Conventional refinance: how to decide

Refinancing does not modify your existing mortgage. It pays that mortgage off with the proceeds of a new one. Everything that applied when you first borrowed applies again: income and asset documentation, a credit review, a property valuation in most cases, title work, and a closing.

This guide focuses on conforming conventional refinancing — conventional loans underwritten to Fannie Mae or Freddie Mac standards. Not all conventional mortgages conform to agency limits and guidelines; conventional also includes nonconforming loans such as jumbo financing, which follows individual investor or portfolio rules instead. The Fannie Mae discussion below pertains to conforming loans. Fannie Mae's Selling Guide treats refinances as distinct transaction types rather than one product — most relevantly, Limited Cash-Out Refinance Transactions (section B2-1.3-02) and Cash-Out Refinance Transactions (section B2-1.3-03). Which category a transaction falls into is determined by what the new loan proceeds are used for, not by what you call it.

Almost every refinance conversation is really about one of four goals. Naming yours first makes the rest of the decision much simpler, because the goals are evaluated differently.

If your goal is the fourth one, the mechanics and trade-offs differ enough that they are covered separately in the conventional cash-out refinance guide linked at the end of this page.

A refinance is underwritten on today's circumstances, not the ones you had when you bought. The factors that tend to move the outcome:

• Credit profile. Your current scores and recent history are pulled fresh. A profile that has improved since purchase can change what is available; one that has weakened can too.
• Income and employment. Stability and documentability matter more than a single strong year. Self-employment, commission, and recently changed employment usually require more documentation.
• Debt obligations. Car loans, student loans, and revolving balances taken on since purchase are reviewed again, even though your mortgage payment history is perfect. How a particular obligation is counted depends on program guidelines and documentation; some obligations may be treated differently or excluded under specific conditions.
• Property value and type. Current value drives loan-to-value. Condominiums, multi-unit properties, second homes, and investment properties are each reviewed differently from a single-unit primary residence.
• Occupancy. Whether you live in the property, use it seasonally, or rent it out changes how the transaction is treated.
• Reserves. Remaining liquid assets after closing can be part of the review, particularly for non-primary properties.

Documentation requirements depend on the program, the automated underwriting result, and your income type, so treat any list as a starting point rather than a fixed requirement. Commonly requested items include recent pay stubs, tax returns and W-2s or 1099s where self-employment or variable income applies, recent statements for accounts you will use for closing funds, your current mortgage statement, and your homeowners insurance and property tax details. Do not email sensitive documents to anyone; they belong in the lender's secure application system.

This guide does not advertise rates, prices, or fee amounts. What it can describe is the structure, so nothing on your Loan Estimate is a surprise.

This is the section most refinance pages leave out. A refinance frequently should not happen. Reasons to stay put:

• You may sell, move, or pay the loan off before you recover the transaction costs.
• Your existing rate is already competitive for your profile and the improvement would be marginal.
• You are far into your current amortization schedule and a fresh long term would undo that progress.
• Your mortgage insurance is close to ending on its own under your current loan's terms.
• Your income, employment, or credit situation is temporarily unsettled and would underwrite poorly today.
• The only motivation is a lower monthly payment achieved purely by stretching the term.

There is also a middle path people forget: paying additional principal on the loan you already have. Ask your servicer how to apply additional payments to principal, and confirm your loan terms, any prepayment restrictions or charges, and servicing instructions. Extra principal may reduce remaining interest and shorten repayment.

The useful mental model is simple. Estimate what the transaction costs you in total, estimate what it changes per month, and ask how many months of that change it takes to recover the cost. Then compare that number of months honestly against how long you expect to keep the loan.

1. Name the goal — rate, term, mortgage insurance, or cash — and confirm it is worth pursuing at all.
2. Estimate your current loan-to-value using a realistic value, not an optimistic one.
3. Talk with a licensed loan officer about what your scenario supports today.
4. Complete the application through the lender's secure system; the required Loan Estimate follows the application.
5. Review the Loan Estimate line by line, including how transaction costs are handled, before deciding to proceed.
6. Provide documentation; property valuation and title work take place.
7. Underwriting reviews the whole file and may request clarifications.
8. Closing, followed by the payoff of the existing loan.

• Comparing only the monthly payment between the old loan and the new one.
• Ignoring that a longer replacement term restarts amortization.
• Assuming mortgage insurance must be refinanced away when it may end on its own.
• Taking on new debt during the process, which can change qualification before closing.
• Treating a quoted rate as fixed before it is formally locked.
• Shopping only on rate while ignoring how costs are structured.

Myth: Any rate drop is worth refinancing for.

The rate change has to outrun the transaction costs over the time you actually keep the loan. A small improvement on a loan you will exit soon usually loses.

Myth: A no-cost refinance is free.

The costs are typically financed into the balance or reflected in the rate. Ask which, and by how much.

Myth: Refinancing is easier than the original purchase loan.

It is a full new underwrite. Some files are simpler; many are not, especially if income or debts have changed.