To explain late payments on a mortgage application, you write a short letter of explanation that ties each delinquency on your credit report to a specific event, shows when the problem started and ended, and attaches documents that prove what you say. Underwriters are not looking for an apology. They are looking for evidence that the missed payments came from a one-time disruption you have already moved past, and that your loan program’s rules still allow the file to move forward.
Know Whether Your Loan Program Can Absorb the Lates
Before you write anything, find out how much room your loan program gives you. Each program handles past-due payments differently, and some limits are hard stops that no letter can overcome.
FHA
FHA runs applications through an automated system called TOTAL Mortgage Scorecard. If any mortgage account shows certain patterns in the 12 months before your case number was assigned, the file gets downgraded to manual underwriting, where a human reviewer reads your explanation and documents before deciding. Those triggers are:1U.S. Department of Housing and Urban Development. FHA Single Family Housing Policy Handbook 4000.1
- Three or more payments more than 30 days late
- One or more 60-day late payments together with one or more 30-day late payments
- One payment more than 90 days late
A manual review is not a denial. It just means your letter matters more.2U.S. Department of Housing and Urban Development. FHA Underwriting Guidelines for Borrowers With Previous Mortgage Payment Forbearance
Conventional (Fannie Mae)
Fannie Mae is stricter. It treats a prior mortgage payment history as “excessive” and ineligible for purchase if any mortgage account shows one or more payments that were 60, 90, 120, or 150 days late within the 12 months before the credit report date.3Fannie Mae. Previous Mortgage Payment History A single 60-day late mortgage payment in the past year can block a conventional loan on its own, no matter how good the explanation is.
VA
VA underwriters look at the most recent 12 months and expect any late payments in that window to be developed with an explanation and documentation. There is no rigid pass-or-fail threshold. If you have been paying on time for at least 12 months after a period of delinquency, underwriters generally treat that as a positive factor.4VA Home Loans. VA Credit Standards – Satisfactory Payment History
What Underwriters Accept as a Reason
Not every hardship counts. Fannie Mae defines extenuating circumstances as “nonrecurring events that are beyond the borrower’s control that result in a sudden, significant, and prolonged reduction in income or a catastrophic increase in financial obligations.”5Fannie Mae. Extenuating Circumstances for Derogatory Credit Other programs apply a similar test. The event has to be unexpected, outside your control, and temporary.
Job Loss
A layoff or company closure is one of the most commonly accepted reasons. A termination letter, severance agreement, or unemployment benefit statement establishes what happened and when. Repeated job losses are harder to explain because the pattern looks recurring rather than isolated.
Medical and Family Emergencies
A serious illness, injury, or hospitalization qualifies when it caused a sudden loss of income or an unexpected spike in expenses, whether it happened to you or a dependent. Medical bills, insurance claim summaries, or a doctor’s statement showing treatment dates connect the health event to the missed payments. The death of a spouse or family member who contributed to household income is another accepted scenario if you can show how the loss disrupted your finances.
Natural Disasters
A federally declared disaster that damaged your home or interrupted your income is generally treated as a strong extenuating circumstance. Borrowers with mortgages backed by Fannie Mae or Freddie Mac who are affected by a natural disaster may be eligible for a forbearance plan that pauses monthly payments, suspends late fees, and halts foreclosure while it is in place.6Federal Housing Finance Agency. Disaster Assistance If you used disaster forbearance, include the servicer’s confirmation letter and any FEMA documentation.
Write the Letter
The letter is short, factual, and specific. Vague or emotional language weakens it. Dates, dollar amounts, and matched documents strengthen it.
Pull Your Credit Report First
Before you write, get your credit report and list every late payment the underwriter will see: creditor name, account number, and the month and year of each delinquency. Cross-check those entries against your bank statements and billing records. If any entry does not match your records, you may be dealing with a reporting error rather than a payment you need to explain.
Structure
Put a header at the top with your full legal name, the loan application number, and the date. Address the letter to the underwriter or loan officer by name if you have it. Then give each late payment its own short paragraph covering three things:
- The event that caused it (layoff, hospitalization, disaster, or other qualifying circumstance)
- The timeline: when the event started, which specific payments were affected, and when the situation resolved
- The resolution: that the account is now current or paid in full, and what has changed to prevent a recurrence (new job, recovered health, rebuilt savings)
Keep it to one page if you can. Every claim should be backed by a document in the package. Skip blame and excuses; underwriters respond to plain facts.
Documents to Attach
Your letter is only as strong as the evidence behind it. Fannie Mae requires both documents confirming the event itself and documents showing why you could not resolve the problem sooner, such as insurance papers, tax returns, or lease agreements.5Fannie Mae. Extenuating Circumstances for Derogatory Credit Match each document to a specific late payment. If you missed a payment in March 2024 after a February 2024 layoff, the termination letter should sit next to that entry in your package so the dates line up on the page.
If the Late Payment Is Actually Wrong
Sometimes the entry on your credit report is inaccurate. The creditor reported it incorrectly, or a payment was applied to the wrong account. You have the right to dispute it directly with the credit reporting agency, and under federal law the agency must investigate and correct or delete any information it cannot verify, typically within 30 days.7Office of the Law Revision Counsel. United States Code Title 15 Section 1681i – Procedure in Case of Disputed Accuracy That window can be extended by up to 15 additional days if you submit new information during the investigation.
File the dispute with each credit bureau showing the error (Equifax, Experian, or TransUnion) and send documentation that the payment was made on time, such as a bank statement showing the cleared payment or a confirmation email from the creditor. If the correction comes through before closing, ask your loan officer about a rapid rescore, a service lenders can buy from the credit bureaus to update the report in a few days rather than waiting for the next reporting cycle.
If the dispute will not finish in time, write the letter anyway. Say that you are actively disputing the entry, attach the dispute confirmation, and include your proof of on-time payment. The underwriter can weigh that evidence against the report.
Submit the Package and What Happens Next
Most lenders use secure online portals where you upload the letter and supporting documents directly into the loan file. If yours does not, send the package by certified mail with return receipt so you have proof of delivery. Either way, email your loan officer to confirm receipt and ask whether anything else is needed.
Once the underwriter has your explanation, you may get a conditional approval noting that the requirement is satisfied, or a request for more information if gaps remain. Under the Equal Credit Opportunity Act, the lender must notify you of its decision — approval, counteroffer, or denial — within 30 days of receiving your completed application.8Office of the Law Revision Counsel. United States Code Title 15 Section 1691 – Scope of Prohibition A denial notice must state the specific reasons or tell you how to request them, which gives you a starting point for the next application: paying down a balance, letting older delinquencies age further, or correcting a reporting error before you try again.