Refinancing means replacing your existing loan with a new one — typically to lower your interest rate, change your loan term, switch from an adjustable to a fixed rate, access equity as cash, or remove PMI. The new lender pays off your old loan in full at closing, and you begin making payments to the new lender under the new terms. The process mirrors your original mortgage: you apply, provide income documentation, the property is appraised (sometimes), and you pay closing costs at the close of the new loan. The key distinction from a purchase is that you're not moving — it's purely a financial transaction to replace one loan with better terms.

As of March 12, 2026, the national average 30-year fixed refinance rate is 6.69% APR (Bankrate) and the 15-year fixed is 5.22% APR. A "good" rate depends entirely on what you currently have. If your mortgage is at 7.5–8.5% (common for loans originated in 2023–2024), today's market offers meaningful savings. If your rate is 3.0–4.5% (from 2020–2022), today's rates are still significantly higher — refinancing would increase your rate and is unlikely to be beneficial for a standard rate-and-term refi. The relevant question isn't just the absolute rate, but the difference between your current rate and today's market rate, combined with your break-even timeline.

Refinancing closing costs typically run 2–6% of the loan amount, though many lenders advertise "no-closing-cost" options that roll fees into the rate. On a $300,000 refinance, expect $6,000–$18,000 in closing costs including origination fees (0.5–1% of loan), appraisal ($400–$700), title insurance ($500–$1,500), recording fees ($50–$250), prepaid interest, and escrow setup. You can either pay these upfront (preserving a lower rate) or roll them into the new loan balance (easier upfront but you pay interest on the fees for the full term). A no-closing-cost option where the lender raises your rate by 0.25–0.375% to absorb fees is only better mathematically if you sell or refinance again before the break-even point on the fee absorption.

A standard mortgage refinance typically takes 30–60 days from application to closing, though some lenders achieve 20–30 days in favorable conditions. FHA Streamline and VA IRRRL refinances (which don't require income verification or a new appraisal) can close in as few as 14–21 days. The timeline is primarily driven by: the appraisal schedule in your market, how quickly you submit documentation, and the lender's current workload. To speed up the process: choose a lender with a good processing track record, submit all documents (pay stubs, W-2s, bank statements, current mortgage statement) within 24 hours of request, and respond to lender requests same-day.

Refinancing causes a temporary credit score dip of approximately 5–15 points from the hard inquiry and new account opening. This typically recovers within 6–12 months as the new account ages and you build on-time payment history. If you're shopping multiple lenders, all mortgage-related hard inquiries within a 14-to-45-day window are counted as a single inquiry by FICO, so compare quotes aggressively within that window. The long-term credit impact of refinancing is minimal, and the financial savings from a well-timed refinance far outweigh the temporary score impact for most borrowers.

A 15-year refinance at today's rate (~5.22%) saves enormously on total interest compared to a 30-year (~6.69%), but increases the monthly payment significantly. On a $300,000 refinance: the 30-year payment is approximately $1,960/month with $406,000 total interest; the 15-year payment is approximately $2,390/month with $130,000 total interest — saving $276,000 in interest but costing $430 more per month. Choose the 15-year if your budget comfortably handles the higher payment and you want to build equity and eliminate the mortgage sooner. Choose the 30-year if cash flow is your priority, you plan to move or refinance again within 7–10 years, or you'd invest the monthly difference in assets with higher expected returns. The Break-Even mode in the calculator models both simultaneously.

Conventional refinances typically require a minimum credit score of 620, though below 680 the rate premiums can be substantial. For the best advertised rates, aim for 740 or above. FHA refinances allow scores as low as 580 (though 600+ is more practical). VA IRRRL refinances don't require a minimum credit score for most lenders. The difference in rate between a 680 score and a 760 score can be 0.5–1.25% on a conventional refinance — on a $300,000 loan over 30 years, that's $32,000–$90,000 in extra interest. If your score is below 720, spending 3–6 months improving it before applying is often worth more than any particular rate environment.

For conventional loans, there is no mandatory waiting period to refinance — you can apply immediately after closing if rates drop significantly. However, most lenders have a "seasoning" requirement of 6–12 months before they'll refinance a loan they originated (though you can refinance with a different lender sooner). FHA Streamline refinances require 210 days (7 months) from your first payment and at least 6 payments made. VA IRRRL requires 210 days and 6 payments. Cash-out refinances typically require 6–12 months of seasoning on conventional loans and 12 months on FHA/VA. Practically, refinancing within 1 year of purchase is unusual unless rates have dropped dramatically, since closing costs from the purchase are still fresh and closing costs for the refi add another layer of expense to recoup.

A no-closing-cost refinance is one where the lender absorbs all closing costs in exchange for a slightly higher interest rate — typically 0.25–0.75% above what you'd pay with closing costs. The appeal is obvious: no money out of pocket at closing. Whether it's worth it depends entirely on how long you keep the loan. If you stay past the break-even point of a traditional refinance, you'll pay more with the no-closing-cost option because the rate is higher. If you sell or refinance again before that break-even, the no-closing-cost option wins because you avoided upfront fees you never fully recovered. For most homeowners planning to stay 5+ years, paying closing costs and getting a lower rate is the better financial decision. For those likely to move within 2–3 years, no-closing-cost can make sense.

Refinancing with a home that has declined in value is challenging because a lower appraised value pushes your LTV higher — potentially above the lender's threshold. For conventional loans, most lenders require LTV below 97% (with PMI) or 80% (without PMI) for the best rates. If your LTV exceeds 95–97%, most conventional refinances are unavailable. However, there are programs designed for underwater or low-equity situations: the FHA Streamline Refinance doesn't require an appraisal and can proceed regardless of current value (if you already have an FHA loan); the VA IRRRL similarly requires no appraisal; and some lenders offer Fannie Mae's RefiNow program for borrowers at or below 80% AMI with LTV up to 97%. Check with your servicer first if you believe your home's value has dropped since purchase.