Loan Origination Fee Calculator Formula

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

Use the Loan Origination Fee Calculator

Formulas Used

Total Origination Fee

total_fee = total_origination

Percentage-Based Fee

percentage_fee = pct_fee

Total Fee as % of Loan

fee_as_pct_of_loan = total_origination / loan_amount * 100

Monthly Mortgage Payment

monthly_pmt = monthly_payment

Fee Spread Over Loan Life (per month)

fee_in_monthly_terms = total_origination / n

Variables

VariableDescriptionDefault
loan_amountLoan Amount(USD)350000
origination_pctOrigination Fee Percentage(%)1
flat_feeAdditional Flat Processing Fee(USD)500
interest_rateLoan Interest Rate(%)7
loan_term_yearsLoan Term(years)30
pct_feeDerived value= loan_amount * origination_pct / 100calculated
total_originationDerived value= pct_fee + flat_feecalculated
rDerived value= interest_rate / 100 / 12calculated
nDerived value= loan_term_years * 12calculated
monthly_paymentDerived value= r > 0 ? loan_amount * r * pow(1 + r, n) / (pow(1 + r, n) - 1) : loan_amount / ncalculated

How It Works

Loan Origination Fees

The origination fee compensates the lender for evaluating, processing, and approving your mortgage application.

Components

  • Percentage fee: Typically 0.5% to 1.5% of the loan amount
  • Flat processing fees: Additional administrative charges ($300-$900)

    • Negotiation Tips

  • Origination fees are negotiable; always ask for a reduction
  • Compare the total fee across multiple lenders, not just the percentage
  • A lower origination fee may come with a higher interest rate (and vice versa)
  • Some lenders advertise no origination fee but build the cost into the rate

    • Tax Treatment

    Origination fees (points) paid on a purchase loan are generally tax deductible in the year paid. On a refinance, they are deducted over the loan life.

    Worked Example

    A $350,000 loan with 1% origination fee plus a $500 flat processing fee.

    loan_amount = 350000origination_pct = 1flat_fee = 500interest_rate = 7loan_term_years = 30
    1. 01Percentage-based fee: $350,000 x 1% = $3,500
    2. 02Flat processing fee: $500
    3. 03Total origination fee: $3,500 + $500 = $4,000
    4. 04Fee as % of loan: $4,000 / $350,000 = 1.14%
    5. 05Monthly mortgage payment: $2,328.56
    6. 06Fee spread over 360 months: $4,000 / 360 = $11.11/month equivalent

    Frequently Asked Questions

    Is the origination fee the same as points?

    Not exactly. The origination fee covers the lender processing costs. Discount points are an optional upfront payment to reduce the interest rate. Both are expressed as a percentage of the loan, which causes confusion. The origination fee is mandatory; points are optional.

    Can I finance the origination fee into the loan?

    Sometimes. Some loan programs allow rolling closing costs including origination into the loan balance, but this increases the loan amount and total interest. You can also negotiate a seller credit or lender credit to cover the fee.

    What is a reasonable origination fee?

    A typical origination fee ranges from 0.5% to 1.5% of the loan amount. On a $350,000 loan, expect $1,750 to $5,250. Fees over 1.5% should be scrutinized, and you should always compare total costs across multiple lenders.

    Ready to run the numbers?

    Open Loan Origination Fee Calculator