or the utility account. Utilities are the utility transfer guide. If you keep the house as a rental, the monthly operating bucket is the holding costs versus operating expenses guide. A flip's tax during the rehab is carry. The same kind of bill after a tenant moves in is an operating expense. Do not put it in both budgets for the same month.

2. Separate the bill, the value, and the proration

Most state and local governments charge an annual tax on the value of real property. IRS Publication 530 (2025) calls that a real estate tax, and it says you can deduct it, if you are a homeowner who itemizes, when it is assessed uniformly at a like rate on all real property in the community and the proceeds are for general community or governmental purposes. The bill in your hand is value times rates, often split among a city, a county, a school district, and other units. The assessed value is not the tax. The rate is not the tax. The proration is not the bill.

Exemptions can make the seller's bill a poor forecast of yours. The Texas Comptroller says there is no state property tax in Texas. Tax is local, and all real property is taxable in proportion to appraised value unless the Texas Constitution authorizes an exemption. A general residence homestead requires an ownership interest and use as the owner's principal residence. The Comptroller states that Tax Code Section 11.13(b) requires school districts to provide a $140,000 exemption on a residence homestead. Its example: a home appraised at $300,000 with that exemption is taxed by the school district as if it were worth $160,000. Taxing units may also offer a local option exemption of up to 20 percent, not less than $5,000 when they adopt it.

That $140,000 figure is the Comptroller's statement of the school exemption. It is not a bill. If you need a dollar, ask the appraisal district for an estimate without the seller's exemptions, using the rates that actually apply. A teaching rate, not a district quote, shows why the ask matters. At $1.00 of school tax per $100 of taxable value, the Comptroller's $300,000 example produces $1,600 of school tax with the $140,000 exemption and $3,000 without it. The $1,400 gap is the school portion only, before city and county. Do not file a homestead exemption on a house you are renovating to sell. The exemption is for a principal residence. A flip that is not your residence does not qualify just because the seller qualified.

Charges on the bill that are not the holding tax

Publication 530 lists items you cannot deduct as real estate taxes. They can still be cash. They do not belong inside the annual property-tax field as if they were the same charge.

• Service fees. A unit fee for water, a flat fee for trash, or a charge for mowing a lot the ordinance says is too tall is not a real estate tax, even when a government sends the bill. Trash and water belong with utilities.
• Assessments for local benefits. Amounts you pay for benefits that tend to increase value, such as new streets, sidewalks, or water and sewer systems, are not deductible as taxes. Publication 530 says to add them to the basis of the property. Maintenance or repair of an existing benefit, and interest in that charge, can be deductible if you can show the amount. On a flip, a new-sidewalk assessment is still cash. Put the recorded amount on its own acquisition line.
• Transfer taxes. Publication 530 says you cannot deduct transfer taxes on the sale of a personal home. A buyer who pays them includes them in cost basis. A seller who pays them treats them as an expense of the sale. On the flip stack they are buying costs or selling costs, which is where the cost breakdown already puts seller transfer taxes.
• Homeowners' association assessments. The association imposes them, not the state or local government. They are not property tax. The holding-cost calculator has a separate association field.

Delinquent taxes are a prior year, not this year's proration. Publication 530 says delinquent taxes are unpaid taxes imposed on the seller for an earlier tax year. If you agree to pay them when you buy, you cannot deduct them. You treat them as part of the cost of the home. Title usually wants that lien paid at closing. If the payoff is on you, it is an acquisition cost. It is not a reason to inflate the monthly tax estimate for the months you will own the house.

3. Read one bill before you use it

Read the bill in a fixed order. Stop when a line is missing. An online "tax estimate" on a listing is not a bill.

1. Parcel or account number, and the situs address. Match both to the contract. A neighbor's parcel on a listing screenshot is a different tax.
2. Tax year or fiscal year the bill covers, and the due date and delinquency date printed on that bill.
3. Appraised or assessed value, then each exemption, then taxable value. Write down whose exemption it is.
4. Each taxing unit and its rate. The total tax is the sum of those lines, not a single rate you remember from another county.
5. What is already paid, what is delinquent, and any penalty, interest, or attorney fee. Those add-ons are part of the payoff. They are not part of next year's rate.
6. Special assessments and service fees sitting on the same page. Move them to the lines in the previous section.
7. Whether the bill is the annual bill, a supplemental bill, or a revised bill. A revised bill replaces the figure you prorated. It does not sit on top of it unless the collector says both are due.

In Texas, the Comptroller's paying page says that in most cases you must pay property taxes by January 31, and taxes that remain unpaid on February 1 are delinquent. If the bill is mailed after January 10, the delinquency date is postponed so you have at least 21 days. The postponed date is printed on the bill. Penalty and interest, on the Comptroller's description, start with a 6 percent penalty and 1 percent interest on February 1. The penalty rises by 1 percent a month until July 1, when the penalty becomes 12 percent. Interest continues at 1 percent a month with no maximum. Private attorneys hired to collect delinquent accounts can charge an additional penalty of up to 20 percent. The Comptroller's bills page states Tax Code Section 31.01(g): failure to send or receive the bill does not affect the validity of the tax. Read the certificate. Do not assume a quiet mailbox means a zero balance.

The due diligence checklist is the home for the whole inspection window. The tax certificate is one document in that window. Order it early enough that a delinquency can change the offer before you waive, not on the morning of closing.

4. Prorate the purchase, then prorate the sale

Publication 530 says real estate taxes are generally divided so that you and the seller each pay taxes for the part of the property tax year you owned the home. For federal income tax purposes, the seller is treated as paying the property taxes up to but not including the date of sale. The buyer is treated as paying the taxes beginning with the date of sale. This applies regardless of the lien dates under local law. The publication says this information is generally on the settlement statement. It also says each of you is considered to have paid your own share even if the other person paid the entire amount.

The publication's own example is a home purchase on September 1. The property tax year is the calendar year. The tax for the year was $730, paid by the seller on August 15. The buyer owned the home for 122 days, September 1 through December 31, including the purchase date. The buyer divides 122 by 365 to get 0.3342, then multiplies by $730. The deduction in the example is $244. The publication says the buyer can deduct $244 if they itemize, even if the contract did not require the buyer to reimburse the seller.

Calculation: 122 divided by 365 is 0.334246, which the publication rounds to 0.3342. Times $730 is $244. That arithmetic is the IRS example for a homeowner who itemizes. It is not a flip profit, and it is not permission to ignore a contract that splits the cash differently.

Two clocks sit on top of each other. The contract clock moves cash at closing: a credit if the seller owes you for days already passed, or a charge if the seller prepaid days you will own. The federal clock, for a homeowner using Publication 530, assigns the year's tax by the date of sale even when the check did not follow that split. Use the settlement statement to fund the closing. Give both the statement and the bill to your tax professional for the return. Do not subtract the federal deduction from the cash you still owe the county.

The 2025 publication also says the overall limit on the deduction for state and local income, sales, and property tax has increased to $40,000 ($20,000 if married filing separately), and it points readers to the Instructions for Schedule A. Check the instructions for the year you file. That limit is about the deduction. It does not reduce the collector's bill.

How a cash flip uses the same split

Many flips never receive a consumer Closing Disclosure because there is no consumer mortgage. The jobs on that form still exist on a settlement statement. When there is a loan covered by the form, the Consumer Financial Protection Bureau's Closing Disclosure puts property taxes in more than one place. The blank model form has a Prepaids line for property taxes, with the number of months, and an Initial Escrow Payment line for property taxes, with a per-month amount and a number of months. Page 1 also asks whether property taxes are in escrow. The Bureau's explainer says an escrow account lets you pay insurance and property taxes monthly instead of in a lump, and that you should ask what is included. Regulation Z section 1026.38 requires those prepaid and escrow amounts to be itemized.

A cash closing can still prorate. Match the credit or debit to the tax year on the certificate, count the days, and confirm the total of the parties' shares equals the bill you are splitting. If the shares do not add back to the bill, someone has the wrong year, the wrong day count, or a bill that was revised after the statement was drafted.

Publication 530's escrow rule is the double-count test. You may not be able to deduct the total you pay into escrow. You can deduct only the real estate taxes the lender actually paid from escrow to the taxing authority. On the deal sheet, the deposit is cash to close. The tax is the amount that will be paid to the collector for your ownership. Money left in escrow and returned at payoff is your cash coming back. It is not a second tax, and it is not profit you earned by renovating.

5. Reserve the bill the statement cannot show

Buying the house can change the taxable value. The purchase closing statement can only prorate bills that already exist, or estimates the title company is willing to use. A reassessment that is mailed later is still your cash if you own the property when it is assessed to you.

California is the clearest published example. The State Board of Equalization says the supplemental roll places a Proposition 13 reappraisal, from a change in ownership or completed new construction, into effect without waiting for the next annual roll. The assessor subtracts the prior assessed value from the new value. That difference is the net supplemental assessment. It can be positive or negative. A fiscal year runs from July 1 through June 30. The supplemental covers the period from the first day of the month after the event through the end of that fiscal year.

The Board's billing rule is mechanical. An event from June 1 through December 31 produces one supplemental bill or refund, for the rest of the current fiscal year. An event from January 1 through May 31 produces two: one for the rest of the current fiscal year, and one for the entire next fiscal year. A June event rolls to July 1, so there is no supplemental against the current roll and one supplemental for the full next fiscal year. The Board publishes monthly factors. October's factor, for a bill that becomes effective November 1, is 0.67. March's factor, for a bill effective April 1, is 0.25. The Board's own March illustration uses a $300,000 purchase, a $261,000 prior value, a $39,000 increase, and a 1.025 percent rate it labels as illustration only. The full-year increase in that illustration is $400. The first bill is $100. The second bill, for the entire next fiscal year, is $400.

Two sentences on that page matter more than the sample dollars. The supplemental bill is in addition to the annual bill. And a supplemental reduction does not reduce, and cannot be used as a credit toward, the amount still due on the existing annual bill. You can owe the old bill and the new difference at the same time. You do not get to skip the old bill because a later notice lowered the value.

Where the number goes in the calculators

The holding cost calculator asks for annual property tax. It divides that entry by 12, multiplies by the hold, and also spreads the same annual figure across 365 days when you test a delay. Its formula note says the daily figure is for scenario planning, and that material bills should still be calculated from their actual terms. Its warning says not to count tax, insurance, or principal twice when payments include escrow.

Enter the annual allocation in that field, not a share you have already prorated. If the annual bill is $3,650 and you will hold about six months, the tool charges about half of $3,650. If you type the $1,800 you already computed for those six months into the annual field, the tool charges half of $1,800 and the tax is too small. A supplemental bill or a delinquent payoff is a lump, not a new annual rate. Leave it out of the annual field. Add the dollars you will keep beside the calculator result. If you drop the whole supplemental into the annual field, a short hold will charge only a fraction of a bill that may be due in full until the sale statement prorates it.

The flip analysis calculator asks for one monthly holding amount: taxes, insurance, utilities, care, and other recurring ownership costs. Put the tax in that monthly number once. A six-month hold and $1,800 of tax is $300 a month of tax, plus the other carry. It is not $3,650 a month, and it is not an extra line for the credit you received at the purchase. The calculator does not estimate income tax. Neither does this guide.

6. Three buyers, three written decisions

These three buyers are original composites for teaching. The names, streets, prices, tax rates that are not quoted from a public example, and outcomes are illustrative. They are not case studies, testimonials, or quotes from a county. Each buyer writes the decision before they spend the tax reserve on finishes. The Texas penalty description and the California supplemental method are the public rules named above. The deals wrapped around them are not.

Dana Okonkwo, a ranch house in Arlington, Texas

Dana is buying a one-story ranch for $186,000. Her after-repair value is $310,000. Repairs are $52,000. Buying costs are 2 percent of the price, $3,720. Selling costs are 8 percent of the after-repair value, $24,800. Financing is $9,000. Insurance, utilities, and property care for the hold are $4,200, before tax. She plans to buy on March 1, 2026, and sell on August 28, 2026. Her walk-away profit is $25,000. She also wants a $4,000 finish upgrade that is not in the $52,000.

The tax certificate used at closing, a teaching figure, shows a 2026 calendar-year tax of $3,650. Exemptions do not change in this file, so the lesson is the proration, not a reassessment. 2026 is not a leap year. The original seller's days, January 1 through February 28, are 59. Dana's days, March 1 through August 27, are 180. The end buyer's days, August 28 through December 31, are 126. Those three counts add to 365. Under the Publication 530 split, Dana's ownership begins on her purchase date and ends the day before her sale date.

Calculation: 59 divided by 365, times $3,650, is $590. 180 divided by 365, times $3,650, is $1,800. 126 divided by 365, times $3,650, is $1,260. The three shares add back to $3,650. In Texas, that bill is generally due by January 31, 2027, which is after Dana has sold. The proration is how the parties fund a bill that is not paid on the day she buys.

Calculation: $310,000 minus $186,000 is $124,000. Minus $52,000 is $72,000. Minus $3,720 is $68,280. Minus $24,800 is $43,480. Minus $9,000 is $34,480. Minus $4,200 is $30,280. Minus $1,800 is $28,480. That is $3,480 above her $25,000 walk-away number.

Her first draft did two different wrong things with the same $3,650. One version put the entire bill in holding and ignored that $1,850 of it belongs to the other parties, so the deal looked tighter than it is. The other version treated the $590 purchase credit as if the seller had covered the taxes, dropped Dana's tax line to zero, and called the credit a reason to add the $4,000 upgrade. Profit with a zero tax line is $30,280. Minus $4,000 it is still $26,280, which clears $25,000 on that wrong sheet. The corrected sheet is $28,480 minus $4,000, which is $24,480. That misses the walk-away number.

Decision: Dana proceeds without the upgrade. She enters $3,650 as the annual property tax in the holding-cost calculator, not $1,800, because the tool divides the annual entry by 12. She puts $300 a month of tax inside the flip calculator's monthly holding number for a six-month hold ($1,800 divided by 6), on top of insurance, utilities, and care. She does not also add the $590 credit as profit. The credit is the original seller's 59 days. Those days were never her cost.

Priya Shah, a bungalow in Sacramento County

Priya is buying a bungalow for $450,000 on October 16, 2026. Her after-repair value is $640,000. Repairs are $55,000. Buying costs are 2 percent, $9,000. Selling costs are 8 percent of value, $51,200. Financing is $10,000. She budgeted $8,000 of holding cost, and $825 of that $8,000 was tax. She plans to sell on March 16, 2027. Her walk-away profit is $40,000. The prior assessed value in this teaching file is $180,000. The teaching tax rate is 1.10 percent. That rate is not the Board of Equalization's 1.025 percent illustration, and it is not a Sacramento County quote. The Board tells readers to ask the county auditor-controller for the local rate. The month rules and the 0.67 factor are the Board's.

An October change in ownership produces one supplemental bill. The tax becomes effective November 1. The factor for November 1 is 0.67, for the rest of the fiscal year that ends June 30, 2027. The net supplemental value is $450,000 minus $180,000, which is $270,000. The full-year supplemental tax at the teaching rate is $2,970. The one bill is $2,970 times 0.67, which is $1,989.90.

Priya will not own that whole window. She sells on March 16, 2027, so her last day under the Publication 530 split is March 15. From November 1 through June 30 is 242 days. November 1 through March 15 is 135 days. March 16 through June 30 is 107 days. Her share of the supplemental bill is 135 divided by 242, times $1,989.90, which is $1,110.07. The end buyer's share is $879.83. This day split is a teaching way to divide the Board's bill between the parties. It is not the county's proration formula. She reserves the full $1,989.90 until the sale statement actually shows the credit.

The annual bill on the old value is still there. At the same teaching rate, $180,000 produces $1,980 for the fiscal year. She owns 151 days of that fiscal year, October 16 through March 15. Her share is $819.12. The Board says the supplemental is in addition to the annual bill. Her tax to keep is $1,110.07 plus $819.12, which is $1,929.19. She had budgeted $825. The miss is $1,104.19.

Calculation: $450,000 plus $55,000 plus $9,000 plus $51,200 plus $10,000 is $575,200. Plus $8,000 is $583,200. $640,000 minus $583,200 is $56,800. Minus $1,104.19 is $55,695.81. She is still above $40,000.

Decision: Priya proceeds. She does not spend the $1,104 on finishes. She writes a named tax reserve of $1,989.90 outside contingency, because the purchase statement cannot show a bill the assessor has not mailed. She releases $879.83 of that reserve only when the sale settlement statement shows that credit. She leaves the supplemental lump out of the calculator's annual property-tax field. The annual field gets the recurring annual allocation. The lump sits beside the result until the sale proration is real.

Marcus Hale, a two-bedroom house in Fort Worth

Marcus is buying a house for $168,000. His after-repair value is $280,000. Repairs are $40,000. Buying costs are 2 percent, $3,360. Selling costs are 8 percent of value, $22,400. Financing is $7,000. Holding, including a normal proration of the current year plus insurance, utilities, and care, is $5,000. His walk-away profit is $30,000.

Calculation: $280,000 minus $168,000 is $112,000. Minus $40,000 is $72,000. Minus $3,360 is $68,640. Minus $22,400 is $46,240. Minus $7,000 is $39,240. Minus $5,000 is $34,240. The cushion above $30,000 is $4,240.

The tax certificate shows a prior-year base tax of $6,400 that is already delinquent, plus a July payoff. This teaching file applies the Comptroller's description: on July 1 the penalty is 12 percent, and interest is 1 percent a month. Counting February through July is six months, so this file uses 6 percent interest. That is $768 of penalty and $384 of interest. Tax plus penalty plus interest is $7,552. Tax Code Section 33.07 is the additional penalty a taxing unit may add for collection costs. That penalty cannot exceed the attorney's compensation, and Tax Code Section 6.30(c) caps the compensation at 20 percent of the delinquent tax, penalty, and interest collected. This teaching certificate applies that 20 percent to $7,552, which is $1,510.40. It does not apply 20 percent to the $6,400 base alone. The payoff is $9,062.40. Readers should use the figures printed on their own certificate. Not every July bill has accrued six months of interest or the attorney fee.

Publication 530 says that if Marcus agrees to pay those delinquent taxes, he cannot deduct them as taxes. He treats them as part of the cost of the home. On this stack they are acquisition cash. If the price stays $168,000 and he pays the $9,062.40, profit becomes $34,240 minus $9,062.40, which is $25,177.60. That is $4,822.40 under his $30,000 walk-away number. A price cut of the same $9,062.40 does give the cushion back. The lower price offsets the payoff, and buying costs fall because they are 2 percent of price. The new price is $158,937.60. Buying costs fall from $3,360 to $3,178.75, a savings of $181.25. Profit is $34,240 plus that $181.25, which is $34,421.25. That is $4,421.25 above $30,000.

The same certificate shows a $3,200 assessment for a new sidewalk. Publication 530 treats an assessment for a local benefit that increases value, including a sidewalk, as an addition to basis, not as a deductible tax. If the seller pays the delinquency and Marcus takes the sidewalk lien, profit is $34,240 minus $3,200, which is $31,040. That still clears $30,000 by $1,040.

Decision: Marcus does not move $9,062.40 into holding and hope the rehab earns it back. If he pays that payoff and the price stays $168,000, profit is $25,177.60 and he walks. If the price is cut by $9,062.40, the payoff is offset and profit is $34,421.25, so he can accept the cut. The settlement statement has to show which of those two structures is real. He does not treat a matching price cut as if he were still short. If that cut is in place and the sidewalk lien is a recorded $3,200 he has read, he adds the $3,200 to acquisition and profit is $31,221.25, still above $30,000. If instead the seller pays the delinquency and the price stays $168,000, the sidewalk leaves profit at $31,040. Either way the sidewalk stays out of the $5,000 holding line. The current-year proration stays inside that $5,000. It is a different year from the delinquency.

7. Use a tax checklist without an account

Copy this list into the notes app you already use. Check each line against the bill, the tax certificate, or the settlement statement. An empty line is an open item.

1. The parcel number and the property address match the contract.
2. The tax year or fiscal year is written down, including the day it starts if it is not January 1.
3. Taxable value is the assessed value minus the exemptions actually on the bill. The seller's homestead or other exemption is labeled as the seller's.
4. You have asked the assessor what the bill looks like without exemptions you will not qualify for. Any estimate is marked as an estimate.
5. Each taxing unit's amount is listed. Service fees, owner-association dues, and transfer taxes are on other lines.
6. Delinquent prior years, penalty, interest, and attorney fees are a payoff, separate from this year's proration.
7. A local-benefit assessment, such as a new sidewalk or street, is its own acquisition line.
8. The purchase proration days and the sale proration days add back to the period the bill covers. One day is not in both columns.
9. The purchase credit or debit is on the cash-to-close page. It is not also entered as profit or as a second tax.
10. Lender escrow, if any, is cash to close. The holding line uses the tax the lender will pay the collector, not the deposit plus the full annual bill.
11. A supplemental or reassessment bill that cannot exist yet has a named reserve. The reserve is outside the contingency you already set for rotten wood and change orders.
12. The annual property-tax field in the holding-cost calculator is the annual allocation. A lump you already computed is not typed into that field.
13. The flip calculator's monthly holding number includes the tax once.
14. The written choice is in the file: proceed, reprice, or walk. The choice uses the corrected profit, not the first draft that zeroed the tax.

If you cannot check a line, you are not required to guess a rate in order to look prepared. Ask the collector, the assessor, or the title company for the page. A short delay has a holding cost you can compute. A missed supplemental bill arrives anyway.

8. Keep the tax file on the property record

The bill is a project document. The day it arrives, put five facts on the property: the parcel number, the tax year, the annual amount you will use in the calculator, the purchase proration, and any reserve for a bill that is not issued yet. The four-stage pipeline should show the tax certificate as an open task until those five facts exist. A task called "taxes look normal" is not a reading.

A model can file the PDF, copy the parcel number, and list the lines you highlighted. Show the bill next to the summary. If the summary and the bill disagree, the bill wins until the collector revises it in writing. A person accepts the proceed, reprice, or walk decision, and a tax professional accepts the treatment on the return. That review does not depend on which provider drafted the summary. The AI underwriting guide and the AI disclosure state the same limit: a draft is not a decision.

Rehabfolio can hold the tax bill, the proration, the supplemental reserve, and the holding line on the same property. The deal analysis page is where the corrected monthly holding number meets the offer. The budget and expense tracking page is where the county payment, the escrow deposit, and a later supplemental check stay separate. The fix-and-flip workflow is the path from that offer into the rehab. None of those pages files your return or tells the assessor what the house is worth.

If you buy, the same PDF goes to the sale file. The end buyer's closer will ask what was prorated and what is still unpaid. A reserve you released without a credit on the sale statement is a bill you may still owe. Reading it now is cheaper than explaining it at the second closing.

9. Avoid counting the same dollar twice

• Using the listing's last tax as this year's bill. Last year's total can include an exemption you will lose, miss a delinquency, or predate a rate change. Start from the certificate.
• Calling the purchase credit profit. The credit pays the seller's days. Your days are still a holding cost. Dana's $590 credit did not pay her $1,800.
• Putting the full annual bill in holding and also keeping the credit. That charges you for days the other parties own, and then treats their share as if it improved your profit.
• Typing a prorated share into the annual tax field. The holding-cost calculator divides that field by 12. A share you already prorated gets prorated again.
• Adding the escrow deposit on top of the annual tax. The deposit is a prepayment. Publication 530 limits the homeowner deduction to what the lender paid the collector. The calculator warns against the same double count.
• Hiding a delinquent payoff inside the monthly estimate. A prior year is a lump. Marcus's $9,062.40 payoff is larger than his $4,240 cushion, so paying it on top of the $168,000 price drops profit to $25,177.60. A price cut of the same amount offsets the payoff and leaves $34,421.25. Spreading the lump across six months would have made the walk look like a normal tax bill.
• Dropping the supplemental reserve because the purchase statement was silent. The statement is silent when the assessor has not billed. Priya's reserve stays until the sale statement shows the credit.
• Spending a sunk tax payment as a reason to add finishes. The bill is a fact either way. Compare the upgrade with the profit that remains after the tax, not with a draft that zeroed the tax.

None of these require a careless closer. They require an ordinary week in which the fastest path is to copy last year's tax into the offer. The checklist is the slower path on purpose.