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Personal Loan Payment Calculator

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Estimate monthly payments, total interest, and true cost on a fixed-rate personal loan—including origination fees.

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What is the monthly payment on a $15,000 personal loan at 11.5%?

At 11.5% APR for 5 years, $15,000 costs about $330 per month and roughly $4,800 in interest. The same amount over 3 years jumps to about $495 per month but saves nearly $2,000 in interest. If a 3% origination fee is financed, calculate on $15,450—not $15,000—so the payment reflects the true amount owed.

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This personal loan payment calculator estimates your monthly installment, total interest, and total repayment for unsecured fixed-rate borrowing. Enter loan amount, APR, and term, then model origination fees by adding them to the amount financed so you compare offers on total cost—not the advertised payment alone.

A personal loan payment calculator answers two questions: what will you pay each month, and how much interest will you pay over the full term. Fixed-rate installment loans use level payments—early months are interest-heavy, later months pay down principal faster.

Term length is the biggest lever after APR. On $15,000 at 11.5%, stretching from 3 to 5 years drops the payment by ~$165/month but adds nearly $2,000 in interest. Prefer the shortest term your budget can sustain after other debts and savings.

Origination fees often 1–6% are deducted from proceeds or rolled into the balance. If you need $15,000 cash and the lender finances a $450 fee, calculate on $15,450—not $15,000—or you will understate the payment.

Use this page to compare pre-qualification offers before soft-credit shopping turns into multiple hard pulls. Match each quote’s amount, APR, term, and fee treatment so the lowest payment is not mistaken for the cheapest loan.

Debt consolidation only helps when the new APR and fees beat your current average cost and you stop revolving new balances. Enter the consolidated balance as the loan amount and stress-test the payment against your monthly budget.

How to use this tool

Enter the cash you need (or the offer amount), the quoted APR, and term in years. If the lender charges an origination fee that is financed, add the fee to the loan amount before calculating. Review monthly payment and total interest, then rerun at a shorter term or lower APR to compare offers side by side.

Worked example

Example A — $15,000 at 11.5% for 5 years: about $330/month and ~$4,793 interest. Example B — same $15,000 at 11.5% for 3 years: about $495/month and ~$2,807 interest (higher payment, ~$1,986 less interest). Example C — $15,000 plus a 3% ($450) origination fee financed as $15,450 at 11.5% for 5 years: about $340/month—showing how fees raise the real payment even when APR is unchanged.

When to use this

  • Comparing pre-qualification offers from two or more lenders.
  • Checking whether consolidation lowers monthly outflow and total interest.
  • Budgeting a home improvement, medical, or major purchase loan.
  • Seeing how a 3-year vs 5-year term changes payment and interest.
  • Modeling an origination fee that is financed into the loan.

Common examples

  • $20,000 personal loan at 7% for 5 years → payment near $396/month with about $3,760 total interest over 60 payments.
  • $50,000 business loan at 8.5% for 7 years → payment near $792/month; total interest near $16,500—longer terms lower the monthly line item but raise lifetime cost.
  • $12,000 used-car repair loan at 12% for 3 years → payment near $399/month for a shorter payoff when you want to clear debt quickly.
  • $8,500 appliance financing at 11% for 24 months → payment near $395/month with moderate total interest.
  • $100,000 business term loan at 9% for 10 years → illustrates how longer horizons lower monthly cost but raise lifetime interest.

Common mistakes

  • Ignoring origination fees deducted from proceeds or rolled into the balance.
  • Using promotional rate quotes without checking your actual credit tier.
  • Choosing the longest term solely to minimize the monthly payment.
  • Borrowing the maximum without checking debt-to-income headroom.
  • Comparing two offers with different fees as if APR alone decides the winner.

How it works

Uses the standard amortizing loan formula: monthly payment = P × r × (1+r)^n / ((1+r)^n − 1). Converts the annual interest rate to a monthly rate and the term into monthly payments, then estimates monthly payment, total interest, and total payment. Optional upfront fees are added into total cost (payment stream plus fees).

Limitations

Outputs are amortization estimates for fixed-rate loans. Balloon payments, variable rates, and lender-specific fees are excluded.

Privacy and file handling

Your data stays on your device and is not uploaded.

Accuracy & methodology

This section documents how the calculator works, what it leaves out, and when results were last reviewed. Figures are educational estimates—not professional advice—and are not labeled "current" unless tied to automatically updated reference data.

Formula source or methodology
Amortizing payment: M = P × [r(1+r)^n] / [(1+r)^n − 1] with monthly rate r and n payments.
Jurisdiction
General
Unit system
Currency; percent annual rate; term in months/years
Rounding method
Currency amounts round to two decimal places (half up via Math.round × 100 / 100).
Assumptions
  • Fixed rate
  • Equal monthly payments
  • No extra payments
Known omissions
  • Not tax, legal, investment, or lending advice. Confirm material decisions with qualified professionals.
  • Origination fees, points, PMI/MIP, and lender-specific charges unless a field exists
  • Property taxes, insurance, and HOA unless explicitly entered
  • Prepayment penalties and variable or adjustable rates after the initial period
  • Tax deductibility of interest
Test cases (automated)
  • Positive principal and rate produce a finite monthly payment
  • Zero principal is rejected
Version & last verified

Logic version 1.0. Content and formulas last verified .

Important notice

Results are estimates for educational purposes and are not financial advice. Fees, insurance, and lender-specific terms may not be included. Consult a qualified financial professional for personal guidance.

Related Loan Calculator pages

These pages use the same loan calculator with examples tailored to different tasks.

Related comparisons

Learn how formats and terms differ before you convert or calculate.

FAQ

Frequently asked questions

How do I use a personal loan payment calculator?

Enter the loan amount, APR, and term. Calculate to see monthly payment and total interest. Add financed fees to the loan amount when comparing true cost across lenders.

Does this work for debt consolidation loans?

Yes. Enter the consolidated balance as the loan amount and the new lender's APR and term. Confirm the payment still fits after fees.

Are personal loan rates fixed?

Most personal installment loans are fixed-rate. Variable products are uncommon—confirm with your lender before relying on a single payment figure.

Does this include origination fees?

Not automatically. If fees are financed, add them to the loan amount. If fees are paid upfront, keep them out of the payment math but include them in total cash cost.

Should I pick a 3-year or 5-year personal loan?

A shorter term raises the monthly payment and usually cuts total interest. Run both terms on this page with the same amount and APR, then choose based on cash flow and lifetime cost.

Is the monthly payment a loan offer?

No. Results are planning estimates. Final APR, fees, and approval depend on underwriting and your credit profile.

Related pages

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