Escrow Shortage Calculator / Guides
Once a year your servicer mails you a dense packet of numbers and your payment changes. That packet is the annual escrow analysis, and learning how to read an escrow analysis statement is the difference between understanding your mortgage and just reacting to it. Most borrowers flip to the last page, see the new payment, and file the rest. The useful information is on the first two pages, and it takes about five minutes once you know where to look.
Almost every servicer uses the same two page layout, because the federal rules behind it are the same. Page one is the projection: what they expect to collect and pay over the next 12 months. Page two is the history: what they projected last year versus what actually happened. Everything on the statement exists to answer one question: will the account stay above its required minimum all year?
Page one shows your projected beginning balance, the monthly deposits they plan to collect, the disbursements they expect to make for taxes and insurance, and the running balance month by month. Somewhere on that page is the number that decides everything: the lowest the balance is projected to go.
That low point gets compared against your minimum required balance, which is the cushion. Federal rules cap the cushion at one sixth of your projected annual disbursements, which works out to two months of escrow payments. Your servicer cannot require more than that, though a few states cap it lower. If the lowest projected balance sits below the cushion, you have a shortage. If it sits above, you have a surplus.
A concrete example, borrowed from a servicer's own explainer: minimum required balance $600, lowest projected balance $350, shortage of $250. Same setup with a lowest projected balance of $800: surplus of $200. The arithmetic is simple subtraction. The statement just buries it.
Page two lines up last year's projection against what actually happened: projected tax bill versus actual tax bill, projected premium versus actual premium. This is the page that tells you why there is a shortage, and it is the page most people never read.
Run your eye down the actual column and compare it to the projected column. Taxes jumped 18 percent after a reassessment? That is your shortage, and it will probably repeat next year because the new assessed value is the new baseline. Insurance premium up 30 percent? Same story, and worth a phone call to your agent, because a 30 percent jump sometimes means your coverage changed without you noticing. If the actuals match the projections and there is still a shortage, the cushion math shifted, which usually means disbursements grew and the two month buffer grew with them.
One thing page two reveals that nothing else will: errors. A tax bill the servicer paid twice, a premium for a policy you replaced midyear, a disbursement to the wrong payee. They are uncommon, but the annual statement is the only document that would show them, which is the real reason to read it instead of skimming it.
Here is the sentence that causes the most confusion, usually printed near the payment options: paying the shortage in full does not necessarily keep your payment flat. The shortage payment covers the gap. Your new monthly escrow deposit is set from the new, higher tax and insurance bills, so it can still rise even after you write the lump sum check. People feel cheated by this every year. It is not a trick; it is two separate calculations, and the statement shows both if you look.
The surplus side has its own quirk. If the surplus is $50 or more, the servicer must refund it within 30 days of the analysis. Under $50, they can just apply it to future payments. Either way, a surplus usually means the estimates at closing were high or a bill came in lower than expected. On new construction it can be dramatic: the lender may have estimated taxes on the finished home while the first bill reflected an empty lot.
For the full rules on what the servicer can and cannot do with a shortage, including the 12 month spread option, see the RESPA repayment rules. For why the payment went up in the first place, the payment-increase breakdown walks through the usual causes. And if this happens every single year, the every-year causes piece explains the structural reasons.
It is the annual review your mortgage servicer is required to perform under RESPA. It projects your escrow deposits and disbursements for the next 12 months, compares the projected lowest balance against the required cushion, and sets your new monthly escrow payment. You receive a copy every year.
Find the lowest projected balance on page one and compare it to the minimum required balance (the cushion). If the projected low is below the required minimum, the difference is your shortage. The statement usually states the shortage amount explicitly near the payment options.
The cushion is a buffer your servicer may hold against unexpected increases, capped by federal rules at one sixth of projected annual disbursements, equal to two months of escrow payments. The statement shows it as the minimum required balance. Some states cap it lower.
Because the shortage payment and the new monthly deposit are two separate calculations. The lump sum covers the past gap; the new deposit is set from the new, higher tax and insurance bills. If the bills rose, the deposit rises with them regardless of the shortage payment.
Usually nothing. Surpluses of $50 or more must be refunded to you within 30 days of the analysis; smaller ones get applied to future payments. Check page two to see why: lower bills than projected, or an overestimate at closing, are the common causes.