Mortgage & Savings FAQ

Yes — enter your estimated annual property tax and homeowners insurance, and the calculator adds them (along with HOA dues and PMI if applicable) to show the realistic total monthly payment, not just principal and interest.

By federal law, PMI must be automatically cancelled once your loan balance reaches 78% of the home's original value, and you can request removal even earlier once you hit 80%.

On a 30-year loan, interest compounds over the full term — it's normal for total interest to approach or exceed the original loan amount, especially at higher rates. The amortization table above shows exactly how that breaks down year by year.

No — it's the standard guideline for conventional loans. FHA and other programs sometimes allow higher ratios, up to 43-50% for well-qualified borrowers, though a higher ratio doesn't necessarily mean a more comfortable payment.

Gross (pre-tax) income — that's what lenders use when calculating these ratios, even though your actual take-home pay is lower.

Interest rate has an outsized effect because it changes how much of each payment goes to interest vs. principal — even a 0.5-1% move can shift your affordable price by tens of thousands of dollars.

LTV is your loan amount divided by your home's appraised value (or purchase price, whichever is lower), expressed as a percentage. A $320,000 loan on a $400,000 home is 80% LTV — the other 20% is your equity or down payment.

Lower LTV means less risk to the lender, since you have more equity cushion if the home's value drops. Lenders price this in directly — crossing below certain LTV thresholds (like 80% or 60%) often unlocks a meaningfully better rate tier, separate from your credit score.

80% LTV (a 20% down payment) is the standard threshold to avoid PMI on a conventional loan. Some jumbo loans or investment properties require even lower LTV — sometimes 70-75% — to get the best available pricing.

Most people use a high-yield savings account or short-term CD rather than the stock market, since down payment funds are usually needed within 1-3 years and shouldn't be exposed to market swings.

Yes — it compounds your APY monthly against your growing balance, alongside your regular contribution, to project a realistic timeline.

This calculator assumes a consistent contribution. If your savings rate will change significantly, rerun it with an updated monthly amount to see the new timeline.

Include whichever housing payment applies to you now as part of your other obligations; the new proposed payment is compared separately as your front-end ratio.

No — DTI only includes recurring debt obligations like loans and minimum card payments, not everyday living expenses.

Generally, a back-end DTI at or below 36% gets you the most favorable terms, though approval is possible higher with strong credit and cash reserves.

Include everything your lender quotes in the loan estimate — origination fees, appraisal, title insurance, and any points — typically 2-5% of the loan amount.

It can — restarting the amortization clock means more of your early payments go toward interest again, even at a lower rate. Compare total interest over your realistic time in the home, not just the new monthly payment.

It's a straightforward closing-costs-divided-by-monthly-savings calculation, the standard way to think about breakeven — but always confirm exact costs and rate against your actual lender quote.

Use a conservative, realistic number for your area — national long-term averages tend to track close to inflation plus 1-2% annually, not the higher numbers sometimes seen in short hot markets.

The comparison factors in typical ownership costs like maintenance, but exact closing costs vary by location — for a precise number, use an estimate from a local lender or agent.

Because a down payment isn't free money you save by buying — it's capital that could otherwise be invested. Comparing what it could earn elsewhere gives a fairer picture of buying's true cost.

Both help, but a lump sum applied earlier in the loan saves more interest per dollar than the same amount spread out later, since it reduces the balance interest is calculated on for more remaining months.

Not always — some lenders apply extra amounts to your next scheduled payment by default. Check with your servicer and specify "apply to principal" if that's your intent.

The main tradeoff is liquidity — money paid toward principal is harder to access than a savings account. Many advisors suggest building an emergency fund and capturing any employer retirement match first.

Most often the seller or homebuilder, offered as a closing incentive — though buyers can fund their own buydown in some cases too.

No — it only temporarily reduces your payment for the discount period. Your loan's permanent rate and balance are unaffected.

You'd lose the remaining discount, since the buydown structure applies to your original loan specifically — factor that into any refinance timing decision.