Important Note : APR shown here is a rough estimate and may exclude lender fees and other finance charges. PMI shown here is simplified and actual cancellation rules commonly involve 80% request eligibility and 78% automatic termination for qualifying conventional loans.

Use this All-in-One Home Loan Calculator to estimate your monthly mortgage payment, loan amount, APR estimate, PMI, escrow costs, and total interest in one place. It is useful for comparing home-buying scenarios before you speak with a lender and for getting a clearer view of the full monthly cost beyond principal and interest alone.

Reviewed by: AjaxCalculators Editorial Team
Last updated: April 24, 2026
Method source: Standard fully amortizing loan-payment math, LTV math, escrow add-ons, and a rough APR estimate using entered discount points
Editorial standards: AjaxCalculators Editorial Policy

What This Home Loan Calculator Calculates

This calculator estimates:

• Loan amount (principal)
• Monthly principal and interest (P&I)
• Monthly escrow
• Total monthly payment
• Start loan-to-value (LTV)
• Estimated monthly PMI
• Total lifetime interest
• APR estimate

The live page also supports points, property tax rate, annual home insurance, HOA dues, and PMI rate so users can see a more complete housing-payment estimate than a basic mortgage calculator provides.

How the Home Loan Calculator Works

1) Loan Amount

The calculator first finds the loan amount:

Loan amount = home price − down payment

If you enter the down payment as a percentage, the page keeps the amount and percentage synced to the current home price.

2) Monthly Principal and Interest

For a standard fully amortizing fixed-rate mortgage, the monthly payment is based on:

M = P × [r(1 + r)ⁿ] ÷ [(1 + r)ⁿ − 1]

Where:

• M = monthly principal and interest payment
• P = loan principal
• r = monthly interest rate
• n = total number of monthly payments

This is the standard loan-amortization structure behind most fixed-rate mortgage calculators.

3) Monthly Escrow and Total Payment

The page then estimates monthly non-loan housing costs such as:

• property taxes
• home insurance
• HOA dues
• PMI when applicable

The total housing payment is then roughly:

Total monthly payment = monthly P&I + monthly escrow + HOA + estimated PMI

4) LTV and PMI

The calculator also estimates the starting loan-to-value ratio:

LTV = loan amount ÷ home price × 100%

This matters because PMI is commonly associated with lower down payments on conventional loans.

5) APR Estimate

The live tool includes an APR estimate and explicitly says that the estimate uses discount points when entered.

That is helpful, but users should understand that real mortgage APR is broader than the interest rate alone and can include points and other finance charges, not just the note rate.

Assumptions and Important Notes

• This calculator appears to assume a fully amortizing fixed-rate loan.
• The APR shown is an estimate, not a replacement for a lender’s official Loan Estimate or Closing Disclosure.
• Consumer Financial Protection Bureau guidance explains that mortgage APR is broader than interest rate and can include points, broker fees, and other charges paid to get the loan.
• The live page’s PMI logic is a simplified estimate. On many conventional loans, borrowers may request PMI cancellation around 80% of original value if conditions are met, while automatic termination commonly occurs when the scheduled principal balance reaches 78% of original value and the loan is current.
• Property taxes, insurance, HOA, PMI rules, and APR treatment can vary by loan type, lender, and jurisdiction.
• This calculator is best used for planning and comparison, not as a final loan disclosure.

Worked Example

Suppose you enter:

• Home price: $400,000
• Down payment: 20%
• Interest rate: 6.50%
• Loan term: 30 years
• Property tax: 1.20% per year of price
• Home insurance: $1,800 per year
• HOA: $75 per month

Step 1: Find the loan amount
Loan amount = 400,000 − 80,000 = $320,000

Step 2: Find the start LTV
LTV = 320,000 ÷ 400,000 × 100 = 80%

Step 3: Estimate monthly P&I
Using the standard fixed-rate amortization formula for 30 years at 6.50%, the monthly principal-and-interest payment is about $2,023.

Step 4: Estimate monthly escrow
Property tax = 1.20% × 400,000 = $4,800/year = $400/month
Insurance = 1,800/year = $150/month

Step 5: Add HOA
HOA = $75/month

Step 6: Estimate total monthly housing cost
Total monthly payment ≈ 2,023 + 400 + 150 + 75 = $2,648/month

This example shows why a home payment estimate should include more than principal and interest alone.

How to Use This Home Loan Calculator

1. Enter the home price.
2. Enter the down payment as either a percentage or amount.
3. Enter the interest rate and loan term.
4. Add points if you want a rough APR estimate that reflects discount points.
5. Enter property tax, annual insurance, HOA, and PMI rate if relevant.
6. Review monthly P&I, escrow, total monthly payment, LTV, PMI, total interest, and APR estimate.

How to Interpret the Result

Monthly P&I is the loan payment only.

Monthly escrow adds property-tax and insurance-style costs that many borrowers overlook when comparing homes.

Total monthly payment is usually the most practical planning number because it reflects the full recurring housing cost more closely than P&I alone.

LTV matters because it affects risk, down payment strength, and PMI exposure.

APR estimate is useful for rough comparison, but it is not a substitute for the lender’s official disclosure because real APR includes the timing and structure of finance charges in a regulated disclosure framework.

Practical Uses of an All-in-One Home Loan Calculator

• compare home-buying scenarios with different down payments
• see how rate changes affect monthly payment and lifetime interest
• estimate whether taxes, insurance, HOA, and PMI fit your budget
• compare note rate versus rough APR impact from points
• screen affordability before requesting lender quotes

References

1. AjaxCalculators live All-in-One Home Loan Calculator
2. CFPB: mortgage APR is broader than the interest rate and can include points and other charges
3. CFPB mortgage key terms: APR definition
4. CFPB Regulation Z: APR is a measure of the cost of credit relating amount and timing of value received and payments made
5. CFPB: PMI request cancellation at 80% and automatic termination at 78% for many conventional loans

Related Calculators

• Mortgage Calculator with Taxes and Insurance
• Mortgage/Loan Amortization Calculator
• Refinance Calculator
• Interest Rate Calculator

Disclaimer: This calculator is for educational and planning use only. It does not replace a lender’s official Loan Estimate, Closing Disclosure, or individualized underwriting decision.