A letter of explanation is a short, formal document that addresses a specific concern raised by a lender, employer, or other institution. Whether you need to explain a gap in your employment history, a large bank deposit, or a late payment on your credit report, the goal is the same: state what happened, why it happened, and (when relevant) that the issue is resolved. Here’s how to write one that gets the job done.
When You’ll Need One
The most common scenario is during a mortgage application. Underwriters review your financial history closely, and anything that looks unusual will trigger a request. Large unexplained deposits, periods of unemployment, late payments, multiple recent credit inquiries, or gaps in your tax records can all prompt a lender to ask for a written explanation. You might also receive a gift from a family member to help with a down payment, which lenders want documented.
Outside of mortgages, employers sometimes ask for a letter of explanation during background checks or hiring. A gap on your resume, a discrepancy in your application, or a flagged item on a background screening can all lead to this request. The same basic principles apply regardless of who’s asking: be brief, be factual, and address only what was asked.
Format and Structure
A letter of explanation follows standard business letter formatting. At the top, include your street address, city, state, and zip code (skip your name here, since it appears in the closing). Below that, write the date with the month spelled out. Then add the recipient’s name, title, and address.
Open with a salutation using the recipient’s personal title and last name, followed by a colon. If you’re writing to a mortgage underwriter and don’t have a specific name, address it to the loan officer or underwriting department.
The body of the letter is where you do the actual explaining, and it should rarely exceed one page. Structure it in three parts:
- Opening sentence: State exactly what you’re explaining. Reference a loan number, application ID, or job title if applicable.
- Middle paragraph: Provide the facts. What happened, when it happened, and any relevant context. If the situation is resolved, say so and mention any supporting documents you’re attaching.
- Closing sentence: Offer to provide additional information if needed, and thank the reader for their time.
End with a professional closing like “Sincerely” or “Thank you,” leave space for your signature, then type your full name. If you’re submitting digitally, a typed name is fine.
Writing for a Mortgage Lender
Mortgage underwriters aren’t looking for a personal essay. They need to verify that a red flag in your financial history doesn’t represent an ongoing risk. Your letter should give them exactly enough information to check a box and move on.
Suppose you took eight months of unpaid leave to care for a family member. To the lender reviewing your bank statements, that looks like unemployment. A strong explanation might read: “From March through October 2024, I took unpaid family leave from [employer name] to care for an elderly parent. I returned to full-time employment in November 2024 and have enclosed pay stubs confirming my current income.” That’s it. No emotional backstory, no medical details.
For a large deposit, identify the source and amount: “The $12,000 deposit to my checking account on April 3, 2025, was a gift from my parents to assist with my down payment. I have attached a signed gift letter confirming that no repayment is expected.” If the deposit came from selling a car, closing another account, or receiving a tax refund, say so and attach whatever documentation supports it.
For late payments or derogatory marks on your credit report, acknowledge them directly. Explain the circumstance that caused the issue, note when it was resolved, and point to your current payment history as evidence it won’t recur. Lenders respond well to concrete timelines and documentation, not promises.
Writing for an Employer
Employment-related letters of explanation tend to be even shorter. If you’re addressing a career gap on a job application or in a cover letter, one or two sentences is the right length. Save the full story for the interview.
A gap of a few months generally doesn’t need explaining at all. Once a gap extends to a year or more, it’s wise to acknowledge it briefly and redirect attention to your qualifications. Good phrasing keeps things simple and forward-looking:
- Caretaking: “After taking time away from work to care for a family member, I’m eager to return to the workforce and am particularly drawn to this role because…”
- Layoff: “Following a company reorganization, my position was eliminated. I’m excited to bring my project management experience to your team.”
- Education or personal development: “I spent the past year completing a certification in [field], and I’m ready to apply those skills in a hands-on role.”
Avoid sharing personal medical information, relationship details, or anything that doesn’t directly explain the gap. Frame the time away in terms of growth, learning, or caregiving rather than hardship. Oversharing can work against you, and employers don’t need (or legally want) details about your personal life.
Tone and Language
The right tone is polite, direct, and professional. You’re not apologizing, and you’re not making a case before a jury. Think of it as answering a straightforward question from someone who simply needs the facts.
Use a neutral voice throughout. Emotional language, whether it’s frustration about being asked or excessive gratitude, undermines the letter’s credibility. A sentence like “I deeply regret this terrible mistake and promise it will never happen again” reads as insecure. A sentence like “The late payment in June 2023 resulted from a billing address error, which I corrected immediately” reads as competent.
Stick to what was actually asked. If a lender flags one large deposit, explain that deposit. Don’t volunteer information about your spending habits, other accounts, or unrelated financial history. Answering questions the reader never asked creates new concerns instead of resolving existing ones.
Before You Send It
Read the letter once for accuracy and once for grammar. Typos and misspellings in a letter meant to demonstrate reliability send exactly the wrong message. Double-check that any dates, dollar amounts, or account numbers you reference match your supporting documents.
Attach any documentation the recipient is likely to need. For mortgage letters, this could include pay stubs, bank statements, gift letters, or court documents. For employment letters, you might attach a certificate of completion, a reference letter, or proof of freelance work during the gap. The goal is to make it easy for the reader to verify what you’ve written without having to come back and ask for more.
If you’re submitting the letter as part of a larger application package, label the file clearly with your name and the purpose (for example, “Jane_Smith_LOE_Large_Deposit.pdf”). Keep a copy for your own records.
Sample Template
Here’s a general framework you can adapt to any situation:
[Your street address]
[City, State, ZIP]
[Date]
[Recipient name and title]
[Company or institution]
[Their address]
Dear [Mr./Ms. Last Name]:
I am writing to explain [the specific item or issue], as requested in connection with [loan number, application, or position title].
[One to three sentences describing what happened, when, and why. Include dates and amounts where relevant. Note any attached documentation.]
Please let me know if you need any additional information. Thank you for your time.
Sincerely,
[Your signature]
[Your printed name]