Your monthly escrow payment, the cushion, and why it changes every year
| Component | Yearly | Monthly |
|---|
| Insurance (annual) | Monthly escrow payment |
|---|
"Why did my fixed-rate mortgage payment go up?" — the most common question in home ownership, and the answer is always escrow. Your servicer collects a twelfth of your property tax and insurance with each payment, holds it, and pays the bills when due. When the bills rise, the collection rises; when the account runs short, a shortage repayment gets added on top. This calculator reproduces the escrow analysis math so the annual letter never surprises you again.
Federal rules (RESPA) also let the servicer keep a cushion of up to two months of escrow payments as a buffer. The cushion isn't a fee — it's your money, sized so a tax bill arriving early doesn't overdraw the account.
Once a year, the servicer projects the next twelve months of bills against the account balance. Three outcomes:
| Result | What happened | What changes |
|---|---|---|
| Surplus > $50 | Bills came in lower than projected | You get a refund check by law |
| Balanced | Projections held | Payment adjusts only for next year's bill growth |
| Shortage | Taxes/insurance rose mid-year | Payment rises twice over: next year's higher bills ÷ 12, PLUS the shortage ÷ 12 |
That double effect is why payments jump more than the tax increase alone suggests: a $600 tax increase creates a $50/mo bill effect plus a ~$50/mo shortage repayment for a year — a $100/mo letter for a $600 problem. The calculator's shortage field reproduces exactly this.
In recent years the fastest-growing escrow line isn't taxes — it's homeowners insurance, up 10–25%/yr in wind, hail and wildfire states. If your escrow jumped, pull the insurance line from the analysis first and shop the policy: unlike taxes, that bill is negotiable annually (the Home Insurance Estimator benchmarks it).
Principal and interest never change on a fixed loan — but taxes and insurance flow through escrow at cost, and they rise. Add a shortage repayment and the annual letter can raise a payment 5–15% in a single year.
Yes, always — it keeps the monthly increase down to just the bill-growth portion. Whether it's worth it is a cash-flow choice; there's no discount either way.
Up to two months of escrow payments RESPA allows the servicer to hold as buffer. It's included when your initial escrow is set at closing — part of why 'prepaids' at closing feel large.
On conventional loans at ≤80% LTV, usually yes (sometimes with a fee or slight rate adjustment). FHA and most low-down-payment loans require escrow for the life of the loan.
The account closes and the balance is refunded within ~20–30 days. When refinancing, you fund a new escrow at closing and receive the old one back after — plan the cash-flow gap.
Surpluses over $50 must be refunded to you by check; under $50 may be credited against payments. If a refund doesn't arrive within 30 days of the analysis, call the servicer.
Yes — every figure computes locally in your browser.
Escrow isn't mysterious — it's two big bills traveling in monthly disguise, plus a cushion, plus last year's forecasting error. Reproduce your analysis letter here once and you'll read every future one in ten seconds flat.