Loan Calculator
What is an amortized loan schedule?
An amortized loan schedule is a month-by-month breakdown of how your loan gets paid off over time. Every payment is split into two parts: interest and principal. In the early years, more of your payment goes to interest. Later, more goes toward principal.
This is why two borrowers with the same loan amount can end up paying very different totals—especially if one adds even small extra payments each month.
How this amortization calculator helps
This tool calculates your fixed monthly payment and generates a full amortization table so you can see:
- Your required monthly payment
- Total interest cost over the full loan
- Your projected payoff date
- The impact of extra monthly payments
Whether you're comparing mortgage options, auto loans, or personal loans, this gives you a practical cash-flow view instead of just a headline APR.
Understanding the numbers in your schedule
1) Payment
The amount you pay each month. If you enter an extra monthly payment, that amount is added automatically.
2) Principal
This is the portion of your payment that reduces the original loan balance.
3) Interest
Interest is what the lender charges for borrowing money. It's based on your remaining balance, so it declines over time.
4) Remaining balance
Your outstanding loan amount after each payment. Once it reaches zero, the loan is fully paid off.
Why extra payments are so powerful
Extra payments attack the principal directly. That means future interest is calculated on a smaller balance. Even a modest extra amount can reduce years from your loan and save a meaningful amount of money.
- $50/month extra can shave months or years off long-term loans
- $100/month extra can produce major lifetime interest savings
- One-time bonus payments can have similar effects
Best practices when using an amortization schedule
- Compare multiple interest rates before choosing a lender.
- Test different loan terms (15, 20, 30 years) to balance payment size and total cost.
- Check whether your lender has prepayment penalties.
- Review your schedule annually and re-run calculations if rates or income change.
Frequently asked questions
Does this work for mortgages and auto loans?
Yes. Any fixed-rate amortized loan can be modeled with this calculator.
What if my interest rate is 0%?
The calculator handles 0% loans by dividing principal evenly over the loan term.
Can I use decimal years?
This version uses full years and converts to months for a clear payment schedule.
Final thoughts
A loan is not just a payment—it's a long-term financial path. Understanding your amortized loan schedule lets you make better decisions, reduce interest, and gain control over your debt timeline. Try different scenarios above and choose the one that aligns with your goals.