Refinance vs HELOC: Which Saves You More?

How a Rate-and-Term Refinance Works

A rate-and-term refinance replaces your existing mortgage with a new one — different rate, different term, or both. You’re not taking cash out. The new loan pays off the old loan, and you start fresh with a new payment schedule. If you locked in at 7.25% two years ago and rates have dropped to 6%, refinancing saves real money. On a $350,000 balance, that 1.25% rate drop cuts your monthly payment by roughly $300 and saves over $100,000 in total interest over 30 years.

Closing costs run 2-5% of the loan amount — typically $7,000-$17,500 on a $350,000 refinance. That includes origination fees, appraisal ($400-$700), title insurance ($1,000-$2,000), and recording fees. You can roll these into the new loan balance, but that means you’re borrowing more and paying interest on the closing costs for 30 years. The smarter move is paying closing costs out of pocket if you have the cash. Use our refinance calculator to find your break-even point — the month when cumulative payment savings exceed the closing costs.

The break-even calculation determines whether refinancing makes sense. If closing costs are $10,000 and you save $300/month, break-even is 33 months. If you plan to stay in the home at least 3 more years, the refinance pays off. If you might sell in 18 months, you’ll lose money. Term changes add another dimension: switching from a 30-year to a 15-year raises your payment but drops your rate by 0.5-0.75% and saves massive interest. On $350,000 at 6%, a 15-year mortgage costs $2,953/month but saves $200,000+ in total interest compared to 30 years.

How a HELOC Works

A HELOC is a revolving line of credit secured by your home equity. It sits behind your existing mortgage as a second lien. You keep your current mortgage untouched — same rate, same payment, same term — and open a separate credit line you can draw from as needed. If your home is worth $450,000 and you owe $280,000, most lenders will offer a HELOC up to 80-85% of value minus your balance: $82,000-$102,500.

HELOC rates are variable, pegged to the prime rate plus a margin. In early 2026, most HELOCs carry rates of 8-9.5% — significantly higher than first mortgage rates. The draw period lasts 10 years, during which you make interest-only payments on whatever you’ve borrowed. After that, a 10-20 year repayment period begins where you pay both principal and interest with no more borrowing. Closing costs are minimal — often $0-$500 — making HELOCs cheap to set up even if you never use the full line.

The flexibility is the key selling point. You can draw $5,000 for a roof repair in March, repay it by June, then draw $15,000 for a bathroom remodel in September. You only pay interest on what you’ve borrowed. If you open a $100,000 HELOC and only use $20,000, your payment is based on $20,000. This makes HELOCs ideal for ongoing or unpredictable expenses where you don’t need a lump sum all at once. Run the numbers on our HELOC calculator to see what your interest costs look like at different draw levels.

Key Differences Between Refinancing and a HELOC

The fundamental question is: what are you trying to accomplish? A refinance changes your primary mortgage — lower rate, shorter term, or both. A HELOC leaves your mortgage alone and opens a separate credit line. If your goal is reducing your monthly mortgage payment or total interest cost, refinance. If your goal is accessing cash for a specific purpose while keeping your existing (potentially low-rate) mortgage intact, HELOC.

Rate environment drives the decision more than anything else. If your current mortgage rate is 3.5% from 2021 and today’s rates are 6%, a refinance destroys your rate advantage. You’d replace a cheap mortgage with an expensive one. But a HELOC at 8.5% on $50,000 costs $354/month in interest — far less than the thousands per month you’d add by refinancing your entire $300,000 balance from 3.5% to 6%. In a higher-rate environment, HELOCs preserve your existing low rate on the bulk of your debt while giving you access to equity at a higher rate on a smaller amount.

When rates drop below your current mortgage, the math flips. If you’re at 7% and can refinance to 5.75%, the refinance lowers your payment on every dollar of your mortgage. A HELOC adds debt at 8.5% on top of your already-expensive 7% mortgage. Refinancing replaces the expensive debt; a HELOC adds more expensive debt. Check current mortgage rates to see where they stand relative to your existing loan.

Total cost comparison on a concrete example: You owe $300,000 at 7% and need $50,000 for home improvements. Option A: cash-out refinance to $350,000 at 6.25% — new payment $2,155/month, total interest over 30 years $425,800. Option B: keep the $300,000 at 7% ($1,996/month) plus a $50,000 HELOC at 8.5% ($354/month interest-only) — combined payment $2,350/month, but the HELOC gets repaid in 5-7 years while the mortgage keeps its original payoff date. Over 10 years, Option B costs less if you repay the HELOC within 6 years. Over 30 years, Option A costs less because you locked the entire balance at a lower rate.

When to Choose a Refinance

Refinance when you can drop your rate by at least 0.75-1% and plan to stay in the home long enough to break even on closing costs. The old rule was “refinance if you can save 1%,” but closing costs have increased enough that 0.75% savings with a 3+ year horizon still works. A rate drop from 7.25% to 6.25% on $350,000 saves $250/month. With $12,000 in closing costs, you break even in 48 months. If you’re staying 5+ years, refinance every time.

Also refinance when you want to shorten your term. If you’ve had your 30-year mortgage for 5 years and can afford higher payments, refinancing into a 20-year or 15-year mortgage at a lower rate accelerates your payoff dramatically. You build equity faster, pay far less total interest, and own the home free and clear sooner. On $320,000 remaining at 6%, switching from 25 years remaining to a 15-year at 5.5% raises your payment by $350/month but saves $145,000 in total interest. Use our mortgage calculator to compare term options.

When to Choose a HELOC

Choose a HELOC when your current mortgage rate is below today’s rates. If you locked in at 3-4% during 2020-2021, a refinance would cost you that rate on your entire balance. A HELOC lets you borrow at 8-9.5% on just the amount you need while keeping your ultra-low rate on the primary mortgage. On $300,000 at 3.25%, your current payment is $1,306/month. Refinancing to 6.25% on $350,000 (including $50,000 cash out) raises it to $2,155/month — an $849/month increase. A $50,000 HELOC at 8.5% adds only $354/month. The HELOC saves $495/month despite its higher rate because it only applies to the $50,000, not the full balance.

HELOCs also win when you need money in phases rather than all at once. Home renovation projects often span months. A $60,000 kitchen remodel might need $15,000 for demolition and cabinets in month one, $20,000 for countertops and appliances in month two, and $25,000 for finishes in month three. A HELOC lets you draw as needed and only pay interest on what you’ve used. A cash-out refinance gives you $60,000 upfront, and you pay interest on the full amount from day one — even if $40,000 sits in your checking account for two months. Check our home services hub for renovation planning resources.

Common Mistakes

Refinancing a low-rate mortgage just to get cash. If you’re sitting on a 3.25% rate from 2021, don’t touch it. A cash-out refinance replaces that rate with today’s 6-7% rate on your entire balance. The interest cost increase on the existing $300,000 dwarfs whatever you gain from the $50,000 cash out. Use a HELOC, personal loan, or even a 0% intro-rate credit card before you sacrifice a sub-4% mortgage. That rate is an asset — protect it.

Ignoring the HELOC repayment phase. Interest-only payments feel manageable during the 10-year draw period. Then repayment begins, and your $400/month HELOC payment jumps to $800-$1,000/month as principal repayment kicks in. If you’re planning to retire during the repayment phase, make sure your retirement income handles that jump. Better yet, pay down principal during the draw period so the transition is gradual.

Rolling refinance closing costs into the loan. Adding $12,000 in closing costs to a $350,000 loan means you’re borrowing $362,000 and paying interest on those closing costs for 30 years. That $12,000 turns into roughly $20,000-$22,000 in total cost with interest. If you have the cash, pay closing costs out of pocket. Your break-even timeline improves by 6-12 months and your long-term savings increase.

Treating a HELOC like free money. The variable rate means your payment fluctuates with prime rate changes. A $50,000 HELOC at 8% costs $333/month in interest. If rates rise to 10%, that jumps to $417/month. And unlike a fixed-rate mortgage, there’s no cap on how high HELOC rates can go. Don’t draw more than you can comfortably repay at a rate 2-3% higher than today’s.

Serial refinancing every time rates dip. Each refinance costs $7,000-$17,000 in closing costs. Refinancing three times in 8 years could cost $30,000-$50,000 in fees. Each refi also resets your amortization clock — you go back to paying mostly interest for the first several years. Unless each refinance clears the break-even threshold before the next one, you’re spending more on fees than you’re saving on rate reductions.

Frequently Asked Questions

How much equity do I need for a HELOC?

Most lenders require at least 15-20% equity after accounting for both your mortgage and the HELOC. On a $400,000 home, that means your combined mortgage balance plus HELOC can’t exceed $320,000-$340,000. If you owe $290,000, you could access a HELOC of $30,000-$50,000. Some lenders allow combined loan-to-value ratios up to 90%, but these carry higher rates and stricter credit requirements.

Can I refinance if I already have a HELOC?

Yes, but the HELOC lender must agree to “subordinate” — meaning they accept second-lien position behind your new first mortgage. Most HELOC lenders will subordinate if you’re not increasing your first mortgage balance significantly. If they won’t subordinate, you can pay off the HELOC at closing from the refinance proceeds, effectively rolling it into the new mortgage. Use our affordability calculator to check your total debt capacity.

Are HELOC interest payments tax-deductible?

Only if you use the funds for home improvements. Under current tax law, HELOC interest is deductible when the money goes toward buying, building, or substantially improving the home securing the loan. Using a HELOC for debt consolidation, tuition, or a car purchase? That interest isn’t deductible. Keep records of how you spend HELOC funds — the IRS can ask for documentation.

What’s the minimum rate drop that makes refinancing worth it?

It depends on your loan balance and how long you’ll keep the loan. As a rough guide: 0.5% savings on a $400,000+ balance with 7+ years of holding is borderline worth it. 0.75% savings with 5+ years is usually worth it. 1%+ savings is almost always worth it. The real test is the break-even calculation: closing costs divided by monthly savings. If break-even is under 36 months and you’re staying 5+ years, refinance.

Can I have a HELOC with a variable-rate mortgage?

You can, but it’s risky. Both your primary mortgage and HELOC rates float with the market. If rates spike, both payments increase simultaneously. On a $300,000 ARM and a $50,000 HELOC, a 2% rate increase adds roughly $600-$700/month to your combined payments. If your primary mortgage is variable, consider refinancing into a fixed rate before opening a HELOC. Having one fixed and one variable is more manageable than two variables.

Does a refinance reset my loan term to 30 years?

Only if you choose a 30-year term. You can refinance into any term — 30, 25, 20, 15, or even 10 years. If you’ve had your mortgage for 7 years and refinance into a 23-year term, you maintain roughly the same payoff timeline at a lower rate. Most borrowers default to 30 years for the lower payment, but that extends your payoff and increases total interest. Ask your lender about non-standard terms that match your original payoff date.

What credit score do I need for a refinance vs a HELOC?

Both typically require 680+ for competitive rates. Below 700, your options narrow and rates increase. A refinance at 660 credit score might cost 0.5-1% more in rate than one at 740+. HELOCs below 680 are harder to find — many lenders set 700 as their minimum. If your score is borderline, spend 3-6 months improving it before applying. Paying down credit card balances to under 30% utilization can boost your score 20-40 points and save thousands in interest over the life of either product.