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Refinance Calculator | Break-Even & Monthly Savings

Quick reference

Break-even months by monthly saving (fees $6,000):

Saving/mo	Break-even
$50	120 mo
$100	60 mo
$150	40 mo
$200	30 mo

schedule Break-even rule

Stay-in-the-home time must exceed break-even months, or the fees never pay back.

balance Term trade-off

A longer new term cuts the payment but can cost more over life — compare lifetime savings, not just monthly.

trending_down Rate thresholds

A drop of 0.5–0.75 pt usually clears break-even within 2–4 years at typical fees.

shield ARM to fixed

Refinancing out of an adjusting ARM into a fixed rate can be worth it even at equal payment — it caps risk.

lightbulb A real example — $300k at 6.75% → 5.75%

$300,000 balance, 24 years left at 6.75%; refi to 5.75% for 30 years with $6,000 fees rolled in.

Result: Old payment ≈ $2,068; new ≈ $1,930. Saving $138/month, break-even ≈ 43 months.

What this means: If you're likely to move within 4 years, negotiate lower fees or skip; if staying 10+, this refi saves roughly $25k net over the period you'd otherwise still owe.

Formula & methodology

Formula: New P&I = PMT(balance + fees, newRate/12, term×12); Break-even months = fees ÷ monthly savings

How refinance math works

The calculator runs two amortization payments: your current balance at your current rate for the remaining term, and the same balance plus rolled-in closing costs at the new rate for the new term. Monthly saving is the difference; break-even is closing costs divided by that monthly saving.

Example: $300,000 balance, 24 years left at 6.75%, refinanced to 5.75% for 30 years with $6,000 fees. Old payment ≈ $2,068; new ≈ $1,930 (fees financed). Saving ≈ $138/month → break-even ≈ 43 months. Extending the term cuts the payment but can raise lifetime cost — the calculator shows both.

Rules of thumb: refinance when you'll keep the loan past break-even, when the rate drop is ≥0.5–0.75%, or when moving from ARM to fixed.

Authoritative source: https://www.consumerfinance.gov/owning-a-home/process/refinance/

Frequently asked questions

When is refinancing worth it?

When monthly savings repay the closing costs before you move or pay off the loan: break-even months = closing costs ÷ monthly savings. Below ~40 months is generally strong.

Is it worth refinancing for 1 percent?

Usually yes — a 1-point drop on a $300,000 loan saves roughly $190/month, repaying $6,000 of fees in about 32 months.

Can closing costs be rolled into the refinance?

Yes — the calculator adds fees to the new balance by default, which slightly raises the new payment and lengthens break-even.

Does a longer term hurt even if the payment drops?

It can: restarting a 30-year clock adds years of interest. Check the lifetime-savings line — if it's negative, the monthly win costs you long-term.

What is a no-closing-cost refinance?

The lender covers closing costs in exchange for a slightly higher rate — typically 0.125–0.25% above the standard offer. There is no free lunch: you pay the costs gradually through that higher rate. It makes sense if you might move or refinance again within a few years; if you will hold the loan long-term, paying costs upfront at the lower rate usually wins.

How does a cash-out refinance change the math?

Borrowing extra against equity raises the new balance, so the payment may not drop even at a lower rate — the break-even logic shifts from 'monthly savings vs. fees' to 'cost of the extracted cash vs. alternatives'. Compare the refinance rate against a HELOC or home-equity loan rate for the same amount before deciding the cash-out is the cheapest way to borrow.

Can I refinance more than once?

Yes — there is no legal limit, though most lenders want to see about six months of payments on the current loan first, and each refinance restarts closing costs. Serial refinancing during a falling-rate cycle can make sense, but watch the cumulative fees: three $5,000 refinances need $15,000 of total savings to justify themselves, not just each one beating the last.

Should I refinance to remove PMI?

Often yes. If appreciation or paydown has pushed your loan-to-value to 80% or below, refinancing into a loan without private mortgage insurance can save $100–300/month on top of any rate improvement. Get a current value estimate first — the whole play depends on the home appraising high enough to hit that 80% threshold.

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