A non-interest-bearing principal balance is a portion of your mortgage that your lender has set aside from the active loan and parked without charging interest on it. You still owe the full amount, but it does not appear in your monthly payment and it does not grow over time. The tradeoff is that the entire deferred amount becomes due in a single lump sum when you sell the home, refinance, pay off the active balance, or reach the end of the loan term.
This arrangement almost always traces back to a hardship: a COVID-19 payment deferral, a loan modification, or an FHA partial claim. Whichever path put it on your account, the mechanics and the obligations that come with it are similar.
How the Split Works
When your lender creates a non-interest-bearing balance, your total debt is divided into two pieces. The first is the active, interest-bearing balance, which behaves like a normal mortgage. You make monthly payments that cover principal and interest on that portion. The second is the deferred balance, which sits on the lender’s books untouched. No interest accrues on it, and none of your regular payments reduce it.
The deferred amount is still legally secured by your home, either under your original mortgage or under the modified agreement. Interest is calculated only on the smaller active balance, which is why your monthly payment drops. If your total debt is $250,000 and $40,000 of it has been deferred, interest accrues on $210,000. At a 5% rate, that difference is roughly $167 per month.
Your monthly statement will typically show the active balance going down over time while the deferred balance stays frozen at its original number. The gap between what your statement displays as your “balance” and what you actually owe to pay the loan off in full can be substantial.
Why You Have One
Most non-interest-bearing balances come from one of a few programs, and the one that applies to you depends on who owns or insures your loan and what kind of hardship you went through.
The most common source today is a COVID-19 payment deferral. After forbearance ended, Fannie Mae and Freddie Mac both allowed servicers to move missed payments, including principal, interest, and escrow advances, to the back of the loan as a non-interest-bearing balance due at maturity, payoff, sale, or refinance.1Freddie Mac. COVID-19 Hardships: Seamlessly Transition After Forbearance2Fannie Mae. Loss Mitigation If you were in forbearance between 2020 and 2023 and resumed normal payments afterward, this is almost certainly where your deferred balance came from.
A Flex Modification from Fannie Mae or Freddie Mac can also create one. The servicer works through a sequence of steps, capitalizing past-due amounts, lowering the interest rate, extending the term, and if the payment is still too high, forbearing part of the principal. That forborne principal becomes a non-interest-bearing balance.3Fannie Mae. Flex Modification
If your loan is FHA-insured, you may have an FHA partial claim instead. A partial claim takes your past-due amounts and places them into a separate, interest-free subordinate lien held by HUD. You make no monthly payments on it. The balance comes due when you make your final mortgage payment, sell, refinance, or transfer title.4HUD.gov. FHA’s Loss Mitigation Program The structure is a second lien rather than a carve-out of your first mortgage, but what you owe and when you owe it look almost the same from your side.
If your deferred balance has been sitting on your account since the early 2010s, it probably came from the Home Affordable Modification Program (HAMP), a now-expired Treasury program that used principal forbearance to lower monthly payments.5Treasury.gov. Home Affordable Modification Program Guidelines A HAMP forbearance balance will stay on the loan until one of the standard triggers hits.
When You Have to Pay It
A non-interest-bearing balance is not forgiven debt. Fannie Mae’s servicing guide spells out that deferred amounts are “due and payable at maturity of the mortgage loan, or earlier upon the sale or transfer of the property, refinance of the mortgage loan, or payoff of the interest-bearing UPB.”6Fannie Mae. Payment Deferral Freddie Mac uses the same language.1Freddie Mac. COVID-19 Hardships: Seamlessly Transition After Forbearance FHA partial claims follow the same pattern.
In practical terms, four events trigger repayment:
- Selling or transferring the property. At closing, the title company will identify the deferred balance and pay it from the sale proceeds before any equity reaches you.
- Refinancing. A refinance pays off your existing loan in full, which includes the deferred portion. The amount effectively becomes a balloon payment at the refinance closing.
- Paying off the active balance. Even without a formal refinance, if you pay off the interest-bearing portion ahead of schedule, the deferred amount comes due at the same time.
- Loan maturity. When your mortgage reaches its final scheduled payment date, the deferred balance is due as a lump sum. For a loan modified early in a 30-year term, that date may be far off. For an older loan, it may be closer than you think.
What It Means for Your Equity
This is where homeowners get caught off guard. Your real equity is the home’s market value minus both the active balance and the deferred balance, not just the active balance.
Say your home is worth $320,000, your active balance is $220,000, and you have a $35,000 non-interest-bearing deferred balance. The equity figure that looks like $100,000 on a quick calculation is actually closer to $65,000 once the deferral is paid off at closing. Add real estate commissions and closing costs, and it shrinks further.
Before you list the home, request a payoff statement from your servicer. That statement is the only document that includes both balances calculated to a specific date, and it will tell you what you actually owe. If the home’s value has fallen and the sale will not cover both balances, you may face a shortfall. Whether the lender can pursue you for the difference depends on whether your loan is recourse or nonrecourse and on your state’s deficiency rules, which is worth running past an attorney before you agree to a sale at a loss.
Credit and Tax Effects
The deferred balance by itself does not hurt your credit score. Any damage usually happened earlier, when the missed payments that led to the modification or deferral were reported. Once the arrangement is in place and you make on-time payments on the active balance, the account should report as current.
The deferred amount still shows up on your credit report as part of your total mortgage debt. Lenders considering you for new credit will see it, and some will include it in debt-to-income calculations even though you make no monthly payment on it.
On taxes, moving part of your principal into a non-interest-bearing bucket is not a taxable event. Nothing has been forgiven, so there is nothing to report. Your Form 1098 will continue to show the full outstanding principal, and your deductible interest is based on what you actually paid on the active balance.
The tax picture only changes if the deferred balance is ever forgiven, which rarely happens voluntarily. Canceled debt is generally treated as taxable ordinary income. The federal exclusion for canceled qualified principal residence indebtedness applies only to debt discharged before January 1, 2026, or discharged under a written arrangement entered into before that date.7Internal Revenue Service. Topic No. 431, Canceled Debt – Is It Taxable or Not? If you receive a Form 1099-C showing canceled debt from a short sale, settlement, or forgiveness provision in an older modification, talk to a tax professional before you file.
Find Out Exactly What You Owe
Pull out your modification agreement, deferral paperwork, or partial claim documents and read them. They state the exact deferred amount, the events that make it due, and any conditions that could change the arrangement. If you cannot find your copies, your servicer is required to provide them on request.
Look specifically for whether the agreement allows the deferred balance to be re-amortized or modified again if you hit another hardship. Some agreements are rigid. Others leave room for additional loss mitigation.
Then request a current payoff statement, and do it again before any significant decision involving the home. Your monthly mortgage statement is not enough. The payoff statement is the document that reflects your complete obligation, and the gap between the two can run into tens of thousands of dollars. Finding that out at the closing table is the one scenario worth planning hard to avoid.