What actually happens during underwriting
The quiet stretch between offer and closing, explained step by step, with the requests that slow people down most.
Thomas Brennan, Branch Manager, Back BayAugust 12, 2026 · 6 min read
Once your offer is accepted and you apply, your file moves to underwriting. For many borrowers this is the most mysterious part of buying a home. You have handed over a stack of documents, and then someone you never meet decides whether the loan is approved. Here is what that person is actually doing, and how to keep things moving.
The three questions an underwriter answers
Underwriting comes down to three questions, sometimes called the three Cs. Every document request traces back to one of them.
- Capacity: can you afford the payment? The underwriter verifies income, employment and debts to confirm your debt-to-income ratio.
- Credit: have you managed debt responsibly? They review your credit report, explanations for late payments and any past bankruptcy or foreclosure.
- Collateral: is the home worth what you are paying, and is it in acceptable condition? The appraisal answers this.
Step by step
1. Automated findings
Your loan officer runs your application through Fannie Mae, Freddie Mac, FHA or VA automated systems. The findings list what must be verified. A strong file might need only one pay stub and one bank statement.
2. Document review
The underwriter compares documents against the application. Pay stubs must match stated income, bank statements must show enough funds to close and reserves, and any large deposit must be explained and sourced.
3. Appraisal and title
The appraiser inspects the home and compares recent sales. At the same time, your closing attorney orders a title search to make sure the seller can transfer clean ownership.
4. Conditional approval
Most files are approved with conditions, a short list of items still needed. This is normal. Typical conditions include an updated pay stub, a letter explaining a credit inquiry or a homeowners insurance binder.
5. Clear to close
Once conditions are satisfied, the file is cleared to close. Federal rules require that you receive your Closing Disclosure at least three business days before signing.
Most delays are not about approval. They are about waiting for a document the borrower did not know was needed.
The requests that slow people down
- Large deposits without a paper trail, such as cash gifts or transfers between accounts.
- Missing pages from bank statements, even blank ones.
- Recent job changes, especially to commission or bonus pay.
- New credit opened after application, including store cards at the furniture store.
- Condo documents from small associations that are slow to respond.
How Harborview keeps it fast
Our underwriters work in our Boston office, not in another time zone, and your loan officer can walk down the hall to resolve a question. We also offer upfront underwriting before you make an offer, so the heavy lifting is finished early. That is a big reason our average purchase closes in 24 days.
If you are in underwriting now, the most helpful thing you can do is respond to requests the same day, send full statements with every page, and call your loan officer before any financial change, even one that seems small.
Tom has financed homes from the South End to Beacon Hill since 2007 and still takes calls from clients he helped buy their first condo.
This article is for general education and is not financial, tax or legal advice. Figures are examples for illustration only.
