The Escrow Surprise That Breaks Subject-To Underwriting
A property tax reassessment after purchase raises the tax escrow inside your mortgage payment, and the seller's statement will never show it coming. The county reassesses at transfer, the exemptions that belonged to the seller come off, and the servicer raises what it collects from you to cover the new bill.
How bad that gets depends on what the seller was paying and why they were paying it. On some files the payment moves by $40 a month and nobody really notices. On others, it moves by enough that the deal stops working.
But it's not that simple. The escrow can already be short before you get there, and that arrives at the same time.
Every one of these numbers is knowable before you sign, and nobody is going to hand them to you.
What Happens to Property Taxes After a Subject-To Closing?
The county reassesses the property once the sale is recorded. The assessor sets a new value at or near what you paid for it, the next bill goes out at that number instead of the old one, and because property taxes are collected inside your monthly mortgage payment, the servicer raises what it takes from you each month to cover the difference.
How you structured the purchase makes no difference to any of this. As far as the county is concerned the property changed hands, so a new rate applies and the bill goes to whoever owns it now, and if that bill stays unpaid for long enough the property ends up at a tax sale. That's your problem to solve, and nobody else's.
Which Tax Exemptions Disappear When You Take Title?
Tax exemptions belong to the owner rather than to the house, which is the part that catches people out. A homestead exemption, a senior exemption or a disabled veteran exemption was granted to a particular person who met particular conditions, and none of them carry across to a buyer who doesn't meet those conditions themselves.
This is where the numbers move hardest. A disabled veteran exemption can take a property tax bill down to nothing, so the seller's mortgage statement shows almost nothing going into escrow for taxes and the whole payment looks manageable. Once title moves to an investor the full assessment lands, and the escrow has to grow to cover a bill that wasn't there a month earlier.
Nothing about the house changed.
The person on the deed did.
Why Doesn't the Seller's Mortgage Statement Show Your Real Payment?
Because it's a record, not a forecast. The statement shows what the servicer is collecting today, under the previous owner's assessment and the previous owner's exemptions. Reading it as your future payment is the most common underwriting mistake I see on subject-to deals.
Wholesalers make the same mistake at scale. A deal advertised at 16% cash-on-cash, underwritten on the seller's current taxes, can land negative once the real bill shows up.
That isn't a scam so much as honest math run on the wrong number, and the buyer is the one who ends up carrying it.
Is the Escrow Account Already Short Before You Buy It?
Often, yes.
Escrow accounts undercollect more often than people expect, and the shortage travels with the property when it sells. Tax bills change every year while servicers only run an escrow analysis once a year, so a seller whose assessment moved up mid-year has been quietly underpaying into escrow ever since, and you inherit that gap on the day you close.
I got underbilled by $13,000 over 18 months on one of my own properties for exactly this reason. Nothing looked wrong on the statement at any point along the way. The escrow was simply collecting less than the annual liability, month after month, until the servicer's analysis finally caught up with it.
When it does catch up, you get one of two things: a lump-sum demand for the shortfall, or a permanent increase in the monthly payment.
Here's an example of what that gap looks like on a single file, comparing what the statement says the escrow is collecting against what the county is actually going to bill. The numbers are rounded for the example rather than lifted from a real deal, but the shape of it is what turns up in practice.
Tax escrow check on one file | Amount |
|---|---|
Stated monthly PITI on the seller's statement | $1,850 |
Escrow being collected for taxes | $200 / month |
Actual annual county tax bill | $4,800 |
Escrow actually required | $400 / month |
Monthly shortfall | $200 / month |
Twelve months of a $200 shortfall is $2,400 of underfunded escrow. The next analysis turns that into a $2,400 bill or a $200 monthly increase, and your real spread was $200 thinner than your model said all along.
PRO TIP: Run the tax check before you send the offer. What you find changes what the deal is worth, and by the closing table you've already committed to a price.
How Do You Verify the Tax Escrow Before You Make an Offer?
Verify the tax escrow in four steps and about 20 minutes.
Pull the current tax bill from the county. The assessor or treasurer's site lists the annual tax for the address. Divide it by twelve.
Compare that figure to what the escrow is collecting. The seller's mortgage statement breaks PITI into its parts. Any gap between the two numbers is a shortage that is already running.
Ask the assessor what the property reassesses at on a sale at your price. Most counties reassess at or near the sale price, and the office will explain the mechanism for that county.
Check what comparable recent sales did. Public records show their post-sale tax history, which is the closest thing to a real answer you'll get.
The point of these steps is a payment figure built on post-transfer taxes rather than the seller's, because that is the number your cash flow should actually be running on. Hold a reserve for the catch-up too, since a servicer's escrow analysis can land before the reassessment has even settled.
How Does a Reassessment Reach the End Buyer on a Wrap?
A reassessment on a wrap flows straight through. The county notifies the servicer, the servicer raises PITI on the underlying loan, and the investor in the middle absorbs the increase from the day it lands. The adjustment can lag the county's notice by weeks, so the gap gets funded out of pocket first.
Wrap paperwork has to carry that. Taxes and insurance get declared as estimates that can change, the wrap buyer hears it before signing, and a pre-funded escrow cushion absorbs the first increase.
A buyer who was never warned will treat it as a breach.
Key takeaways
Underwrite the payment you're going to be making rather than the one the seller is making now.
Pull the county bill, check which exemptions belong to the current owner, compare both against what the escrow is actually collecting, and put the post-transfer figure into your model before you make an offer.
Hold a reserve for the catch-up as well, because a shortage that was already running won't wait for your reassessment to finish before it surfaces.
The deals that go bad this way were never good deals in the first place. They were measured wrong.
Read next: Who Makes the First Mortgage Payment After a Sub-To?
Want to talk it through? Book a call and we will walk your numbers before you commit to a price. Or send your contract any time to [email protected]. Subject-to and wrap closings are what we handle every week.
This article is general information, not legal or tax advice. Assessment practices, exemption rules, servicer escrow procedures and state law vary, and outcomes depend on the specific facts of a transaction and the county involved. Consult a qualified attorney or tax professional in the relevant state before acting. Creative Title is a licensed title and settlement services provider in Colorado and Tennessee.
Frequently Asked Questions
Do property taxes go up when you buy a property subject-to? Usually, yes. Most counties reassess on transfer at or near the sale price, and any exemption that was tied to the previous owner comes off at the same time.
What is an escrow shortage? An escrow shortage is the gap between what the servicer collected for taxes and insurance and what those bills actually cost. The servicer clears it with a lump-sum demand, a higher monthly payment, or some combination of the two.
Does a homestead exemption transfer to the new owner? No. A homestead exemption belongs to the owner who qualified for it and ends when title transfers to someone who doesn't qualify on their own.
Who pays the escrow shortage on a subject-to? The buyer. You took the property with the loan and the impound account exactly as they were, shortage included.
Will the servicer raise my payment automatically after a reassessment? The servicer should, but rarely on time. The adjustment usually lags the county's notice, and the shortfall accrues while you wait for it.
