Property tax reassessment after purchase: the hidden DSCR killer

Most DSCR files get priced off the property tax bill the seller was paying. That number is often the least reliable line in the whole file. When a rental changes hands, many jurisdictions reassess it to the new purchase price, and the tax bill the lender used at underwriting can be 30% to 100% below what you will actually owe by the following year. A deal that closes at a 1.25 DSCR can run at 1.08 within twelve months without a single dollar of rent changing. This guide covers how underwriters treat taxes, which states reset on sale, and how to size a loan so the reassessment does not break the ratio.

How lenders actually calculate the tax line

DSCR is rent divided by PITIA: principal, interest, taxes, insurance, and association dues. For taxes, the underwriter usually takes the figure from the title commitment or tax certificate. If that is the seller's current bill, some lenders use it as-is. More careful ones recalculate using the purchase price multiplied by the local effective rate, and the strongest shops do this automatically for purchases in known reset states.

The difference matters. On a $300,000 purchase in a market with a 1.2% effective rate, the reassessed bill is $3,600 a year, or $300 a month. If the seller had owned for a decade and paid $1,800, the lender that uses the old bill understates PITIA by $150 a month. On a $2,600 monthly payment, that is roughly 5.8% of the denominator, enough to move a 1.20 ratio to about 1.13.

Ask your loan officer one question before you lock: does the quote use the current tax bill or a reassessed estimate based on my price? The answer tells you whether the DSCR on your term sheet is the number you will live with.

States where a sale triggers a full reassessment

The reset mechanics vary a lot by state, and that is the main reason two identical-looking deals can have different outcomes.

In Florida, non-homestead property carries a 10% annual assessment cap, but that cap falls away on a change of ownership. The property is reassessed to just value as of January 1 of the year after the sale. An investor who buys a duplex in Tampa for $340,000 that was assessed at $210,000 can see the taxable value jump by $130,000, which at roughly 1.8% all-in is about $2,340 more per year. Our Tampa deep dive covers this alongside the insurance side of that market.

California resets to purchase price under Prop 13, then caps growth at 2% a year. The first-year jump is steep, but the annual growth afterward is the most predictable in the country.

Texas is different because there is no state income tax and local rates run high, typically 1.8% to 2.5% all in. Appraisal districts value property annually at market, so a sale price is strong evidence at the next appraisal. Non-homestead property under $5 million has had a temporary 20% annual cap on value growth, but that cap is a time-limited provision and underwriters do not give you credit for it. A Dallas rental bought at $280,000 should be underwritten at roughly $5,600 to $6,300 a year in tax, not the prior owner's figure. See the Dallas-Fort Worth market page for current context.

States and counties that reassess on a schedule, not a sale

Ohio is the clearest example of the opposite. Counties run a full reappraisal every six years and an update at the three-year mark, and a sale alone does not automatically change the bill. That does not mean you are safe, though. Appraisers pull sales data into the update, so a Cleveland single-family bought at $115,000 that was carried at $78,000 will usually be corrected at the next cycle. With rates near 1.6% on average in Ohio, the eventual move is from about $1,250 to about $1,840 a year.

The practical takeaway is that a schedule-based state delays the hit but does not remove it. A conservative underwriter models the future bill, and you should too. The Cleveland market page covers the local rent-to-price picture that makes those higher taxes tolerable.

Why the escrow shortage compounds the problem

Taxes are almost always escrowed on DSCR loans, so a reassessment shows up as a payment increase rather than a one-time bill. The servicer runs an escrow analysis annually. If the new assessment lands mid-year, the escrow account falls short, and you pay both the higher monthly amount going forward and a catch-up of the shortfall, either as a lump sum or spread over twelve months.

Using the Tampa example above, a $2,340 annual increase arriving in November leaves a shortage of roughly $1,950 by the following spring in addition to the $195 per month step-up. We walk through the mechanics, including cushion rules and how lenders size the initial deposit, in the guide to escrow impounds, taxes, and insurance underwriting. If the property is already thin on reserves, a shortage can become a liquidity problem even when the ratio still passes.

A worked example: the same rent at three tax assumptions

Take a $320,000 single-family purchase with 25% down, a $240,000 loan at 7.25% on a 30-year fully amortizing schedule. Principal and interest is about $1,637. Insurance is $190 a month and monthly rent is $2,700.

With the seller's old tax bill of $2,100 a year ($175 a month), PITIA is $2,002 and DSCR is 1.35. That is a comfortable file at nearly any lender.

With a reassessed bill at a 1.3% rate, $4,160 a year or $347 a month, PITIA becomes $2,174 and DSCR drops to 1.24. Still fine for most programs, but the pricing grid may shift by an eighth to a quarter point.

With a high-tax reassessment at 2.1%, $6,720 a year or $560 a month, PITIA reaches $2,387 and DSCR falls to 1.13. Many lenders still approve it at 1.10 or 1.15 minimums, but you may lose the best rate tier and face a lower LTV cap, commonly 70% rather than 75%.

Nothing about the property changed across those three cases. Only the tax assumption did. Walk through the full ratio mechanics in how DSCR works and rerun your own numbers before you make an offer.

How to protect the ratio before you close

Get the reassessed number before you submit an offer. Call the county assessor or look up the millage rates and compute the estimate on the purchase price yourself. Subtract any exemptions that will not carry over, since homestead and senior exemptions normally fall away for an investor.

Next, plan to protest. In Texas and several other states you can protest your appraisal each spring, and if the district priced you above comparable sales, a successful protest of 10% on a $6,000 bill saves $600 a year. Treat this as upside, not as part of the underwriting.

Finally, size the loan for the worst-case tax figure. If the reassessed ratio drops under 1.15, consider a lower loan amount, a larger down payment, or an interest-only structure to restore the margin. A $20,000 larger down payment on the example above lowers P&I by about $136 a month, which offsets most of a $2,000 annual tax increase. Compare how each of the DSCR lenders in our directory treats purchases versus refinances, and ask which ones recalculate taxes on price.

What changes at refinance

On a refinance, the lender generally uses the current tax bill, because the reset (if any) already happened. That makes the refinance a cleaner test of the real ratio. If you bought and refinanced through a BRRRR exit after twelve months, the stabilized bill is in the numbers and the appraiser's rent schedule is the only variable left. A property that cleared at purchase can fail the ratio test on the refinance once the reassessment lands, which is why seasoned investors build the higher tax figure into their original acquisition model and treat the refinance as confirmation rather than discovery.

For anyone scaling across several states, the tax regime should be a screening criterion alongside rent-to-price. A market with a 1.0% rent-to-price ratio and 0.6% taxes can outperform a 1.2% market with 2.4% taxes on a DSCR basis, even though it looks weaker on a headline-yield screen.