Refinance Calculator

Most refinance advice boils down to "if rates drop, refinance." That is dangerously incomplete. A refinance calculator only tells you half the story if it stops at the new payment. The other half is the break-even timeline, the amortization reset, and the total interest over the life of the loan. Plenty of borrowers have "saved" $200 a month on paper while adding $40,000 in lifetime interest because nobody showed them the full picture. This tool shows the full picture.

The break-even calculation is the only number that matters

Every refinance has a cost. Origination fees, appraisal, title insurance, prepaid interest. Those costs need to be recouped through monthly savings before you actually start saving money. The formula is dead simple:

Say you owe $280,000 at 7.25% with 27 years remaining. You can refinance to 6.0% on a new 30-year term with $5,600 in closing costs. Your payment drops from roughly $1,910 to $1,679, saving $231 per month. Divide $5,600 by $231 and your break-even is 24 months. If you hold the property longer than 2 years, you come out ahead. If you sell in 18 months, you just paid $5,600 for the privilege of a slightly lower payment.

The sweet spot for most refinances is a break-even under 36 months. Under 24 months is strong. Over 48 months and you should think hard about whether your plans for the property actually extend that far.

Rate-and-term refi vs. cash-out refi

These are two different financial moves that happen to share the same paperwork. Confusing them leads to bad decisions.

A rate-and-term refinance replaces your current mortgage with a new one at a better rate, a different term, or both. Your loan balance stays the same (plus rolled-in closing costs if you choose). The goal is to lower your cost of borrowing.

A cash-out refinance gives you a new loan that is larger than your current balance. You receive the difference as cash. On a property worth $400,000 with a $260,000 balance, a 75% LTV cash-out refi puts $40,000 in your pocket (minus closing costs). You now owe $300,000. That is not savings. That is new debt. The cash-out refi calculator handles the DSCR math on that scenario specifically.

Cash-out refis carry higher rates, typically 0.25% to 0.50% above rate-and-term pricing. Lenders view them as riskier because you are increasing your leverage, not decreasing it. For investment properties, expect even tighter terms: most lenders cap cash-out LTV at 70% to 75% on rentals, and some require 12 months of seasoning since your last purchase or refinance.

The "2% rule" is outdated. Ignore it.

An old rule of thumb says you should only refinance if you can drop your rate by at least 2 percentage points. That rule comes from an era when closing costs were proportionally higher and interest rates were in the teens. In 2026, with rates in the 6% to 7% range, a 2-point drop would mean refinancing from 7% to 5%, which is not happening in the current market.

What actually matters is the break-even period relative to your holding timeline. On a $300,000 loan balance:

• A 0.50% rate drop saves roughly $95/month. With $5,500 in closing costs, break-even is 58 months. That works if you are holding long-term, not if you plan to sell in 3 years.
• A 1.00% rate drop saves roughly $190/month. Break-even is 29 months. Solid for most borrowers.
• A 1.50% rate drop saves roughly $280/month. Break-even is 20 months. Do this immediately.

The rate drop matters less than the dollar savings relative to the costs. A 0.75% drop on a $500,000 balance saves more per month than a 1.25% drop on a $200,000 balance. Do the math, not the rule of thumb.

Hidden costs that inflate your closing bill

Refinancing is not free, and the costs are not always obvious upfront. Here is what actually shows up on the settlement statement:

On a $280,000 refinance, these costs total $4,200 to $8,400 depending on your lender and state. The origination fee and title insurance are the two largest line items. Both are shoppable. The closing costs calculator breaks down each fee in detail.

The amortization trap: how refinancing can cost you money

This is the part that gets glossed over in every "should I refinance?" article. When you refinance into a new 30-year loan, you reset the amortization clock. That means you go back to paying mostly interest in the early years of the new loan.

Here is a real example. You bought a property in Houston, Texas for $350,000 with a $280,000 mortgage at 7.25%, 30-year fixed. Three years in, your balance is roughly $272,500. You have paid about $60,000 in interest and $8,800 in principal. Now you refinance to 6.0% on a new 30-year term.

• Old loan remaining interest (27 years left): approximately $348,000
• New loan total interest (30 years at 6.0%): approximately $315,600
• Result: a 1.25% rate drop is large enough that the new 30-year loan saves $32,000 in total interest even with 3 extra years of payments

That looks like a clear win. But shrink the rate drop and the math flips. At 6.75% (only 0.50% lower), the new 30-year loan costs $364,000 in total interest, $16,000 more than keeping the old loan. Your monthly payment drops, but the 3 extra years of payments eat the savings. That is the amortization trap: a small rate drop plus a term reset can cost you money.

The fix: refinance into a shorter term. A 25-year loan at 6.0% on that $272,500 balance gives you a payment of roughly $1,756, still $154/month lower than the old loan, and you pay off the mortgage on the same timeline. Total interest drops to about $254,300, saving you over $93,000 compared to keeping the original loan. That is the real refinance win.

Rental property refinancing: different rules apply

Refinancing a rental property is not the same as refinancing your primary residence. The differences matter, and they all work against you:

• Higher rates. Investment property rates run 0.375% to 0.75% above primary residence rates. In mid-2026, that means 6.25% to 6.75% if primary residence rates are in the 5.75% to 6.0% range.
• Lower LTV limits. Most conventional lenders cap rate-and-term refis at 75% LTV for investment properties. Cash-out refis drop to 70% to 75%. Compare that to 80% to 95% LTV for a primary residence.
• Seasoning requirements. Many lenders require 6 to 12 months between your purchase and a refinance. DSCR lenders sometimes require a full 12-month seasoning period to use the appraised value instead of the purchase price. If you bought, rehabbed, and want to refi in 4 months, your lender options narrow significantly.
• Reserves. Expect to show 6 months of PITI (principal, interest, taxes, insurance) in liquid reserves for each financed property. On a portfolio of 5 rentals with $1,800/month PITI each, that is $54,000 sitting in a bank account.
• DSCR qualification.DSCR loans skip personal income verification and qualify based on the property's rental income alone. Most lenders want a DSCR of 1.0 or higher (rent covers the full payment). A property renting for $2,100/month with a proposed payment of $1,950 has a 1.08 DSCR, which passes at most lenders.

For investors doing a BRRRR strategy in markets like Memphis, Tennessee or Cleveland, Ohio, the refinance step is the whole point. You buy distressed, rehab, stabilize with a tenant, then refinance to pull your capital back out. The seasoning requirement is the bottleneck. Six months is manageable. Twelve months ties up capital that could have cycled into the next deal.

2026 rate environment: where things stand

After the aggressive rate hikes of 2022 to 2023, mortgage rates have settled into a range. As of mid-2026, 30-year fixed rates for primary residences sit around 5.75% to 6.25%. Investment property rates are 6.25% to 7.0% depending on LTV, credit score, and loan type.

If you locked in at 7.0% to 7.5% in late 2023 or early 2024, a refinance into the low 6% range starts to make mathematical sense, especially on larger balances. On a $350,000 balance, dropping from 7.25% to 6.0% saves $290/month. On a $200,000 balance, the same rate drop saves $165/month. The bigger the balance, the more a rate drop moves the needle.

Borrowers in Dallas, Texas and Phoenix, Arizona who purchased in the 2023 rate peak are prime candidates. Property values in both metros have held steady or appreciated 3% to 5% since purchase, which helps with the appraisal. Investors in markets like Indianapolis, Indiana and Jacksonville, Florida with stabilized rentals are seeing DSCR refis pencil out as rates tick lower and rents hold firm.

Worked example: 7.25% to 6.0% on a $280,000 balance

Let us walk through a specific scenario. You purchased a rental property in Charlotte, North Carolina for $350,000 three years ago. Original mortgage: $280,000 at 7.25%, 30-year fixed. Current balance: $272,500. The property now appraises at $370,000.

The 30-year refi gives you the biggest monthly cash flow improvement ($276/month) and saves $32,000 in total interest thanks to the 1.25% rate drop. For a rental property where cash flow is the priority, that works. But the 25-year refi saves $154/month while eliminating over $93,000 in lifetime interest and keeping you on the same payoff timeline. For a long-term hold, the 25-year option is the better financial decision by a wide margin.

LTV check: $272,500 / $370,000 = 73.6%. That clears the 75% LTV threshold for a rate-and-term investment property refi. If the appraisal came in at $350,000, LTV would be 77.9%, and you would need to bring cash to close or explore DSCR lenders with higher LTV allowances.

Total interest savings: the number nobody shows you

Monthly savings is the headline number. Total interest saved over the life of the loan is the number that actually determines whether refinancing was a good decision.

On the 25-year refi in the example above, you save $52,400 in interest. Subtract the $5,450 in closing costs and your net benefit is $46,950. That is real money. But it only materializes if you hold the loan for the full 25 years. Sell in year 8 and you capture roughly $18,000 of that savings. Sell in year 3 and you barely break even on closing costs.

This is why your holding period drives the entire decision. A landlord planning to hold a rental in Atlanta, Georgia for 15 to 20 years has very different refinance math than a flipper who is selling in 18 months. The mortgage calculator lets you compare amortization schedules side by side to see exactly where the crossover happens.

When you should NOT refinance

Not every rate drop justifies a refinance. Here are the scenarios where keeping your current loan is the better call:

• You are selling within 2 to 3 years. If your break-even is 24 months and you plan to sell in 30 months, you only capture 6 months of savings. On $231/month, that is $1,386, well short of the $5,600 you spent to close. The refi loses money.
• The rate drop is small on a small balance. A 0.50% rate reduction on a $150,000 balance saves roughly $48/month. With $4,000 in closing costs, break-even is 83 months (nearly 7 years). Unless you are holding for a decade, that math does not work.
• You are deep into amortization. If you are 18 years into a 30-year loan, roughly 55% of your payment is going to principal. Refinancing resets you to mostly interest. The monthly payment might drop, but total cost skyrockets. Check your amortization schedule before calling a lender.
• Your credit score has dropped. If your score fell from 760 to 680 since origination, you may not qualify for a better rate at all. Lenders price risk into rate, and a lower score could mean the new rate is barely better, or worse, than what you have.
• You will burn through reserves. Closing costs eat cash. If paying $6,000 to close leaves you with less than 3 months of reserves, you are trading rate savings for liquidity risk. Keep the higher rate and keep your cash cushion.

How to get the best refinance rate

The rate your lender quotes depends on factors you can influence. Here is what actually moves the number:

• Get 3 to 5 Loan Estimates. Rate shopping within a 14-day window counts as a single credit inquiry. There is no penalty for comparing. The variance between lenders on the same borrower profile is typically 0.25% to 0.50%. On a $300,000 loan, that is $50 to $100/month in payment difference.
• Lower your LTV. Rates improve at specific LTV breakpoints: 75%, 70%, 65%. If your balance is at 76% LTV, paying down $3,000 to hit 75% can save 0.125% on your rate, which adds up to more than $3,000 over the life of the loan.
• Buy down the rate. One discount point (1% of the loan amount) typically buys a 0.25% rate reduction. On a $300,000 loan, that is $3,000 upfront to save $50/month. Break-even: 60 months. Good move if you are holding 7+ years.
• Choose the right loan product. Conventional rate-and-term refis have the best rates. Cash-out is higher. DSCR is higher still. FHA streamline refis skip the appraisal and have competitive pricing but come with mortgage insurance. Match the product to the property and your timeline.