HECM Principal Limit Estimator
Updated October 2026
A reverse mortgage lets homeowners aged 62 and older convert part of their home equity into cash without selling or making monthly mortgage payments. The most common type is the Home Equity Conversion Mortgage (HECM), insured by the Federal Housing Administration (FHA). Instead of you paying the lender, the lender pays you — as a lump sum, line of credit, or monthly payments — and the loan balance grows over time. It’s repaid when you sell, move out permanently, or pass away.1 This calculator estimates your available proceeds based on the same factors the FHA uses.
The amount you can access is governed by the Principal Limit Factor (PLF) — a percentage set by HUD that depends on the age of the youngest borrower and the "expected interest rate." Older borrowers and lower rates produce a higher PLF, meaning more available cash.2 The PLF is applied to your home value, capped at the FHA lending limit ($1,209,750 in 2026).
| Age of Youngest Borrower | Approx. PLF (at ~7% rate) | On a $450,000 Home |
|---|---|---|
| 62 | ~36% | ~$162,000 |
| 70 | ~46% | ~$209,000 |
| 75 | ~53% | ~$237,000 |
| 80 | ~59% | ~$265,000 |
PLF values are approximate and set by HUD tables that change periodically. Actual figures depend on the expected rate at closing.
Reverse mortgages carry meaningful upfront costs. The FHA charges an upfront Mortgage Insurance Premium (MIP) of 2% of the maximum claim amount, plus an ongoing 0.5% annual MIP on the balance. Lenders charge an origination fee (capped by formula, typically $2,500–$6,000) and standard closing costs for appraisal, title, and recording. These costs are usually rolled into the loan, reducing your net proceeds — which is why this calculator subtracts them from your available cash.3
You make no monthly payments, but you must keep paying property taxes, homeowners insurance, and maintenance — falling behind on these can trigger default. The loan becomes due when the last borrower sells, moves out for more than 12 months (for example, into long-term care), or dies. Because HECMs are non-recourse, you or your heirs never owe more than the home is worth when sold, even if the balance has grown beyond the home’s value. Heirs can repay the loan and keep the home, or sell it and keep any remaining equity.4
A reverse mortgage suits older homeowners who want to stay in their home and supplement retirement income without monthly payments. A HELOC is cheaper to set up and more flexible but requires monthly payments and income qualification — difficult for many retirees. A home equity investment (HEI) also avoids monthly payments and has no age floor, but gives up future appreciation. For homeowners over 62 focused on aging in place, the HECM’s line-of-credit option (which grows over time) is often the most powerful tool. Pair this with our Social Security Optimizer and Retirement Calculator for a full picture.
One underappreciated feature of the HECM line-of-credit option is that the unused portion grows over time at the same rate as the loan would accrue interest. This means a line of credit opened at age 62 can be substantially larger by age 75, providing a hedge against future cash needs and even against declining home values. Some financial planners recommend opening a HECM line of credit early in retirement specifically to let this growth compound, then drawing on it only when needed — a strategy that turns the reverse mortgage into a standby financial resource rather than an immediate cash grab.
→ Consider the line-of-credit option, not just a lump sum. The HECM line of credit grows over time on the unused balance, making it a powerful standby resource. Many planners recommend opening one early in retirement and drawing only when needed.
→ Budget for ongoing obligations. You make no mortgage payments, but you must keep paying property taxes, insurance, and maintenance. Falling behind can trigger foreclosure. Make sure these fit your retirement budget.
→ Compare against a HELOC if you can qualify. A HELOC is cheaper to set up, but it requires monthly payments and income qualification. If you have steady retirement income, compare both before committing.
→ Complete HUD counseling with questions ready. HUD-approved counseling is required and genuinely useful. Bring questions about costs, heirs, and alternatives. It’s a chance to confirm a reverse mortgage truly fits your situation.