Property Tax Shock: Why Your Taxes Spike After Buying a Home

When a property sells in Florida, the county property appraiser reassesses it at or near the purchase price. This is a state law requirement — the sale is the most reliable indicator of current market value, so it triggers a reassessment.

The seller’s tax bill was almost certainly lower than yours will be, for a simple reason: Save Our Homes. Florida’s Save Our Homes cap limits annual increases in assessed value to 3% or the rate of inflation, whichever is lower. A seller who bought their home ten or fifteen years ago has had a decade of capped assessments — their assessed value may be significantly below current market value, and their tax bill reflects that lower number.

When the property transfers to you, the cap resets. Your assessed value starts at or near what you paid. Your first full year of taxes reflects that reset.

Your mortgage payment includes principal, interest, and an escrow payment that covers property taxes and homeowners insurance. The lender collects a portion of your estimated annual taxes each month and pays the county on your behalf when the bill comes due in November.

Here’s where it breaks down. When your loan was set up, the lender estimated your future tax bill based on the most recent available data — which at the time of closing was the seller’s lower tax bill. The lender collected escrow payments based on that estimate. Then the reassessment happened, your assessed value reset to the purchase price, and your actual tax bill came in substantially higher than what the lender had been collecting for.

The lender pays the actual bill in November regardless. Now there’s a deficit in your escrow account. The escrow analysis — which lenders are required to do annually — identifies the shortfall and issues you a notice. You’re typically given two options: pay the shortfall as a lump sum, or spread it across the next 12 months by increasing your monthly payment.

Most people choose the spread — which is why the mortgage payment goes up. The increase isn’t a rate change or a fee. It’s your taxes catching up to what you actually owe, spread over 12 months plus a buffer to prevent it from happening again next year.

Here’s a simplified example of how the shortfall develops:

These are illustrative figures. Actual amounts depend on your purchase price, county millage rate, and how long the previous owner had been in the home. The pattern — seller’s bill is lower than yours will be, lender underestimates, shortfall occurs — plays out consistently across Central Florida.

Before you close: Use your county property appraiser’s online tax estimator with the purchase price — not the seller’s current tax bill — to get a realistic picture of what your taxes will be. Every county in Central Florida has one. This is the number to use when budgeting your monthly housing costs. I walk through this with every buyer I work with before we get under contract on a home.

Ask your lender to use the estimated post-sale tax amount. Some lenders will adjust their escrow calculation based on a higher estimated tax figure if you provide the county estimator output. Not all will, but it’s worth asking. A more accurate initial escrow calculation means a smaller shortfall — or none at all — in year one.

Set aside a buffer. If you know your taxes will reset, budget for the higher number from day one. The additional monthly cost — typically $100 to $250 depending on the size of the reset — won’t come as a shock if you’ve already accounted for it.

File for homestead exemption immediately after January 1st. The exemption won’t prevent the reset, but it reduces the assessed value by up to $50,000 starting in your first full tax year. Apply by March 1st. Every year you miss the deadline is a year of savings you don’t get back.