🏠 Mortgage Calculator

See your true monthly mortgage payment — principal, interest, taxes, insurance, PMI, and HOA — then add extra payments to see your real payoff date and interest saved.

🏡 Home & Loan Details
$
$
%
Typical: 6.5–7.5% (30-yr mortgage)
%/yr
$
%/yr
$
$
per month
📈 Results
Total Monthly Payment
PITI + HOA + extra
Loan Amount
home price − down payment
Total Interest
over full term
Payoff Date
estimated

Monthly Payment Breakdown

Principal & Interest
Property Tax
Home Insurance
PMI Insurance
Total Monthly Payment
Monthly Payment Breakdown
Year-wise Principal vs Interest
Amortization Schedule (First 12 Months, Principal & Interest Only)
#DatePaymentExtraPrincipalInterestBalance
🏠

Enter Home & Loan Details

Fill in the home price, down payment, and interest rate, then click Calculate Mortgage to see your full monthly payment breakdown.

Guide

What Is the Mortgage Calculator?

Last updated: July 2026 · Reviewed by the NeftCal editorial team

A mortgage calculator tells you the true monthly cost of a home loan — not just principal and interest, but the full PITI picture: property tax, home insurance, PMI, and HOA fees layered on top. NeftCal's mortgage calculator goes further as a mortgage extra payment calculator and mortgage payoff calculator, letting you model extra monthly, yearly, and one-time payments to see exactly how much sooner you'd be mortgage-free and how much interest you'd save. It's built for anyone buying, refinancing, or already repaying a home loan who wants real numbers instead of a lender's rounded estimate.

Most online quotes only show principal and interest, which understates what actually leaves your bank account every month. Property tax, home insurance, and — if your down payment is under 20% — private mortgage insurance (PMI) can easily add several hundred dollars a month on top of the base payment. This calculator combines all of them into one PITI calculator so your budget reflects reality, and it supports 9 currencies with region-typical starting interest rates.

Who Should Use This Calculator

Home buyers sizing up affordability before house-hunting, current homeowners deciding whether extra principal payments are worth it, people comparing 15-year vs. 30-year terms, and anyone modeling a refinance scenario all benefit from seeing the full monthly number and its long-term trajectory rather than a single static payment figure.

Why It Matters for Financial Planning

A mortgage is usually the largest recurring expense in a household budget, and small differences in rate, term, or down payment compound into tens of thousands of dollars over 15-30 years. Understanding your full PITI payment — and how PMI, property tax growth, and extra payments interact with it — is central to deciding how much home you can actually afford and how aggressively to pay it down.

Common Scenarios

  • Comparing a 30-year vs. 15-year mortgage on the same home price to see the total-interest trade-off
  • Checking whether a 10% down payment triggers PMI, and how much it adds to the monthly payment
  • Testing whether a modest Extra Monthly Pay meaningfully shortens the payoff date
  • Comparing this mortgage's true monthly cost against a general Loan Calculator estimate that ignores taxes and insurance
  • Modeling a home purchase across currencies for a relocation, using the Paycheck / Salary Calculator to confirm the payment fits take-home pay

Tips for Accurate Results

  • Use your actual local property tax rate and insurance quote instead of the defaults — both vary significantly by location
  • A down payment below 20% triggers PMI in this calculator; raise it to 20%+ to see how much that cost disappears
  • Set a real loan Start Date so the payoff date and amortization schedule show actual calendar months, not just a period count
  • Try a modest Extra Monthly Pay under "+ More Options" before assuming a shorter fixed term is your only path to an earlier payoff
  • If HOA fees apply, include them — the Total Monthly Payment figure is only accurate once every recurring cost is entered
Formula

How Your Mortgage Payment is Calculated

Principal & interest come from the standard amortization formula; taxes, insurance, PMI, HOA and extra payments are layered on top

Principal & Interest Formula
M = L × r × (1 + r)ⁿ ÷ [(1 + r)ⁿ − 1]

Where:
M = Monthly principal & interest payment
L = Loan amount (home price − down payment)
r = Monthly interest rate = annual rate ÷ 12 ÷ 100
n = Loan term in months (years × 12)

Total Monthly Payment = M + (Home Price × Property Tax Rate ÷ 12) + (Annual Insurance ÷ 12) + PMI (if down payment < 20%) + HOA + Other Costs + Extra Monthly Pay

The calculator then walks the loan month by month from your Start Date, subtracting interest and principal from the balance and applying any extra monthly, yearly, or one-time payments straight to principal — so the payoff date and total interest reflect their real, compounding effect rather than a single static formula.

⚙️ Why This Formula Works

The principal & interest formula is the standard amortization equation: a fixed monthly payment, discounted at the monthly rate over n months, must exactly repay the loan amount. Each month, interest is charged on the current balance and the rest of the payment reduces principal, so the balance reaches exactly zero after the final scheduled payment. Extra payments shrink the balance faster than the formula assumes, which is why they must be simulated month by month rather than solved in closed form.

🎯 When to Use It

  • Before house-hunting, to set a realistic total-monthly-payment budget
  • When comparing loan terms (10/15/20/30 years) on the same home price
  • When deciding whether extra principal payments are worth the cash-flow trade-off
  • When modeling a refinance against your current loan's remaining balance

📋 Assumptions

  • Fixed interest rate for the full term (not an adjustable-rate loan)
  • PMI is applied at a constant monthly rate on the original loan amount whenever down payment is under 20%
  • Property tax, insurance, HOA, and other costs grow at the annual % you set, compounding once per year
  • Every extra payment is applied fully to principal in the month it falls

⚠️ Limitations of the Formula

  • Cannot model adjustable-rate mortgages (ARMs) where the rate changes mid-term
  • Does not include closing costs, discount points, origination fees, or appraisal costs
  • PMI does not auto-remove once you cross 20-22% equity, unlike most real servicers
  • Does not check credit score, debt-to-income ratio, or lender eligibility
Walkthrough

Step-by-Step: How to Use the Mortgage Calculator

From home price to full payment breakdown in under a minute

Enter the home price and currency

Input the total purchase price of the home and select your currency from the 9 supported options — the calculator pre-fills a region-typical interest rate for that currency as a starting point.

Set your down payment

Enter it as a percentage or a fixed amount — both fields stay in sync. Watch the hint below the field: below 20% down, PMI will automatically apply in the calculation.

Choose loan term and interest rate

Select 10, 15, 20, or 30 years and enter your quoted annual rate, or use the pre-filled regional typical-range hint if you don't have a lender quote yet.

Add taxes, insurance, PMI, HOA — and optional extra payments

Fill in property tax rate, home insurance, PMI rate, and HOA fee under "Include Taxes & Costs," then open "+ More Options" to set annual cost increases and any extra monthly, yearly, or one-time payments toward principal.

Click Calculate and interpret your results

Review your Total Monthly Payment, Loan Amount, Total Interest, and Payoff Date, along with a monthly breakdown chart, a year-wise principal-vs-interest chart, and a full amortization schedule with real dates.

Example

Worked Example

A realistic PITI calculation using this calculator's default 30-year home price and rate settings

Scenario

Suppose you're buying a $400,000 home with a 10% down payment ($40,000), leaving a $360,000 loan, at a 6.8% annual interest rate over a 30-year (360-month) term. Property tax runs 1.1%/yr, home insurance is $1,400/yr, and since the down payment is under 20%, PMI applies at 0.5%/yr.

Home Price$400,000
Down Payment (10%)$40,000
Loan Amount (L)$360,000
Interest Rate (r)6.8%
Term (n)30 yrs / 360 mo
Property Tax1.1%/yr
Step 1 — Monthly rate: r = 6.8 ÷ 12 ÷ 100 = 0.0056667. Over 360 months, (1 + r)³⁶⁰ ≈ 7.6465.
Step 2 — Principal & interest payment: M = 360,000 × 0.0056667 × 7.6465 ÷ (7.6465 − 1) ≈ $2,347.13/month.
Step 3 — Add taxes, insurance & PMI: Property tax = 400,000 × 1.1% ÷ 12 = $366.67/mo. Insurance = 1,400 ÷ 12 = $116.67/mo. PMI (down payment < 20%) = 360,000 × 0.5% ÷ 12 = $150.00/mo. Total = 2,347.13 + 366.67 + 116.67 + 150.00 ≈ $2,980.47/month.
Step 4 — First month's split: Interest = 360,000 × 0.0056667 = $2,040.00. Principal = 2,347.13 − 2,040.00 = $307.13. New balance = 360,000 − 307.13 = $359,692.87.
Total Monthly Payment
$2,980.47
Total Interest (30 yr, P&I)
$485,167
Loan Amount
$360,000

Explanation: Over the full 30-year term with no extra payments, this loan's principal & interest alone totals $845,167 — $485,167 of that is interest, roughly 135% of the amount borrowed. That's the cost of stretching repayment over three decades, and it's why the extra-payment tools matter.

Extra payment effect: Applying the same formula with an Extra Monthly Pay of $200 (equivalent to paying $2,547.13/month toward principal & interest) shows the loan paid off in roughly 286 months instead of 360 — about 6 years 2 months early — cutting total interest from $485,167 to roughly $367,500, a saving of about $117,700, for $200/month in extra payments.

Interpretation

Understanding Your Results

Is your total monthly payment a comfortable share of your income?

A widely cited affordability rule of thumb is the front-end housing ratio — your total monthly PITI (plus HOA) divided by your gross monthly income. It's a general guideline, not a rule your lender is required to follow, but it's a useful gut-check.

Housing Payment ÷ Gross Monthly IncomeGeneral ReadTypical Context
Under 28%ComfortableWithin the traditional "28/36 rule" most lenders reference
28% – 36%Common but tighterMany buyers in high-cost markets land here
Over 36%StretchedHigher risk of budget strain; may limit loan approval odds

For buyers: if your Total Monthly Payment result pushes past 36% of gross income, consider a larger down payment (which also removes PMI below 20%), a longer term, or a lower price range before committing. Use the Paycheck / Salary Calculator to confirm your actual gross and take-home income.

PMI as a cost signal: if PMI shows up in your results, it's a direct signal your equity is below 20% — worth tracking, since it's pure added cost with no equity benefit until it's removed.

Risk considerations: this calculator assumes a fixed rate and a steady payment schedule. It doesn't capture rate resets on ARMs, job-loss risk, maintenance costs beyond what you enter as "Other Costs," or PMI automatically dropping off — treat the total-interest figure as a planning estimate, not a guarantee.

ℹ️

This tool provides general financial estimates for educational purposes only and does not constitute personalized financial, tax, or investment advice. Mortgage terms, fees, and eligibility vary by lender — confirm final figures with your lender or a licensed financial advisor before making a borrowing decision.

Use Cases

Practical Use Cases for the Mortgage Calculator

Where this mortgage calculator earns its keep

🏠

Home purchase budgeting

Estimate your full monthly payment before house-hunting so you shop within a realistic price range.

🔄

Refinance evaluation

Model your remaining balance at a new rate and term to see whether refinancing actually lowers your total interest.

🛡️

PMI cost planning

See exactly how much PMI adds monthly, and how much a larger down payment would save by removing it.

Extra-payment payoff strategy

Test how a modest Extra Monthly or Extra Yearly Pay shortens your payoff date and cuts total interest.

🎯

First-time buyer affordability check

Compare a target home price against your income to see if the payment fits a sustainable budget.

📆

15-year vs. 30-year comparison

Weigh a shorter term's higher payment against its dramatically lower total interest cost.

🌍

Relocation cost comparison

Compare home costs across 9 currencies with region-typical rate hints for an international or cross-country move.

🏘️

HOA community budgeting

Add HOA fees to see the real total monthly cost of buying into a condo or planned community.

📈

Rate-shopping

Re-run the calculation at different quoted rates to see exactly how much a 0.25–0.5% difference changes your payment and total interest.

🧾

Escrow & rising-cost planning

Model annual increases in property tax, insurance, HOA, and other costs for a more realistic long-term budget.

Pros & Cons

Advantages and Limitations

What this mortgage calculator does well, and where it can't replace a lender's official numbers

✅ Advantages

  • Shows full PITI — principal, interest, taxes, and insurance — not just a bare payment estimate
  • Automatically calculates PMI whenever your down payment is below 20%
  • Models Extra Monthly, Extra Yearly, and unlimited one-time extra payments applied to principal
  • Shows your real accelerated payoff date and total interest saved from extra payments
  • Lets you set annual % increases for property tax, insurance, HOA, and other costs
  • Supports 9 currencies, each with a region-typical starting interest rate
  • Uses a real calendar Start Date so the amortization schedule shows actual month/year dates
  • Generates a monthly payment breakdown chart and a year-wise principal-vs-interest chart
  • Produces a full month-by-month amortization schedule
  • Downloadable plain-text summary of your inputs and results
  • Free, instant, and requires no signup or personal information
  • Runs entirely in your browser — your financial data is never sent to a server
  • Supports 10, 15, 20, and 30-year terms for direct side-by-side comparison

⚠️ Limitations

  • Assumes a fixed interest rate for the full term — can't model an adjustable-rate mortgage
  • Doesn't include closing costs, discount points, origination fees, or appraisal costs
  • PMI is applied at a constant rate for the full term and doesn't auto-remove at ~78-80% loan-to-value like most real servicers
  • Property tax and insurance figures are only as accurate as what you enter — actual local rates vary widely
  • Doesn't factor in your credit score, debt-to-income ratio, or lender eligibility
  • Doesn't include maintenance, utilities, or repair costs beyond the manual "Other Costs" field
  • Doesn't compare renting vs. buying
  • Results are estimates — not a substitute for your lender's official Loan Estimate or Closing Disclosure
Reference

Loan Term Comparison

Same $360,000 loan amount and 6.8% rate, compared across the four supported terms

TermMonthly P&ITotal Paid (P&I)Total Interest
30 years$2,347.13$845,167$485,167
20 years$2,748.30$659,592$299,592
15 years$3,195.51$575,192$215,192
10 years$4,142.52$497,102$137,102

Common Mistakes and Expert Tips

❌ Common Mistakes

  • Comparing lenders by interest rate alone, ignoring fees, points, and PMI cost
  • Ignoring PMI when budgeting for a low-down-payment purchase
  • Underestimating property tax and insurance, especially in high-tax counties
  • Forgetting HOA fees when budgeting for a condo or planned community
  • Assuming a lower monthly payment always means a better overall deal
  • Committing to an aggressive Extra Monthly Pay you can't sustain if income changes

💡 Expert Tips & Best Practices

  • Get a real property tax and insurance quote for the specific home, not just the calculator defaults
  • Run the numbers at 20%+ down to see exactly how much PMI is costing you below that threshold
  • Test a modest, sustainable Extra Monthly Pay rather than an aggressive one you might have to stop
  • Compare total interest across terms, not just the monthly payment, before choosing a term
  • Set a realistic Start Date so your payoff date and amortization schedule line up with your actual closing
FAQ

Frequently Asked Questions

Common questions about mortgage calculations, PMI, and extra payments

What does PITI mean in this mortgage calculator?
PITI stands for Principal, Interest, Taxes, and Insurance — the four core components of a typical monthly mortgage payment. This calculator adds PMI (when your down payment is below 20%), HOA fees, and other recurring costs on top so you see your true total monthly payment, not just principal and interest.
When does PMI apply, and when does it go away?
Private Mortgage Insurance (PMI) is calculated automatically in this calculator whenever your down payment is below 20% of the home price, since lenders typically require it until enough equity has been built up. In the real world, PMI is usually removed once your loan balance drops to about 78% of the original home value, or earlier on request once you reach 20% equity — this calculator applies PMI at a constant monthly amount for the full term, so treat the total-interest figure as a conservative estimate if you expect PMI to drop off partway through.
How do extra payments affect my mortgage?
Every extra dollar you pay — whether it's an Extra Monthly Pay, Extra Yearly Pay, or a one-time payment on a specific date — is applied directly to your loan's principal balance. That shrinks the balance interest is charged on for every payment afterward, which shortens your loan term and reduces total interest paid. Enter your extra payments under "+ More Options" and the results panel shows your accelerated payoff date and exactly how much interest you'll save.
Can I add more than one extra one-time payment?
Yes. Use "+ Additional One-Time Payments" to add as many one-time payments as you like, each with its own amount and date — for example a tax refund in April and a bonus in December. Each one is applied to the principal balance in the month it falls in.
How much down payment do I need?
Conventional loans often require as little as 3–5% down, but putting down less than 20% usually triggers PMI. Putting 20% or more down avoids PMI entirely and reduces your loan amount, interest cost, and monthly payment.
Are property tax and insurance included in every mortgage payment?
Often yes — many lenders collect 1/12th of your estimated annual property tax and insurance each month into an escrow account and pay the bills on your behalf. Some borrowers pay these separately instead; either way, they're real costs worth including in your budget. This calculator also lets you set an annual % increase for property tax, insurance, HOA, and other costs, since these rarely stay flat for the life of a loan.
What is the payoff date, and how is it different from my loan term?
Your loan term (e.g. 30 years) is the schedule your lender set when you signed. Your payoff date is when the loan is actually projected to reach a zero balance, based on your start date and any extra payments you've added. With no extra payments, the two line up; with extra payments, the payoff date moves earlier — the calculator shows both the date and how much time you've saved.
Should I choose a 15-year or 30-year mortgage?
A 15-year term has a higher monthly payment but a much lower interest rate environment and dramatically less total interest paid. A 30-year term has a lower monthly payment, giving more flexibility, but costs significantly more in interest over the life of the loan — on a $360,000 loan at 6.8%, the reference comparison on this page shows roughly $215,000 total interest at 15 years versus roughly $485,000 at 30 years. Use this calculator to compare both, or use extra payments to close the gap.
Can taxes, insurance, HOA, and other costs increase over time in the calculation?
Yes. Under "+ More Options" you can set an annual percentage increase for property tax, home insurance, HOA fees, and other costs separately, so multi-year projections reflect rising homeownership costs rather than assuming everything stays flat for the life of the loan.
Does this calculator show a full amortization schedule?
Yes. It produces a month-by-month amortization schedule with real calendar dates based on your chosen loan start date, showing the payment, any extra amount, principal, interest, and remaining balance for each month, alongside a monthly payment breakdown chart and a year-wise principal-vs-interest bar chart.
What currencies does the Mortgage Calculator support?
It supports 9 currencies — INR, USD, EUR, GBP, JPY, AUD, CAD, SGD, and AED — each pre-filled with a region-typical mortgage interest rate as a starting point that you can adjust to match your actual quote.
How do you calculate a mortgage payment manually?
Use the standard amortization formula: M = L × r × (1 + r)ⁿ ÷ [(1 + r)ⁿ − 1], where L is the loan amount, r is the monthly interest rate (annual rate ÷ 12 ÷ 100), and n is the loan term in months. For example, on a $360,000 loan at 6.8% annual interest over 30 years (360 months), r = 0.0056667 and the formula gives a principal & interest payment of roughly $2,347.13 per month — before adding taxes, insurance, PMI, or HOA.
Is this mortgage calculator free to use, and is my data private?
Yes, it's completely free with no signup. All calculations run locally in your browser using JavaScript — your home price, down payment, income, and other details are never transmitted to or stored on a server.
How accurate is this calculator compared to my lender's official Loan Estimate?
This calculator uses the same amortization math lenders use internally, so the principal & interest figure is typically very close. Your lender's official Loan Estimate or Closing Disclosure may differ because it includes lender-specific fees, discount points, an actual underwritten PMI rate, and exact local tax and insurance figures — always confirm final numbers with your lender before closing.
Can I use this calculator for a refinance instead of a new home purchase?
Yes. Enter your current payoff balance as the "Home Price" and set the down payment to $0 (or enter any cash you're putting toward the new loan), then use your new proposed rate and term. The results will show your new estimated payment and let you model extra payments the same way as a purchase loan.
Learn More

Authoritative Resources on Mortgages

Official guidance to complement this calculator — not a substitute for licensed financial advice

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