VA Loan Calculator Formula

Understand the math behind the va loan calculator. Each variable explained with a worked example.

Use the VA Loan Calculator

Formulas Used

Monthly Payment (P&I)

payment = monthly_payment

VA Funding Fee

funding_fee_amt = funding_fee

Total Loan Amount

total_loan_amt = total_loan

Total Amount Paid

total_paid = monthly_payment * n

Total Interest

total_interest = monthly_payment * n - total_loan

Variables

VariableDescriptionDefault
home_priceHome Purchase Price(USD)350000
down_paymentDown Payment(USD)0
interest_rateInterest Rate(%)6.25
loan_term_yearsLoan Term(years)30
funding_fee_pctVA Funding Fee(%)2.15
finance_funding_feeFinance Funding Fee? (1=Yes, 0=No)1
base_loanDerived value= home_price - down_paymentcalculated
funding_feeDerived value= base_loan * funding_fee_pct / 100calculated
total_loanDerived value= finance_funding_fee >= 1 ? base_loan + funding_fee : base_loancalculated
rDerived value= interest_rate / 100 / 12calculated
nDerived value= loan_term_years * 12calculated
monthly_paymentDerived value= r > 0 ? total_loan * r * pow(1 + r, n) / (pow(1 + r, n) - 1) : total_loan / ncalculated

How It Works

VA Loan Benefits

VA loans are available to eligible veterans, active-duty service members, and surviving spouses. They offer significant advantages over conventional financing.

Key Features

  • No down payment required (100% financing)
  • No PMI or MIP ever
  • Competitive interest rates, often lower than conventional
  • No prepayment penalty

    • VA Funding Fee

    Instead of mortgage insurance, VA loans have a one-time funding fee:

  • First-time use, no down payment: 2.15%
  • Subsequent use, no down payment: 3.30%
  • With 5% down: 1.50%
  • With 10%+ down: 1.25%
  • Exempt: Veterans with service-connected disability

    • The funding fee can be financed into the loan or paid at closing.

    Worked Example

    A $350,000 home with $0 down, 6.25% rate, 30-year term, 2.15% funding fee financed.

    home_price = 350000down_payment = 0interest_rate = 6.25loan_term_years = 30funding_fee_pct = 2.15finance_funding_fee = 1
    1. 01Base loan: $350,000 - $0 = $350,000
    2. 02VA funding fee: $350,000 x 2.15% = $7,525
    3. 03Total loan (fee financed): $350,000 + $7,525 = $357,525
    4. 04Monthly payment: $357,525 over 360 months at 6.25% = $2,201.37
    5. 05Total paid: $2,201.37 x 360 = $792,493
    6. 06Total interest: $792,493 - $357,525 = $434,968

    Frequently Asked Questions

    Who is eligible for a VA loan?

    Veterans with at least 90 days of wartime service or 181 days of peacetime service, active-duty members with 90+ days served, National Guard and Reserve members with 6+ years, and surviving spouses of veterans who died in service or from service-connected disability.

    Can I use a VA loan more than once?

    Yes. VA loan entitlement can be reused after paying off the previous VA loan. You can even have two VA loans simultaneously if you have remaining entitlement. The funding fee increases on subsequent use.

    Is the VA funding fee worth paying?

    The funding fee replaces monthly mortgage insurance, which saves money over time. A 2.15% fee on $350,000 is $7,525, while conventional PMI at 0.5% would cost $1,750/year until reaching 80% LTV. For long-term owners, the one-time fee is usually cheaper.

    Ready to run the numbers?

    Open VA Loan Calculator