Loan Amortization Calculator
Calculate complete loan payment schedule with detailed interest breakdowns and strategic payoff optimization.
Cost Breakdown
Balance Curve
Repayment Schedule
Surgical month-by-month financial breakdown.
| # | Date | Payment | Principal | Interest | Balance |
|---|---|---|---|---|---|
| 1 | Jul 2026 | $1,419.47 | +$273.64 | -$1,145.83 | $249,726.36 |
| 2 | Aug 2026 | $1,419.47 | +$274.89 | -$1,144.58 | $249,451.47 |
| 3 | Sep 2026 | $1,419.47 | +$276.15 | -$1,143.32 | $249,175.31 |
| 4 | Oct 2026 | $1,419.47 | +$277.42 | -$1,142.05 | $248,897.90 |
| 5 | Nov 2026 | $1,419.47 | +$278.69 | -$1,140.78 | $248,619.20 |
| 6 | Dec 2026 | $1,419.47 | +$279.97 | -$1,139.50 | $248,339.24 |
| 7 | Jan 2027 | $1,419.47 | +$281.25 | -$1,138.22 | $248,057.99 |
| 8 | Feb 2027 | $1,419.47 | +$282.54 | -$1,136.93 | $247,775.45 |
| 9 | Mar 2027 | $1,419.47 | +$283.84 | -$1,135.64 | $247,491.61 |
| 10 | Apr 2027 | $1,419.47 | +$285.14 | -$1,134.34 | $247,206.47 |
| 11 | May 2027 | $1,419.47 | +$286.44 | -$1,133.03 | $246,920.03 |
| 12 | Jun 2027 | $1,419.47 | +$287.76 | -$1,131.72 | $246,632.28 |
Industrial Calculation Workflow
Parameterization
Input your principal, rate, and desired loan duration.
Optimization
Add extra repayments to see exponential interest savings.
Analysis
Audit the surgical schedule and export for documentation.
Technical FAQ
What is loan amortization?
How do extra payments impact the curve?
Why is interest skewed to the start?
Where Each Installment Actually Goes
The split nobody shows you at signing
Every installment divides between interest (the bank's share) and principal (your share). Early on, the split is brutal:
| Stage of a 20-year loan | Typical interest share | What it means |
|---|---|---|
| Year 1 | 80–90% of each payment | You barely dent the principal |
| Year 5 | 70–80% | Equity grows, slowly |
| Year 10 (midpoint) | Roughly half | Only now is half each payment yours |
| Final years | 10–20% | Payments finally attack the balance |
Why early extra payments punch above their weight
Interest accrues on the outstanding balance, so a rupee of principal paid in year one stops generating interest for the entire remaining term. The same extra payment in year fifteen saves a fraction as much. The schedule makes this concrete: find the row where your extra payment lands, and watch every subsequent interest figure shrink. It also explains the unpleasant refinance truth — restarting a loan after years of paying means returning to the interest-heavy rows.
Reading the schedule before signing
Two numbers deserve attention: total interest over the full term (often rivaling the principal itself on long loans), and the balance at years 5 and 10 (what you'd still owe if you sold or refinanced). Compare monthly affordability scenarios in the EMI calculator, house-purchase specifics in the mortgage calculator, and convert flat-vs-reducing rate quotes honestly with the percentage calculator.