Pre-Purchase Tax Shock Calculator
Estimate future property tax resets and avoid post-sale “tax shocks”.
Find these on the listing or the county assessor's site. Don't know them?
Why New Homebuyers Face Hidden Tax Spikes
When listing a property, sellers display their current annual property tax bill (e.g. $4,000/year). However, because of assessment cap programs (like Texas Proposition 13 or Michigan Proposal A), their assessed value has been frozen or capped at inflation rates for years.
Upon transferring the property, the county assessor is legally required to remove the previous owner's cap. The taxable value resets to match your new purchase price. If you buy a house for $500,000 that was previously assessed at $250,000, your property tax bill can double in the second year, causing a severe mortgage escrow shortage.
Use our Pre-Purchase Tax Shock Planner to estimate this reset before making an offer on a home. Understanding your future tax liability prevents unexpected monthly mortgage adjustments.
How to Avoid Mortgage Escrow Shortages
Do not calculate your monthly budget based on the seller's current tax statement. Always compute your mortgage underwriting using the purchase price reset value.
Submit your tax shock calculation report to your lender at closing. Ask them to verify and fund your escrow reserves based on the projected uncapped valuation.
As soon as you close, file your homestead exemption paperwork to apply a new cap on your property assessment, limiting future tax increases to 10% per year.
Frequently Asked Questions
Keep 100% of your savings
Traditional property tax firms charge 30% to 50% of your savings as a success fee. TaxAppealAgent gives you your complete AI appeal letter and comparable sales evidence for a flat $29.