Whether you're taking out a car loan, personal loan, or planning to buy a home — knowing your monthly payment before you sign is essential. This guide explains how loan payments are calculated, what each number means, and includes a free built-in loan calculator you can use right now.
| # | Payment | Principal | Interest | Balance |
|---|
A loan payment is the fixed amount you pay each month to repay a debt over time. It's made up of two parts:
Early in the loan, most of your payment goes toward interest. Over time, more and more goes to principal. This is called amortization.
The standard formula for a fixed monthly payment is:
For example: a $200,000 mortgage at 6.5% APR over 30 years:
| Loan Type | Typical Amount | Typical Rate | Typical Term | Est. Monthly Payment |
|---|---|---|---|---|
| 30-Year Mortgage | $300,000 | 6.8% | 30 years | ~$1,957/mo |
| 15-Year Mortgage | $300,000 | 6.2% | 15 years | ~$2,573/mo |
| Car Loan | $35,000 | 7.5% | 5 years | ~$701/mo |
| Personal Loan | $10,000 | 11.0% | 3 years | ~$327/mo |
| Student Loan | $50,000 | 5.5% | 10 years | ~$542/mo |
Small changes make a huge difference over a long loan. Here are proven strategies:
On a $300,000 / 30-year / 6.8% mortgage, making just one extra payment per year can:
If your payment is $1,957, pay $2,000 instead. That extra $43/month goes entirely toward principal and accelerates payoff significantly.
Pay half your monthly payment every two weeks instead of one full payment monthly. Because there are 52 weeks in a year, this results in 26 half-payments = 13 full payments per year instead of 12.
If interest rates fall significantly (1%+ below your current rate), refinancing can lower your monthly payment or shorten your loan term. Use the calculator above to compare scenarios.
The amortization schedule shows every payment you'll make over the life of the loan. Key things to notice:
Click "Show Amortization Schedule" in the calculator above to see exactly how your loan breaks down month by month.
| Factor | Effect on Payment | Tips |
|---|---|---|
| Loan Amount | Higher = larger payment | Make a bigger down payment to reduce principal |
| Interest Rate | Higher = much larger total cost | Improve credit score; compare lenders |
| Loan Term | Longer = lower monthly, more total interest | 15-year saves ~$120K vs 30-year on $300K loan |
| Credit Score | Better score = lower rate offered | 760+ gets best mortgage rates |
| Down Payment | More down = smaller loan = lower payment | 20%+ avoids Private Mortgage Insurance (PMI) |
Lenders use your debt-to-income (DTI) ratio to decide how much to lend you:
Example: You earn $6,000/month gross. Your current car payment is $400 and credit card minimums are $150. That's $550 in existing debts. A lender at 36% DTI cap would allow maximum total debts of $2,160/month — meaning up to $1,610 for a new mortgage payment.
| Mortgage | Personal Loan | Car Loan | |
|---|---|---|---|
| Secured by | Real estate | Nothing (unsecured) | The vehicle |
| Typical rate | 6–8% (2026) | 8–25% | 6–12% |
| Typical term | 15–30 years | 1–7 years | 3–7 years |
| If you default | Foreclosure | Collections / credit damage | Repossession |
| Tax deductible? | Interest often deductible (US) | No | No (personal use) |
Ready to calculate your exact loan payment?
Use the Full Loan Calculator →Use the calculator at the top of this page — enter your loan amount, interest rate, and term, then click Calculate. For manual calculation: M = P × [r(1+r)^n] / [(1+r)^n − 1], where r is the monthly rate and n is total months.
For borrowers with good credit (700+), a rate of 6–12% APR is considered good for a personal loan. Rates above 20% are high and should be avoided if possible. Always compare at least 3 lenders before accepting an offer.
A common rule is the 28/36 rule: your mortgage payment should not exceed 28% of gross monthly income, and total debts should not exceed 36%. Use the calculator above to test different purchase prices until the monthly payment fits within 28% of your income.
Yes — any extra amount paid goes directly toward principal. On a $300,000 30-year mortgage at 6.8%, paying an extra $200/month can shave 6+ years off the loan and save over $90,000 in interest.
It's a month-by-month table showing each payment split between principal and interest, plus the remaining balance. Use the "Show Amortization Schedule" toggle in the calculator above to see yours.