Why lenders escrow at all
Unpaid property taxes become a lien senior to the mortgage — the county gets paid before the lender. Escrow removes that risk, which is why loans with less than 20% down almost always require it, and why waiving it (where allowed) can cost a small rate premium. For you, escrow converts one or two large annual bills into flat monthly installments — convenient, as long as you understand the annual reset.
The annual analysis: where surprises come from
Once a year the servicer compares what escrow collected against what it actually paid, projects next year's bills, and recalculates your monthly deposit. Three outcomes: a surplus over $50 is refunded; a shortage gets spread over the next 12 months (raising your payment); and rising tax assessments raise the go-forward deposit too — a double-hit that explains those "my payment jumped $300" stories. New-construction buyers get the sharpest version: year-one escrow is often estimated on the land-only tax bill, then resets brutally when the completed home is assessed.
What you can control
- Check the assessment, not just the rate. Assessed values can be appealed — county deadlines are strict, success rates are meaningful, and a lower assessment lowers escrow permanently.
- Claim your exemptions. Homestead exemptions (and senior/veteran variants) reduce the taxable value in most states; they usually require a one-time filing that new buyers forget. Our state pages note the big ones.
- Budget with the real rate. Statewide averages span 0.27%–2.23%; your county may differ from both. Enter your county's actual rate in the calculator before falling for a listing.
- Keep the cushion in mind. Federal rules let servicers hold up to two months of extra escrow as a cushion — that's normal, not an error.
Escrowed taxes and your amortization
Tax dollars never touch your loan balance — $400/month of escrow builds zero equity. When comparing loans or deciding on extra payments, always separate P&I (the amortizing part — see how amortization works) from escrow (a pass-through bill). Our calculators print them as separate lines for exactly this reason.