Calculator

Know Your True Monthly Housing Cost Before You Buy

Enter home price, down payment, rate, and term to get the full picture: principal and interest, taxes, insurance, HOA, total interest paid, and a month-by-month amortization table.

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Know Your True Monthly Housing Cost Before You Buy
Free Tool

Mortgage Calculator

Calculate your monthly payment, total interest, and full amortization schedule for any home loan.

Loan Details

LTV: 80%

This calculator is for educational purposes only. Consult a mortgage professional for personalized advice.

A breakdown of monthly housing costs on a screen
01

Full Monthly Cost Breakdown

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A detailed amortization table with monthly payment rows
02

Month-by-Month Amortization Table

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A chart showing the point where refinance savings exceed closing costs
03

Refinance Breakeven Analysis

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How It Works

Calculate your mortgage in three steps

1

Enter your loan details

Input the home price, down payment percentage, annual interest rate, and loan term. Optionally add monthly property tax, insurance, and HOA to get the all-in payment.

2

Click Calculate

The calculator applies the standard amortization formula to your loan amount (home price minus down payment) and produces your monthly payment, total interest, and full payment schedule.

3

Explore the Amortization and Insights tabs

Switch to Amortization for the month-by-month table, or Insights for a payment breakdown, loan summary, and balance milestones at 5, 10, 15, and 20 years.

Deep Dive

How the Calculator Works

The calculator applies the standard fixed-rate amortization formula and separates the loan payment from add-on housing costs to give you an accurate all-in monthly figure.

How the Calculator Works
01

Amortization Formula

Monthly principal and interest (P+I) is calculated as M = L x [c(1+c)^n] / [(1+c)^n - 1], where L is the loan amount after down payment, c is the monthly interest rate (annual rate divided by 12), and n is the total number of payments. Each month a slightly larger share goes to principal because the outstanding balance is smaller.

LHome price minus down payment
cAnnual rate / 12
nTerm in years x 12
02

Total Monthly Payment

The total payment shown in the results combines the amortized P+I with three optional add-ons you provide: monthly property tax (annual tax divided by 12), homeowners insurance premium, and any HOA fee. These do not reduce principal; they are collected by the servicer and paid to third parties.

TotalP+I + tax + insurance + HOA
03

Loan-to-Value and PMI

Loan-to-Value (LTV) is the loan amount as a percentage of the home price. When LTV exceeds 80% (down payment below 20%), lenders typically require Private Mortgage Insurance (PMI). PMI rates generally range from 0.5% to 1.5% of the loan amount per year and can be added to the insurance field to include it in your total payment estimate.

LTV(1 - down payment %) x 100
PMI thresholdLTV above 80%
04

Refinance Breakeven

The refinance tool solves for the month at which cumulative monthly savings from a lower rate exceed the one-time closing costs. It computes the old and new P+I payments for the remaining term, subtracts them to find the monthly saving, then divides closing costs by that saving. If the new rate is not lower than the current rate, no savings exist and the breakeven is reported as not achievable.

A breakeven under 24 months is generally considered favorable.

Benefits

What the Calculator Covers

🏠

All-In Monthly Cost

Combines P+I, taxes, insurance, and HOA in one total so there are no surprises.

📋

Full Amortization Table

Month-by-month breakdown of every payment, principal, interest, and balance.

🔄

Refinance Analysis

Instantly calculate the breakeven point for any refinance scenario.

📊

Balance Milestones

See your remaining balance at 5, 10, 15, and 20 years to track equity build-up.

Who Uses It

Who Uses This Calculator

Anyone buying, owning, or planning to refinance a home.

People at different stages of home buying and ownership
01

First-Time Homebuyers

Compare what you can actually afford by adjusting home price, down payment, and term to find a monthly payment that fits your budget before you start touring properties.

02

Move-Up Buyers

Model the payment on a more expensive home before listing your current one, so you know the exact monthly delta between your current mortgage and the new one.

03

Refinancing Homeowners

Enter your current balance, remaining term, and a new rate to see the breakeven point and decide whether refinancing is worth the closing costs right now.

04

Real Estate Investors

Quickly calculate the debt service on a rental property against projected rent to evaluate cash flow before making an offer.

05

Financial Planners and Advisors

Illustrate the lifetime interest cost of different terms or the effect of a larger down payment to help clients make informed borrowing decisions.

06

Renters Comparing Options

Run a mortgage scenario to compare the true monthly cost of owning versus renting, including taxes, insurance, and HOA, on a realistic home in your target market.

Frequently Asked Questions

What inputs does the calculator need?

The required inputs are home price, down payment percentage, annual interest rate, and loan term in years. Monthly property tax, homeowners insurance, and HOA fee are optional fields that add to the all-in monthly payment total without affecting the amortization calculation.

How does the loan term affect my payment and total cost?

A 30-year term produces a lower monthly payment but results in significantly more total interest paid over the life of the loan. A 15-year term roughly doubles the monthly payment on the same loan amount but typically cuts total interest by 50% or more because the principal is paid down twice as fast.

Does the calculator include property taxes and insurance?

Yes. Enter your estimated monthly property tax, homeowners insurance, and HOA fee in the optional fields. The calculator adds these to the principal and interest payment and shows both the base P+I and the total all-in monthly cost.

What is an amortization schedule?

An amortization schedule is a month-by-month table showing how each payment is divided between principal reduction and interest cost, and what the remaining loan balance will be after that payment. In the early years, most of each payment is interest; this ratio gradually shifts toward principal as the balance decreases.

What does the refinance breakeven tell me?

The breakeven point is the number of months you need to stay in the home after refinancing before the accumulated monthly savings exceed the one-time closing costs. If you plan to sell or move before that point, refinancing likely costs more than it saves. A breakeven under 24 months is generally considered favorable.

What is PMI and when is it required?

Private Mortgage Insurance (PMI) is required by most lenders when your down payment is less than 20% of the home price, meaning the loan-to-value ratio exceeds 80%. PMI typically costs 0.5% to 1.5% of the loan amount per year. You can model its cost by adding the monthly PMI amount to the insurance field.

Can I compare a 15-year vs. 30-year mortgage?

Yes. Run the calculator twice with the same inputs but different term values. The Insights tab shows total interest paid and the full loan summary for each scenario, making it straightforward to compare lifetime cost against the difference in monthly payment.

Get Started Free

Ready to Run Your Numbers?

Enter your home price and loan details to get a complete payment breakdown and amortization schedule in seconds.

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