What is a mortgage recast and how is it different from refinancing?

A recast isn't a refinance. Your rate and term stay exactly the same. You make a lump-sum payment and the lender re-amortizes your existing loan over that same remaining term, landing on a lower required monthly payment. Your payoff date barely moves, your monthly bill does. Recasting usually costs a flat fee of $150 to $500, requires a minimum lump sum of $5,000 to $10,000, and FHA/VA loans often don't qualify.

When can I remove private mortgage insurance (PMI) from my loan?

Federal law requires automatic PMI cancellation once your loan balance reaches 78% of the original home value, no request needed. Earlier removal at 80% loan-to-value is possible but usually requires a formal appraisal.

Should I put extra money toward mortgage principal or invest it instead?

Extra principal is a guaranteed return equal to your mortgage rate. Investing isn't guaranteed, but has historically outpaced typical mortgage rates over long time horizons. Which one comes out ahead depends on your expected investment return and payoff timeline, and it's ultimately a risk tolerance decision, not a pure math answer.

What order should I prioritize paying down debt, saving, and investing?

High-interest debt first, anything above your mortgage rate. Then a 3-6 month emergency fund. Then your employer's 401(k) match, if offered, an instant uncapped return. Then the PMI removal threshold, if it applies to you. Only after that does extra principal versus investing the difference matter.

Mortgage Early Payoff Calculator

The 3 lesser-known strategies that can shave years and thousands of $$$ in interest off your mortgage:

Extra Principal
Recasting (Not Refinancing)
Investing the Difference

Run the numbers side-by-side below using our interactive tools.

Your Loan

Why start date + term: easier to recall than "years left." P&I looks off? Type your real payment in to override, usually means a past recast.

Current balance ($)

Interest rate (%)

Loan start date

Original term (years)

Monthly P&I ($)

Monthly escrow ($)

Remaining term: - · P&I is calculated automatically from the fields above. Only type a number in if your real payment doesn't match, for example after a past recast. Escrow (taxes and insurance) is optional, add it to see your real total monthly bill, it doesn't affect the payoff math.

Results

Baseline (as-is)

Extra principal

Recast

Baseline Extra principal Recast

Keep an eye on the graph above, it updates real-time as you adjust the strategies below Baseline - Extra Principal - Recast - Get my payoff playbook ❯

Strategy 1

Extra Principal Each Month

Why it works: shrinks the balance interest accrues on, earlier is better. The catch: lenders often default extra payments to "next payment," not principal, which barely helps. Confirm it's marked "principal only" on your statement, or just ask your servicer.

Same required payment, faster payoff, less total interest.

$200

Bonus

PMI (Private Mortgage Insurance) Removal Threshold

Automatic at 78%: federal law requires cancellation at 78% LTV, no request needed. Earlier removal at 80%: possible, but usually needs a formal appraisal, not guaranteed. Ask your servicer for their process.

Extra principal from Strategy 1 doesn't just cut interest, it also gets you to 80% loan-to-value faster, which is when PMI can come off. Lenders drop it once you reach that threshold. This shows the equity gap and how fast extra principal closes it.

Home value ($)

Monthly PMI cost ($)

Strategy 2

Mortgage Recasting

Not a refinance: same rate, same term, just a lower payment. Fine print: flat fee ($150-$500) · minimum lump sum ($5K-$10K) · FHA/VA loans often don't qualify · must be requested in writing. Confirm eligibility and fees with your servicer first.

A recast isn't a refinance, your rate and term stay exactly the same. Instead, you make a lump-sum payment and the lender re-amortizes your existing loan over that same remaining term, landing on a lower required payment. Your payoff date barely moves, your monthly bill does.

Lump sum ($)

Applied in month #

Keep paying the extra principal above after recasting too

Strategy 3

Invest the Difference

The assumption: a steady return, no volatility, taxes, or fees, real markets don't work that way. The trade-off: extra principal is guaranteed at your mortgage rate, investing isn't. Simplified illustration, not financial advice, talk to an advisor for your situation.

Is it better to pay down your mortgage faster, or invest that money instead? This compares both paths side by side, extra principal now vs. investing the same amount, so you can see which one actually comes out ahead by your payoff date.

Expected annual investment return (%)

Extra principal, then invest

Invest instead of extra principal

Putting it together

The Order That Actually Matters

None of these strategies compete with each other, they compete with everything else your money could be doing. Here's the sequence that gets you the best guaranteed return first.

High-interest debt first. Credit cards, personal loans, anything above your mortgage rate. Pay these off before any extra principal, the rate is almost always worse.
Emergency fund. 3-6 months of expenses, liquid. A paid-down mortgage can't cover a surprise bill next week.
Employer 401(k) match, if offered. An instant, uncapped return, nothing else on this list beats it.
PMI threshold, if it applies to you. The extra principal needed to hit 80% loan-to-value has an outsized effect, it removes a fixed monthly fee, not just interest.
Extra principal vs. investing the difference. Extra principal is a guaranteed return equal to your mortgage rate. Investing isn't guaranteed, but historically has outpaced typical mortgage rates over long horizons. Where you land here is a risk tolerance call, not a math answer, use Strategy 3 above to see the trade-off in real numbers.

Get your playbook

Get Your Payoff Playbook Emailed to You

We'll send the payoff playbook you just built, your exact numbers from above, plus the scripts for calling your lender to request a recast or PMI removal. One email with a few short follow-ups later. Unsubscribe anytime.