Mortgage Calculator

How to Use This Mortgage Calculator

Enter your home price and down payment to see your loan amount. Pick a loan term and interest rate, then expand the optional section to add property tax, home insurance, PMI, and HOA fees for a complete PITI (Principal, Interest, Tax, Insurance) estimate.

What's included in your monthly payment?

• Principal & Interest (P&I): The core loan repayment that pays down your mortgage balance.
• Property Tax: Annual local tax on your home, divided by 12 and usually escrowed by your lender.
• Home Insurance: Required by lenders. Average US homeowners insurance is around $1,400–$1,800/year.
• PMI: Private Mortgage Insurance. Required when your down payment is less than 20% on a conventional loan.
• HOA Fees: Common in condos, townhomes, and planned communities.

How is mortgage interest calculated?

Standard fixed mortgages use the formula:

M = P × [r(1+r)ⁿ] / [(1+r)ⁿ − 1]

Where M is monthly payment, P is loan principal, r is monthly interest rate (APR ÷ 12), and n is total number of payments (years × 12). Most of your early payments go toward interest; principal builds up over time.

30-year vs 15-year mortgage

A 30-year mortgage has lower monthly payments but you pay much more in total interest. A 15-year mortgage typically has a lower interest rate and saves tens of thousands in interest, but the monthly payment is significantly higher. Use this calculator to compare both terms with your numbers.

How much house can I afford?

A common rule is the 28/36 rule: spend no more than 28% of gross monthly income on housing (PITI), and no more than 36% on total debt. Lenders may approve higher, but staying conservative helps with savings, emergencies, and lifestyle.

A more realistic check is the "empty wallet test": subtract your proposed PITI from your take-home pay, then subtract groceries, utilities, transportation, insurance, childcare, and minimum debt payments. If less than 10% of net income remains for everything else (savings, dining out, repairs, hobbies), the house is too expensive. Lenders calculate affordability on gross income — your real life runs on net.

Real Examples: How a Small Rate Change Adds Up

Mortgage interest compounds over hundreds of payments, so even a quarter-percentage point matters. Here's what the same $400,000 loan looks like at different rates over 30 years:

The gap between 5.5% and 7.5% on a single loan is over $189,000 in extra interest — more than many people pay for a starter home. This is why shopping among lenders matters and why locking your rate at the right moment is so consequential.

The 30-Year vs 15-Year Decision in Numbers

Take a $350,000 loan at typical current rates. The 15-year loan usually carries about a 0.5–0.75 point lower rate because the lender takes on less risk:

• 30-year at 6.85%: $2,295/month, $476,400 in interest, paid off in 2056.
• 15-year at 6.10%: $2,973/month, $185,200 in interest, paid off in 2041.

The 15-year payment is $678 higher, but you save almost $291,000 in interest and own your home outright 15 years sooner. Whether that trade is worth it depends on your other goals — paying down high-interest debt, maxing retirement accounts, or building an emergency fund may all rank higher than aggressive mortgage payoff.

Down Payment: 20% Isn't Magic, But It Saves Money

The "20% down" rule is a guideline, not a law. With less than 20% down on a conventional loan, you'll pay private mortgage insurance (PMI) until your loan-to-value (LTV) reaches 80%. PMI typically costs 0.3% to 1.5% of the loan annually. On a $400,000 loan, that's $1,200–$6,000 per year of pure cost with no benefit to you.

That said, putting less than 20% down can still make sense if home prices are rising faster than you can save, if the alternative is renting at high cost, or if you have better uses for the cash (investing, paying off student loans, building a business). PMI ends automatically at 78% LTV — usually within 5–10 years on a 30-year loan with normal price appreciation.

The Mortgage Application Timeline (What to Expect)

Most US homebuyers complete a mortgage in 30 to 60 days from offer acceptance to closing. Here's what happens at each stage and what slows things down.

1. Pre-Approval (1–3 days, before house hunting)

Submit pay stubs, W-2s or tax returns, bank statements, and ID. The lender pulls credit and issues a pre-approval letter stating the maximum loan amount and rate range. Pre-approval is not a commitment to lend — it's an estimate based on what you've shown them. A pre-approval letter typically expires in 60–90 days.

Pre-approval is different from pre-qualification. Pre-qualification is a quick, often unverified estimate. Pre-approval involves a hard credit pull and document review and carries far more weight with sellers in competitive markets.

2. Offer and Purchase Agreement (1–2 days)

Once your offer is accepted, the executed contract starts the formal mortgage clock. You'll typically need to deliver earnest money (1–3% of the price, held in escrow) within 1–3 business days.

3. Loan Application and Disclosures (within 3 business days)

Within 3 business days of the executed contract, the lender must provide a Loan Estimate showing the projected rate, monthly payment, fees, and closing costs. Compare Loan Estimates from at least three lenders side by side — section-by-section — before locking your rate.

4. Underwriting (10–25 days)

This is the slow stage. Underwriters verify employment (often a phone call to your HR department), confirm assets, scrutinize tax returns, and evaluate the property appraisal. Expect to be asked for additional documents on short notice — a recent paycheck, an explanation for a large bank deposit, divorce papers, a clarification of past addresses. Respond same-day if you can.

Three things commonly delay underwriting: (a) a low appraisal that requires renegotiation; (b) credit changes during the process (don't open new credit cards or finance a car); (c) employment changes or large unexplained bank deposits.

5. Clear to Close and Closing Disclosure (3–5 days before close)

"Clear to close" means underwriting approved your loan. Federal law requires you to receive the final Closing Disclosure at least 3 business days before signing. Compare it to your original Loan Estimate — fees should match within tolerance, and any large differences should be questioned.

6. Closing Day

You'll sign 60–80 documents (most are routine), wire-transfer your closing funds, and receive keys. The transaction is technically funded the next business day in most states. Bring two forms of ID and a cashier's check or wire confirmation.

First-Time Homebuyer Programs in the US

If you've never owned a home — or haven't owned one in three years — you may qualify for loan programs that require less down payment, accept lower credit scores, or charge lower interest. Here are the four programs that cover the majority of first-time buyers.

FHA Loans (Federal Housing Administration)

FHA loans are insured by the federal government, which lets lenders accept lower credit scores and smaller down payments. Minimum down payment is 3.5% with a 580+ credit score, or 10% with a 500–579 score. Closing costs can sometimes be rolled into the loan or paid by the seller.

The trade-off: FHA loans require mortgage insurance premium (MIP) — both upfront (1.75% of the loan) and annually (0.55%). Unlike conventional PMI, FHA MIP usually lasts the entire life of the loan. For many borrowers, refinancing into a conventional loan once they reach 20% equity makes financial sense.

VA Loans (Department of Veterans Affairs)

Active-duty service members, veterans with qualifying service, and some surviving spouses can use VA loans, which require no down payment and no monthly mortgage insurance. Rates are typically 0.25–0.5% lower than conventional. There is a one-time funding fee (usually 1.25–3.3% of the loan), which can be financed.

VA loans are arguably the best mortgage product available in the US for those who qualify. The funding fee is waived for veterans receiving disability compensation.

USDA Loans (Rural Development)

Available in designated rural and some suburban areas (check the USDA eligibility map for your address). Zero down payment, lower mortgage insurance than FHA. Income limits apply — typically 115% of the area median income.

Don't assume "rural" means farms only — many small-town and outer-suburban addresses qualify.

Conventional 97 / HomeReady / Home Possible

Fannie Mae and Freddie Mac offer conventional loans with as little as 3% down for first-time buyers (Conventional 97) or low- to moderate-income borrowers (HomeReady, Home Possible). Credit score requirements are usually 620+. PMI applies but can be removed at 80% LTV — a significant advantage over FHA.

State and Local Down Payment Assistance

Most states and many cities run down payment assistance programs that provide grants, forgivable loans, or low-interest second mortgages. Programs change frequently and have strict income/property limits, but they can reduce out-of-pocket cost by $5,000–$25,000. Search your state's housing finance agency website (e.g., "[State] HFA first-time buyer").

Closing Costs: What Buyers Actually Pay

Closing costs typically run 2% to 5% of the loan amount on top of your down payment. On a $400,000 home with 10% down ($40,000 down), expect $7,200–$18,000 in closing costs. Here's what they cover:

Lender Fees

• Origination fee: 0.5–1% of the loan. Some lenders waive this if you accept a slightly higher rate.
• Discount points: Optional. Each point costs 1% of the loan and lowers your rate by ~0.25%.
• Application/processing/underwriting fees: $300–$1,500 combined, varies widely.

Third-Party Fees

• Appraisal: $400–$700, paid to a licensed appraiser.
• Credit report: $25–$75.
• Title search and title insurance: $700–$2,000. Lender's title insurance is required; owner's title insurance is optional but strongly recommended.
• Survey: $300–$600 (sometimes optional).
• Pest/termite inspection: $75–$150 (often required in southern states).

Government Fees and Prepaids

• Recording fees and transfer taxes: Highly variable by state — from $100 in some states to several thousand in NY/NJ/PA.
• Prepaid interest: From closing date to month end.
• Escrow setup: Typically 2 months of property tax and insurance to seed the escrow account.
• First-year homeowner's insurance: Often required upfront at closing.

You can negotiate some closing costs (origination fees, title insurance, sometimes appraisal) and shop others (insurance, title in many states). The Loan Estimate's "Services You Can Shop For" section lists which fees you control.

Common Mortgage Mistakes That Cost Buyers Thousands

Mistake 1: Only Getting One Quote

Multiple studies show borrowers who get just one quote pay rates that are 0.25–0.5% higher on average. On a $400,000 loan over 30 years, that's $35,000–$72,000 wasted. Get at least three Loan Estimates within a 14-day window — credit bureaus treat them as a single inquiry for scoring purposes.

Mistake 2: Confusing Rate with APR

The interest rate is what you pay on the principal. The APR includes interest plus required fees, expressed annually. A loan with a 6.5% rate and 0.5% APR difference is paying about $2,000/year in fees. Always compare offers by APR for an apples-to-apples view.

Mistake 3: Stretching to the Maximum Approval

Lenders approve based on your debt-to-income ratio at the moment, not your real-life expenses. A pre-approval for $500,000 doesn't mean you should buy a $500,000 house. House-poor homeowners struggle with maintenance ($3,000–$10,000/year is normal), savings, and unexpected medical or career setbacks.

Mistake 4: Skipping the Home Inspection

A $400–$700 inspection can reveal $20,000+ problems with the roof, HVAC, foundation, or plumbing. In hot markets, buyers sometimes waive inspections to win bids — this is a high-risk gamble. At minimum, do an "informational inspection" with no contingency, so you know what you're buying.

Mistake 5: Opening New Credit During Underwriting

Underwriters re-pull credit shortly before closing. Buying a new car, opening a department store card, or financing furniture between application and closing has cost buyers their loan approval entirely. Wait until after closing.

Mistake 6: Ignoring the Closing Disclosure

The Closing Disclosure arrives 3 business days before closing. Compare every line to your original Loan Estimate. Lenders sometimes add fees that weren't disclosed earlier — and federal regulations limit how much certain fees can change. If something looks wrong, ask before signing.

Mistake 7: Locking Your Rate at the Wrong Time

Rate locks typically last 30, 45, or 60 days. Lock too early and you may pay extension fees if closing slips; lock too late and rates may rise. As a rule of thumb, lock once you have a signed purchase contract and a clear closing date — usually 30–45 days out.

Mistake 8: Forgetting the Cost of Ownership

Maintenance averages 1–2% of home value annually. Property taxes generally rise over time. HOA fees often increase. Plan for $400–$1,000/month above your mortgage payment in ongoing costs you won't see in the loan estimate.

How to Get the Best Mortgage Rate

Improve Your Credit Score Before Applying

The largest rate-pricing tier on a conventional loan is 740+. Going from a 680 score to 740 typically saves 0.25–0.5% on your rate — easily $50,000+ in lifetime interest on a $400,000 loan. Steps that can lift a score 20–60 points in 60–90 days:

• Pay down revolving credit balances to under 10% of each card's limit (utilization is 30% of your FICO score)
• Don't close old accounts — average account age matters
• Dispute genuine errors on your credit reports (free at annualcreditreport.com)
• Become an authorized user on a family member's old, well-managed credit card

Reduce Your Debt-to-Income (DTI) Ratio

DTI is your monthly debt payments divided by gross monthly income. Most lenders cap DTI at 43–50%. Below 36% gets you better rates. Two ways to lower it: pay off small revolving debts, or refinance high-payment debts (auto, personal loans) into longer terms shortly before applying.

Consider Buying Points — Or Don't

Each discount point costs 1% of the loan and lowers your rate by approximately 0.25%. The break-even on points is usually 5–7 years. If you'll keep the mortgage longer than that, buying 1–2 points often pays off. If you're likely to refinance or move within 5 years, points usually don't.

Shop with Multiple Lender Types

Quotes from a big bank, a credit union, and an online lender frequently differ by 0.25–0.5%. Mortgage brokers shop multiple lenders simultaneously but charge a fee. Direct lenders cut out the middleman. Don't assume your bank will offer the best rate just because you have an account there.

Time Your Lock

Mortgage rates move daily based on the 10-year Treasury yield, inflation data, and Federal Reserve signals. If rates are trending down, a shorter (30-day) lock saves money. If trending up, a longer (60-day) lock or float-down option can help.

Should You Refinance? A Decision Framework

Refinancing replaces your existing mortgage with a new one. The most common reasons are lowering your rate, shortening your term, switching from ARM to fixed, or pulling cash out of equity.

The Break-Even Calculation

The basic test: divide your refinance closing costs by your monthly savings. The result is the number of months until refinance pays for itself.

Example: $5,000 in closing costs ÷ $200/month savings = 25 months to break even. If you'll stay in the home longer than 25 months, the refinance is worth it.

Rate-and-Term Refinance

The traditional refinance: lower the rate, change the term, keep the loan balance the same. The general rule is that a 0.75–1% rate drop justifies a refinance for most borrowers, but the math depends on your closing costs and how long you'll stay.

Cash-Out Refinance

You take out a new, larger loan and pocket the difference as cash. Useful for major home improvements, debt consolidation (only if rates and discipline both make sense), or large purchases. Risks: you're using your home as collateral for what was previously unsecured debt, and you reset your amortization clock.

When NOT to Refinance

• You plan to move within 2–3 years
• Closing costs eat all your savings
• Your new rate isn't materially lower (less than 0.5% improvement)
• You'd extend the term and pay more interest in the long run despite a lower monthly payment
• Your credit score has dropped since the original loan, so quotes are worse

Streamline Refinance Options

If you have an FHA, VA, or USDA loan, "streamline" refinance programs exist with reduced documentation, no appraisal in many cases, and lower fees. These are worth investigating before exploring conventional refis.

Mortgage Prepayment: Strategies and When They Make Sense

Paying off your mortgage early saves enormous interest. On a $400,000 loan at 6.85% over 30 years, an extra $200/month cuts about 6 years and $90,000 in interest off the loan. But prepayment isn't always the best use of money. Here's how to decide.

Strategy 1: Round Up Your Payment

The lowest-friction approach. If your P&I is $2,398, pay $2,500. The extra $102 always goes to principal. Tell your lender in writing to apply extra payments to principal — some default to "next month's payment" otherwise.

Strategy 2: Bi-Weekly Payments

Instead of 12 monthly payments per year, make a half-payment every two weeks. That's 26 half-payments = 13 full payments per year, sneaking in one extra payment annually. On a 30-year loan, this typically cuts 4–6 years off the term. Some lenders charge a setup fee for "official" bi-weekly programs — you can do the same thing manually for free.

Strategy 3: Annual Lump Sum

Apply your tax refund or year-end bonus directly to principal. A single $5,000 payment in year 5 of a 30-year loan saves roughly $15,000 in interest over the loan's life.

When Prepayment Is the Right Move

• You have no high-interest debt (credit cards, personal loans above 8%)
• Your emergency fund is fully funded (3–6 months of expenses)
• You're maxing or close to maxing employer 401(k) match — that's free money you can't beat
• Your investment alternatives don't reasonably exceed your mortgage rate after taxes
• You value the psychological certainty of being debt-free

When NOT to Prepay

• Your mortgage rate is below 4–5% — historical stock market returns have been higher
• You're not yet maxing tax-advantaged retirement accounts
• You have higher-interest debt
• You're in your peak earning years and the mortgage interest deduction (if you itemize) reduces effective rate

Glossary of Common Mortgage Terms

Mortgage paperwork uses dozens of acronyms and specialized terms. Here are the ones you're most likely to encounter.

Adjustable-Rate Mortgage (ARM)

A mortgage where the rate is fixed for an introductory period (often 5, 7, or 10 years), then adjusts periodically based on a benchmark index. Notation like "5/1 ARM" means 5 years fixed, then adjusts annually.

Amortization

The schedule of how each payment is split between interest and principal. Early payments are mostly interest; later payments are mostly principal. The amortization schedule is mathematically determined at loan origination.

Closing Disclosure (CD)

A 5-page federal form delivered at least 3 business days before closing showing final loan terms and costs. Replaces older "HUD-1" forms.

Debt-to-Income Ratio (DTI)

Monthly debt payments divided by gross monthly income. Most lenders cap DTI at 43–50% for conventional loans.

Earnest Money

A deposit (usually 1–3% of the price) you provide when an offer is accepted, held in escrow until closing. Demonstrates serious intent and is credited toward your closing costs at the end.

Escrow Account

An account your lender manages to pay property taxes and homeowner's insurance from collected monthly amounts. Required for most loans with less than 20% down.

FICO Score

The most widely used credit-scoring model, ranging from 300 to 850. Mortgage lenders typically use the middle of three scores from Equifax, Experian, and TransUnion.

Loan Estimate (LE)

A 3-page federal form delivered within 3 business days of application showing projected loan terms and closing costs. The "shopping" tool — get one from each lender you're comparing.

Loan-to-Value Ratio (LTV)

Loan amount divided by appraised home value. 80% LTV is the threshold below which PMI becomes unnecessary on conventional loans.

Origination Fee

A lender's fee for creating the loan, usually 0.5–1% of the loan amount. Sometimes negotiable.

Points (Discount Points)

Optional upfront fees paid to lower your interest rate. One point equals 1% of the loan and typically reduces the rate by 0.25%.

Principal

The actual amount borrowed, separate from interest. Each payment reduces the principal balance gradually.

Private Mortgage Insurance (PMI)

Insurance that protects the lender (not you) if you default. Required on conventional loans with less than 20% down. Removed automatically at 78% LTV; can be requested at 80%.

Rate Lock

A lender's commitment to a specific interest rate for a defined period (usually 30–60 days). Protects you from rate increases during processing.

Title Insurance

Insurance protecting against defects in the property's ownership history (liens, fraud, undisclosed heirs). Lender's title insurance is required; owner's title insurance is optional but recommended.

Underwriting

The lender's process of verifying your income, assets, credit, and the property's value before approving the loan. Usually the slowest stage of mortgage processing.

Frequently Asked Questions