1st Time Home Buyer Mortgage Calculator

Reviewed by: David Chen, CFA | Mortgage & Housing Market Analyst
Last Updated: October 2025

Buying your first home is a major milestone. Use our 1st time home buyer mortgage calculator to estimate your monthly payments, including low-down-payment options typical for first-time buyers (like FHA or Conventional 97 loans).

1st time home buyer mortgage calculator

The purchase price of the property.
First-time buyers often put down 3% – 3.5%.
Annual fixed interest rate.
Enter this ONLY if you want to calculate Affordability.
Estimated Monthly Principal & Interest
$0.00
Does not include Taxes, Insurance, or PMI

1st time home buyer mortgage calculator Formula

This calculator uses the standard mortgage amortization formula to determine your monthly Principal and Interest (P&I) payment.

M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]
Source: U.S. Department of Housing and Urban Development (HUD)

Variables

  • M: Total monthly payment.
  • P: Principal loan amount (Home Price minus Down Payment).
  • i: Monthly interest rate (Annual Rate / 12).
  • n: Total number of payments (Years * 12).

Related Calculators

What is a 1st Time Home Buyer Mortgage Calculator?

A 1st time home buyer mortgage calculator helps new market entrants understand their budget. Unlike repeat buyers who may have equity from a previous home to use as a large down payment, first-time buyers often utilize low-down-payment programs like FHA loans (3.5% down) or Conventional 97 loans (3% down).

This tool focuses on these scenarios, allowing you to input lower down payment percentages to see how they affect your monthly payment and total interest costs.

How to Calculate 1st Time Home Buyer Mortgage (Example)

  1. Determine Purchase Price: Enter the price of the home you are interested in (e.g., $300,000).
  2. Set Down Payment: For first-time buyers, this is often 3% or 3.5%. For a $300k home, 3% is $9,000.
  3. Subtract Down Payment: $300,000 – $9,000 = $291,000 (This is your Principal ‘P’).
  4. Calculate Monthly Payment: The calculator applies the interest rate to this principal over 30 years to find your monthly obligation.

Frequently Asked Questions (FAQ)

Do I need 20% down as a first-time buyer?

No. Most first-time buyers put down between 3% and 6%. Programs like FHA allow 3.5% down, and some conventional loans allow as little as 3%.

What is PMI?

Private Mortgage Insurance (PMI) is usually required if you put down less than 20%. It protects the lender if you default. Expect to pay $30-$70 per month for every $100,000 borrowed.

Does this calculator include taxes?

This tool calculates Principal and Interest. Property taxes and homeowners insurance vary widely by location and should be added to this figure to get your total “PITI” payment.

What credit score do first-time buyers need?

Generally, you need a score of at least 620 for a conventional loan or 580 for an FHA loan with a 3.5% down payment.

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