Loan Calculator
Estimate fixed monthly principal and interest payments and total borrowing cost.
Money & Planning · FREE TO USE
Savings Goal & Monthly Deposit Planner
Model progress toward a goal with explicit deposits, interest and a bounded horizon.
02EXAMPLE RESULT
Months to reach the goal
18
Final savings5,000.00USD
Total modeled interest0.00USD
Total new deposits4,500.00USD
Results update as you type. Calculate adds a snapshot to your history.
Inspect the monthly scenario
All money columns use the same currency. This models operating profit and cumulative surplus, with the exclusions stated below.
| Month | Interest | Deposit | Savings |
|---|---|---|---|
| 1 | 0.00 | 250.00 | 750.00 |
| 2 | 0.00 | 250.00 | 1000.00 |
| 3 | 0.00 | 250.00 | 1250.00 |
| 4 | 0.00 | 250.00 | 1500.00 |
| 5 | 0.00 | 250.00 | 1750.00 |
| 6 | 0.00 | 250.00 | 2000.00 |
| 7 | 0.00 | 250.00 | 2250.00 |
| 8 | 0.00 | 250.00 | 2500.00 |
| 9 | 0.00 | 250.00 | 2750.00 |
| 10 | 0.00 | 250.00 | 3000.00 |
| 11 | 0.00 | 250.00 | 3250.00 |
| 12 | 0.00 | 250.00 | 3500.00 |
| 13 | 0.00 | 250.00 | 3750.00 |
| 14 | 0.00 | 250.00 | 4000.00 |
| 15 | 0.00 | 250.00 | 4250.00 |
| 16 | 0.00 | 250.00 | 4500.00 |
| 17 | 0.00 | 250.00 | 4750.00 |
| 18 | 0.00 | 250.00 | 5000.00 |
How this calculation works
An assumption model with constant deposits and rate. A nominal annual rate divided by 12 is not an advertised APY or AER. Interest rounds each month. Tax, inflation, fees, withdrawals and changing returns are excluded. Zero interest is a useful starting scenario; no return is promised.
Monthly interest = round(opening savings × nominal APR / 1200); then add the monthly deposit. Stop at the first modeled month that meets the target.
Your calculation, step by step
- Round modeled monthly interest to the currency’s minor unit.
- Add the deposit at each month end.
- Stop at the target or bounded horizon.
A worked example
Starting with 500 toward a 5,000 goal, deposits of 250/month and no interest reach the goal in 18 months.
Work through an example.
Inspect the assumptions and limits before applying a result.