Calculate your monthly payment, see the full amortization schedule, find how much you save by paying off early, and compare two loan offers side by side. Updated with 2026 average rates.
✓Verified: Standard Loan Amortization Formula — Consumer Financial Protection Bureau — April 2026
Total amount you want to borrowPlease enter a loan amount.
2026 avg: 7–36% depending on creditPlease enter an interest rate.
Common terms: 2, 3, 5, 7 yearsPlease enter a loan term.
Typically 1–8% — deducted from disbursement
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⚡ How much can you save by paying extra each month? Extra payments go directly to principal, reducing future interest charges and shortening your payoff date.
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Additional amount paid toward principal each monthEnter extra payment amount.
Loan A
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Loan B
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Monthly Payment
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📋 Full Amortization Schedule
Month
Payment
Principal
Interest
Balance
⚠️ Disclaimer: Results are estimates based on the loan amount, rate, and term entered. Actual loan terms and rates depend on your creditworthiness, lender policies, and current market conditions. This calculator does not constitute financial advice.
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Sources & Methodology
✅Loan amortization formula from Consumer Financial Protection Bureau (CFPB) standard. 2026 average personal loan rates sourced from Federal Reserve H.15 release and NerdWallet lender survey. All calculations use standard monthly compounding as required by Truth in Lending Act (TILA) Regulation Z.
Consumer Financial Protection Bureau (CFPB) — Loan Amortization Standards
Official amortization formula: M = P[r(1+r)^n]/[(1+r)^n-1]. Regulation Z (Truth in Lending Act) disclosure requirements for APR calculation and amortization schedule presentation.
Official source for current personal loan and consumer credit interest rate data. 2026 average rates for 24-month personal loans at commercial banks used as reference benchmarks.
Investopedia — EMI (Equated Monthly Installment) Formula
Standard EMI formula derivation and amortization methodology used by US banks, credit unions, and consumer lenders. Monthly compounding per US lending standard.
Monthly payment = P × [r(1+r)^n] ÷ [(1+r)^n - 1], where P = principal, r = APR÷12 (monthly rate), n = term in months. Amortization: each month, interest = balance × r, principal = payment − interest, new balance = balance − principal. Total interest = (payment × n) − P. For loans with origination fees, effective APR is calculated on disbursed amount. Early payoff simulates extra payments reducing principal monthly.
Last reviewed: April 2026
Personal Loan Calculator Guide — Monthly Payment, APR, and Amortization Explained
A personal loan is an unsecured installment loan with a fixed amount, fixed interest rate, and fixed monthly payment over a defined term. Unlike credit cards, personal loans have a definite payoff date — you know exactly when the debt will be gone. The three primary variables that determine your loan cost are the principal (amount borrowed), the APR (annual percentage rate), and the term (length of repayment).
The Loan Payment Formula (EMI Formula)
Every amortizing loan — personal loan, auto loan, mortgage — uses the same standard monthly payment formula, sometimes called the EMI (Equated Monthly Installment) formula. It calculates the exact fixed payment that, made every month, pays off both interest and principal over the specified term.
Monthly Payment (EMI) Formula
Monthly Payment = P × [r(1+r)^n] ÷ [(1+r)^n - 1]
P = Principal (loan amount) r = Monthly interest rate = Annual APR ÷ 12 n = Total payments = term in years × 12
Example: $10,000 at 12% APR for 3 years:
r = 0.12/12 = 0.01 | n = 36
Payment = 10000 × [0.01 × 1.01^36] ÷ [1.01^36 - 1]
Payment = 10000 × [0.01 × 1.4308] ÷ [0.4308] = $332.14/month
Total paid = $332.14 × 36 = $11,957. Total interest = $1,957
How Amortization Works — Why You Pay More Interest Early
Every monthly payment on an amortizing loan splits into two parts: interest and principal. In the early months, the loan balance is large, so the interest portion is large and the principal reduction is small. Over time, as the balance decreases, the interest portion shrinks and the principal portion grows. By the final months, almost the entire payment goes to principal with very little interest.
This is why making extra principal payments early in the loan saves the most money. An extra $100 payment in month 1 eliminates that $100 from the balance for all remaining months — so you avoid paying interest on that $100 for the next 59 months (on a 5-year loan). The same $100 extra payment in month 59 saves almost nothing because the balance is already nearly zero.
APR vs Interest Rate — Which Number to Compare
The interest rate is the annual cost of borrowing the principal only. APR (Annual Percentage Rate) adds origination fees and other charges to the interest rate, expressing the total annual cost of the loan as a single percentage. Under the Truth in Lending Act, lenders must disclose APR before you sign. Always compare loans by APR, not interest rate. A loan with a 9% interest rate and a 4% origination fee has an effective APR of about 11.5% on a 3-year term — worse than a loan with 10% interest rate and no fees.
Credit Score
2026 Avg APR Range
$15,000 / 3yr — Monthly
Total Interest
Excellent (750+)
7% – 12%
$464 – $498
$1,693 – $2,928
Good (700–749)
12% – 18%
$498 – $542
$2,928 – $4,507
Fair (650–699)
18% – 25%
$542 – $596
$4,507 – $6,450
Poor (below 650)
25% – 36%
$596 – $682
$6,450 – $9,556
Shorter vs Longer Loan Term — The Real Cost Difference
Choosing a longer loan term reduces your monthly payment but dramatically increases the total interest you pay. The table below shows how much more a 5-year term costs vs a 3-year term for the same loan at the same rate.
$15,000 at 10% APR
Monthly Payment
Total Interest
Total Paid
2-year term
$691
$1,579
$16,579
3-year term
$484
$2,424
$17,424
5-year term
$319
$4,122
$19,122
7-year term
$244
$5,484
$20,484
💡 Rule of Thumb: Choose the shortest loan term where the monthly payment fits comfortably in your budget (ideally no more than 10-15% of your monthly take-home pay). The difference in total interest between a 3-year and 5-year term on a $15,000 loan at 10% is $1,698 — that is real money you could have saved or invested.
Early Payoff — How Much You Can Save
Most personal loans allow prepayment without penalty (always verify before signing). Adding even $50–100/month to your standard payment can shave months off the term and save hundreds in interest. The savings are greater on higher balances, higher rates, and earlier in the loan term.
Loan: $20,000 at 12% APR, 5 years (payment: $445/mo)
Payoff Month
Total Interest
Interest Saved
Standard payment ($445/mo)
60
$6,697
—
+ $50/mo extra
56
$6,258
$439 saved
+ $100/mo extra
53
$5,862
$835 saved
+ $200/mo extra
47
$5,147
$1,550 saved
+ $500/mo extra
35
$3,666
$3,031 saved
Frequently Asked Questions
Monthly payment = P × [r(1+r)^n] ÷ [(1+r)^n - 1]. P = principal, r = APR÷12, n = months. For $10,000 at 12% APR for 3 years: r = 0.01, n = 36, payment = $332.14/month. Total interest = $332.14 × 36 − $10,000 = $1,957. Use Mode 1 above to calculate any loan instantly.
2026 personal loan APRs range from 7% (excellent credit, 750+) to 36% (poor credit). The Federal Reserve reports average personal loan rates at commercial banks around 11–13% for prime borrowers. Credit unions typically offer rates 1–3% lower than banks for their members. Online lenders offer quick funding but often higher rates for mid-range credit scores. Always pre-qualify with multiple lenders to find the best APR before applying.
The interest rate is the annual cost of borrowing the principal. APR includes the interest rate plus lender fees (origination, administrative). APR is always ≥ interest rate. Under TILA (Truth in Lending Act), lenders must disclose APR before you sign. Always compare loans by APR for an apples-to-apples cost comparison. A loan with 9% rate and 4% origination fee has ~11.5% APR on a 3-year term — more expensive than a 10% rate with no fees.
An amortization schedule shows every monthly payment broken into interest and principal portions, plus the remaining balance. Early payments are mostly interest because the balance is high. Later payments are mostly principal as the balance falls. The schedule is useful for understanding your total interest cost and seeing how quickly your balance decreases. Use Mode 2 above to generate a full schedule for any loan.
Significant savings are possible with even modest extra payments. On a $20,000 loan at 12% APR over 5 years, adding $100/month extra reduces payoff from 60 to 53 months and saves $835 in interest. The savings are proportionally larger on bigger loans and higher rates. Use Mode 3 above to calculate your exact savings for any extra payment amount.
Shorter terms (3 years) mean higher monthly payments but much less total interest. Longer terms (5-7 years) give lower payments but cost significantly more overall. For a $15,000 loan at 10% APR: 3 years = $484/month, total interest $2,424. 5 years = $319/month, total interest $4,122. The difference is $1,698 in interest. Choose the shortest term where the payment is comfortably affordable within your monthly budget.
An origination fee (1–8% of loan amount) is deducted from disbursement — you receive less than the loan amount but owe the full amount. A $10,000 loan with 5% origination fee: you receive $9,500, owe $10,000 plus interest. This increases the effective APR. Include origination fees in Mode 1 and Mode 4 above to see true cost comparisons between loan offers with different fee structures.
Most personal loans from major lenders, banks, and credit unions have no prepayment penalty. Some smaller lenders or certain loan types may charge 2–5% of the remaining balance. Always review the loan agreement for prepayment penalty clauses before signing. If your existing loan has a penalty, calculate whether the total interest savings exceed the penalty cost before paying off early.
Yes, when the personal loan APR is lower than your current credit card APRs. Credit cards typically charge 20–30% APR. A personal loan at 10–15% APR to consolidate that debt can save thousands in interest. Example: $15,000 credit card balance at 22% APR making minimum payments could take 15+ years. A personal loan at 12% APR over 3 years costs $2,928 total interest and pays off in exactly 36 months. Use Mode 4 to compare your current debt cost vs a consolidation loan.
Most lenders require 580–620 minimum, but rates are high below 650. For competitive rates below 15% APR, you need 700+. For the best rates (7–10% APR), you need 750+. Credit unions often offer better rates than banks for members, especially those with 660–720 scores. Pre-qualify with 3–5 lenders using soft credit checks (no score impact) before formally applying to find your best available rate.
Compare total interest paid (not just monthly payment) and factor in origination fees. A lower monthly payment on a longer-term loan may cost far more in total interest. Use Mode 4 (Compare Loans) above: enter both offers including any origination fees to see which loan costs less over its full life. Consider also: prepayment penalty terms, lender reputation, funding speed, and any special features.