Personal Loan Calculator - Payment, Interest & Term

A personal loan calculator estimates the fixed monthly payment and scheduled borrowing cost for an installment loan. Enter the amount borrowed, annual interest rate, and number of monthly payments to see the payment, total interest, first-payment split, and total repayment. The optional purpose label helps you keep scenarios separate without changing the math.

• • Debt consolidation: Test whether one fixed payment could replace several credit card or medical balances, then compare modeled interest with the debts you would retire.
• • Home improvement: Set a project budget and term before requesting quotes so the monthly obligation is visible alongside the renovation cost.
• • Major purchases: Model furniture, equipment, moving, or other large expenses and see how a longer term changes the total dollars repaid.
• • Offer review: Run the principal, quoted rate, and term from each lender's disclosure to compare like-for-like scheduled payments.

This page models a fully amortizing, fixed-rate personal loan with monthly payments. Each payment contains an interest portion and a principal portion. At the beginning, interest is calculated from the larger outstanding balance; as principal falls, the interest portion generally becomes smaller and more of the same payment reduces the balance.

Use the result as a planning estimate, not as a lender offer. A lender may quote an APR that includes fees, use a different payment frequency, round installments differently, or add late charges and optional products. List existing rates and balances separately before deciding that a lower monthly payment also lowers the overall cost.

When several balances are the reason for borrowing, the Debt Consolidation Calculator helps compare the replacement payment with existing debt costs.

The calculator uses the standard present-value-of-an-ordinary-annuity approach for a fixed-rate amortizing loan. It converts the annual nominal rate to a monthly decimal rate, then solves for the equal payment that brings the balance to zero after the selected number of months.

• M: Fixed monthly payment in dollars.
• P: Original principal borrowed, excluding fees paid separately.
• r: Monthly decimal rate, calculated as annual percentage rate ÷ 100 ÷ 12.
• n: Number of monthly payments entered in the calculator.

For a zero-rate case, the formula's rate term would create a zero-over-zero expression, so the calculator uses the appropriate limit: principal divided by the number of payments. For example, $1,200 over 12 months produces a $100 payment and no scheduled interest. A one-month term is also straightforward: at 12% annually, one month of interest is 1%, so a $10,000 balance produces a $10,100 payment before fees.

OpenStax's Principles of Finance explains that monthly loan calculations divide the annual rate by 12, multiply the term by 12 when needed, and solve a present-value-of-an-annuity equation for the fixed payment. Read the OpenStax loan amortization treatment for the worked finance examples.

For a broader fixed-rate payment comparison across loan types, use the Loan Payment Calculator alongside this personal-loan scenario.

These four ideas explain why the displayed payment, total interest, and first-payment split change when you adjust an input.

The principal and interest percentages describe the entire scheduled repayment, not just the first installment. The first-payment rows show how the opening payment is divided, explaining why a stable payment can reduce the balance at a changing pace.

After estimating the new installment, the Debt-to-Income Ratio Calculator helps place that obligation beside monthly income and existing debts.

Use the quote or scenario you are reviewing, and keep the units consistent. The purpose selector is for organization only; it has no effect on the payment.

1. 1Enter the amount borrowed: Enter the principal in dollars, not the desired monthly payment or the lender's fee amount.
2. 2Enter the annual rate: Use the nominal annual interest rate from the loan disclosure. If you only have an APR, label the scenario clearly because APR can include fees.
3. 3Enter the repayment term: Type the term in years, such as 3 for a 36-payment schedule or 5 for a 60-payment schedule.
4. 4Choose a purpose if useful: Select debt consolidation, home improvement, medical expenses, a major purchase, moving, or another label to keep comparisons organized.
5. 5Review the payment split: Check monthly payment, total interest, scheduled repayment, first-payment allocation, and the whole-loan principal and interest shares.
6. 6Compare another scenario: Change one input at a time to see whether a lower payment comes from a lower rate, a smaller principal, or a longer term.

Suppose a lender quotes $25,000 at 8.5% for five years. Enter 25000, 8.5, and 5. The modeled payment is $512.91, scheduled interest is $5,774.80, and scheduled repayment is $30,774.80. Compare those figures with the lender's disclosure, including any origination fee.

When lender quotes differ in rate, term, or fees, the Loan Comparison Calculator provides a side-by-side scenario review.

A clear amortization estimate supports decisions before an application, during offer review, and while planning a debt payoff budget.

• • Budget the monthly obligation: See the scheduled payment before you commit to a principal amount, then compare it with dependable monthly cash flow.
• • Separate payment from cost: A lower monthly payment is not automatically cheaper; total interest and scheduled repayment expose the cost of extending the term.
• • Compare lender quotes: Place rate, principal, and term assumptions on the same basis before considering differences in fees, eligibility, or contract language.
• • Plan consolidation: Use the payment and total-interest outputs as a starting point for comparing one new installment with the balances it may replace.
• • Understand early amortization: The first-payment split shows why the opening balance can decline more slowly than a simple principal-divided-by-months estimate.
• • Test term trade-offs: Run shorter and longer terms to weigh a higher required payment against lower scheduled interest.

The most useful comparison changes one assumption at a time. Hold the principal and rate constant while moving from 36 to 60 months, then hold the term constant while changing the rate. This isolates the source of the payment change and avoids confusing a smaller loan with a better loan.

For debt consolidation, account for remaining balances, new spending on paid-off cards, and the difference between cash received and amount financed. The calculator describes the new schedule; it does not decide whether replacing old debt improves your position.

If your goal is to accelerate repayment, the Debt Payoff Calculator models payoff timing and extra-payment effects beyond the scheduled loan.

The calculator holds several contract details constant. These factors can change the offer you receive or the amount that ultimately leaves your account.

Limits to keep in mind:

• • This model covers scheduled principal and interest for a fixed nominal rate. It excludes origination fees, application charges, insurance, late fees, taxes, optional products, and prepayment charges.
• • The result is not an approval, an APR quote, or a payoff statement. Variable-rate, interest-only, deferred-payment, and balloon loans need a model that reflects their contract terms.
• • A lender may calculate interest using a different accrual convention or round each installment. Treat the lender's signed disclosure and payment schedule as the controlling figures.

The Consumer Financial Protection Bureau distinguishes the interest rate from APR: the interest rate is the cost of borrowing, while APR also includes additional lender fees such as origination charges. Use the calculator's rate field for the stated nominal rate, then review the disclosed APR and finance charge separately. Read the CFPB explanation of interest rate and APR.

Regulation Z disclosures can identify the amount financed, finance charge, annual percentage rate, and payment schedule for applicable closed-end consumer credit. Those disclosures are more complete than a payment-only estimate. If the numbers differ, check whether the lender financed a fee, used a different payment date, or included a charge outside this model. See current Regulation Z section 1026.18.

For a schedule that includes extra payments and a changing payoff date, continue with the Loan Repayment Calculator after reviewing the fixed-rate estimate.