Reverse Mortgage Principal Limit: How Much Can You Borrow?

Your reverse mortgage principal limit is the most you can borrow with a Home Equity Conversion Mortgage (HECM), the reverse mortgage insured by the Federal Housing Administration (FHA). It is almost always less than your home’s value, and it is set by your age, the interest rate environment, and your home’s value.

This guide explains what each of those pieces does, walks through a simple illustration, and shows why you may not be able to take the whole amount at once. It is general education, not a loan offer or quote.

What Is a Reverse Mortgage Principal Limit?

The principal limit is the total amount of loan money available to you over the life of the loan. Federal HECM rules define the principal limit as the maximum amount calculated from the youngest borrower’s age, the expected interest rate, and the home’s value.

Everything comes out of the principal limit first. That includes paying off any mortgage you already have and any closing costs you choose to finance. What’s left is what you can receive as cash, monthly payments, or a line of credit.

• Principal limit: the ceiling on what the loan can provide.
• Loan balance: what you actually owe, which starts with what you use and grows over time.
• Net available funds: the principal limit minus payoffs, financed costs, and any required set-asides.

What Is a Principal Limit Factor?

A principal limit factor (PLF) is a percentage from a table published by the U.S. Department of Housing and Urban Development (HUD). Your lender looks up the factor that matches two things: the age of the youngest borrower and the expected interest rate on your loan.

The lender then multiplies that factor by your home’s value, up to the FHA limit. The result is your principal limit. HUD’s table lists a factor for each age and each expected rate in steps of one-eighth of a percent. Lenders read the published number; they don’t make up their own.

The factor is never 100%. HUD keeps part of your equity unborrowed so that interest and mortgage insurance can be added to the balance over the years.

How Does Age Affect the Principal Limit Factor?

Age is the piece people notice first. In HUD’s table, the factor rises as the youngest borrower gets older, when the expected rate is the same. An older borrower is expected to have the loan for fewer years, so less room is held back for future interest.

The age that counts is the youngest person on the loan. If you are married and your spouse is younger, the lender generally uses your spouse’s age, even if your spouse is not a borrower. HUD calls this an eligible non-borrowing spouse, and there is a separate HUD table for spouses under 62.

That rule protects the younger spouse, but it can mean a lower principal limit. Read more about what a non-borrowing spouse is and the protections they have.

How Does the Expected Rate Change Your Principal Limit?

The expected rate is the interest rate HUD’s formula uses to estimate how fast your balance could grow. On a fixed-rate HECM it is the same as your note rate. On an adjustable-rate HECM it is the lender’s margin plus a 10-year index, as the federal definition explains.

A higher expected rate means a lower factor, because the balance is expected to grow faster. A lower expected rate means a higher factor. Here is how the main inputs push the number:

Because rates move, the same home and the same borrower can get a different principal limit a few weeks apart. Ask your lender when the expected rate on your loan will be set.

What Home Value Is Used in the Calculation?

HUD calls this number the maximum claim amount. It is the lowest of three figures: your home’s appraised value, the purchase price if you are buying a home with a HECM, or the national FHA lending limit for a one-family home.

For most homes, the appraisal is the deciding number. That’s why an FHA appraisal is part of every HECM, even if you had your home valued recently. If your home is worth more than the FHA limit, the extra value doesn’t raise your HECM principal limit.

FHA updates its lending limit each year, so check the current figure with your lender instead of relying on an old article. To see how equity and existing debt fit together, read how much equity you need for a reverse mortgage.

Example: How Your Home Value Turns Into Available Funds

The numbers below are made up to show the math. They are not a quote, and your factor would come from HUD’s table on the day your rate is set.

1. Home value: say your home appraises at $400,000, which is below the FHA limit.
2. Factor: say the HUD table gives a factor of 0.40 for your age and expected rate.
3. Principal limit: $400,000 × 0.40 = $160,000.
4. Existing mortgage: say you still owe $50,000. That payoff comes out of the principal limit first.
5. Before costs: about $110,000 remains, before any closing costs you finance and any required set-aside.

Your lender’s written estimate will list each of these lines for your situation. Comparing it to this simple layout makes the estimate easier to read.

How Much of Your Principal Limit Can You Take in the First Year?

HUD limits how much you can receive at closing and during the first 12 months. Under HUD’s Single Family Housing Policy Handbook 4000.1, the first-year limit is the greater of 60% of your principal limit or your required payoffs plus 10% of your principal limit.

Required payoffs, called mandatory obligations, include an existing mortgage and closing costs paid from the loan. In the illustration above, 60% of $160,000 is $96,000. The payoff plus 10% is $50,000 + $16,000 = $66,000. The larger number, $96,000, is the first-year limit, and the mortgage payoff and any financed costs count toward it.

After the first year, an adjustable-rate HECM can make the rest of the principal limit available. A fixed-rate HECM pays one lump sum at closing, so anything you don’t take then is not available later.

Does a Reverse Mortgage Principal Limit Grow Over Time?

Under HUD’s rules, the principal limit increases each month. It grows at the same rate as the loan balance: your interest rate plus the annual mortgage insurance premium (MIP).

With an adjustable-rate HECM line of credit, that growth applies to the part you haven’t used, so your available credit can increase over time. Draws reduce it, and the amount you borrow adds to your balance with interest. Learn more in our guide to the reverse mortgage line of credit.

With a fixed-rate HECM, the principal limit still grows on paper, but no more money can be drawn after closing.

What Can Reduce the Money You Actually Receive?

Several items can sit between your principal limit and the cash in your hands. Ask your lender to show each one in writing.

• Existing liens: any mortgage or home equity loan must be paid off.
• Financed closing costs: costs paid from the loan reduce what is left.
• Life expectancy set-aside: if the financial review requires it, part of the principal limit is held to pay property taxes and insurance.
• Repair set-aside: if the appraisal requires repairs after closing, money is reserved for them.

You also keep responsibilities after closing. You must pay property taxes, homeowners insurance, and any homeowners association (HOA) dues, and keep the home in good repair. The loan comes due when the last borrower sells, moves out for more than 12 months in a row, or passes away.

How Can You Estimate Your Reverse Mortgage Principal Limit?

Start with a rough estimate, then get the exact figures from a lender. A good first step is our reverse mortgage calculator, which gives a ballpark based on your age and home value.

1. Gather your home value estimate, your mortgage balance, and the birth date of the youngest borrower or spouse.
2. Meet with a HUD-approved counselor, which is required before any HECM. You can search HUD’s list of approved housing counselors.
3. Ask the lender which expected rate and factor they used, and when the rate will be locked.
4. Review the written estimate line by line against the steps in this article.

If something doesn’t add up, ask before you sign. Counselors and lenders can explain each number.

The Bottom Line

Your principal limit is the ceiling on what a HECM can provide. It comes from HUD’s factor table, which uses the youngest borrower’s age and the expected rate, multiplied by your home value up to the FHA limit. Payoffs, financed costs, set-asides, and the first-year limit then shape what you can actually receive.

To see a starting estimate, try South River Mortgage’s reverse mortgage calculator. For a personal review, call our reverse mortgage experts at 855-212-9114. No pressure. No obligation.