You closed on your home, your payment was exactly what the paperwork said, and everything felt fine. Then about a year later a letter arrives from your servicer saying your monthly payment is going up by a few hundred dollars. Nothing about your loan changed. What changed is your property taxes, and this is the single most common payment surprise in homebuying.
Property taxes get reassessed when you buy
Your property tax bill is based on the assessed value the county assigns to the home, multiplied by the local tax rate. The part most buyers do not realize is that the assessed value on record is the seller's assessed value, not yours.
In Florida, longtime owners often have an assessed value far below what the home is actually worth. That happens for two reasons that both work in the seller's favor and disappear the moment you buy:
The result is straightforward and often severe: a home taxed on a $180,000 assessed value can suddenly be taxed on a $450,000 assessed value. Same house, same roof, dramatically different tax bill.
Where payment shock comes from
Here is where the loan structure matters. When your lender builds your monthly payment, the escrow portion has to be based on an estimate of next year's taxes. There are two ways to do it.
Estimated taxes
Your lender estimates the reassessed tax bill based on your purchase price and the local millage rate, then escrows that amount from day one.
Your payment is higher at closing, and it is close to accurate. When the real bill arrives, there is little or no surprise.
Current taxes
Your lender escrows based on the seller's existing tax bill, the one still reflecting their capped value and their exemptions.
Your payment looks great at closing. Then the reassessed bill arrives, your escrow account does not have enough to pay it, and your payment climbs.
The number on your closing disclosure is not a promise
A payment structured on current taxes is accurate for the taxes that exist today. It was never a forecast of what you will pay in year two. That distinction is where the shock lives.
What an escrow shortage actually is
Your escrow account is the holding account your servicer maintains to pay your property taxes and homeowners insurance for you. A slice of every monthly payment goes into it, and when the bills come due, the servicer pays them out of that account.
Once a year, your servicer performs an escrow analysis. They compare what actually got paid out against what came in, and project the next twelve months.
An escrow shortage is what they find when the account did not hold enough to cover the bills. If you were escrowing for a $2,400 tax bill and the reassessed bill came in at $7,200, your account is short by $4,800.
The shortage hits your payment twice
First, the catch-up. The shortage has to be repaid, and it is typically spread across the next twelve monthly payments, or you can pay it as a lump sum.
Second, the new baseline. Going forward your escrow has to collect enough for the higher tax bill every year, so the ongoing escrow portion rises permanently.
Both increases land on the same payment at the same time, which is why the letter feels so jarring.
A $450,000 purchase, structured on the seller's current taxes
Then the reassessed bill arrives at $7,200 per year.
That is $800 more per month, and $400 of it is temporary while the shortage is repaid. Nothing about the loan changed. The taxes simply became yours.
So can you buy with current taxes?
Yes. It is allowed, it is not a trick, and there are situations where it genuinely serves as a bridge. If you are expecting a raise, a bonus structure, a spouse returning to work, or you have strong reserves and you fully understand what is coming, structuring on current taxes can get you into a home now rather than later.
But it is not what I recommend, and the reason is simple: you are taking on a payment you cannot yet see. The escrow analysis is a year away, the reassessed value is an estimate until the county issues it, and the increase arrives on a schedule you do not control.
If you do go this route
Ask your lender to run the payment both ways before you commit, so you see the current-tax payment and the estimated-tax payment side by side. Then ask yourself honestly whether the higher number still works for your budget.
If the answer is no, the issue is not the escrow structure. It is that the house is above your range, and finding that out now costs you nothing.
How to protect yourself
- Ask which taxes your quote uses. Current or estimated. This one question surfaces the entire issue.
- Use the county's tax estimator. Every county property appraiser offers a tax estimator calculator where you enter the new purchase price and it projects what the taxes will be. That is usually the number we use when structuring your payment.
- File your own homestead exemption if the home is your primary residence. In Florida the deadline is March 1 for the following tax year, and it meaningfully reduces your taxable value.
- Keep a reserve. Even a well-estimated escrow can shift with insurance premiums and millage changes.
- Read the annual escrow analysis when it arrives instead of filing it away. It tells you exactly what is changing and why.
The bottom line
Buying a home triggers a property tax reassessment. The seller's capped value and exemptions go away, and the county reassesses at current value. If your loan was structured on the seller's current taxes, your escrow account will come up short at the first annual analysis, and your payment rises twice over: once to repay the escrow shortage, and once to fund the higher ongoing bill.
Structuring on estimated taxes means a higher payment on day one and no surprise in year two. Current taxes can work as a bridge if you know exactly what you are signing up for. What you never want is to find out from a letter.
Want to see your payment both ways?
I will run your numbers using current taxes and estimated reassessed taxes side by side, so you know the real payment before you write an offer.