Added at the end of each month. Leave empty for none.
For a savings account use its rate; for investments use a long-run expected return — real returns vary from year to year.
How often interest is added to the balance.
Future balance$54,713.58
Total contributions$34,000.00
Total interest$20,713.58
Effective annual rate (APY)7.23%
Equivalent monthly rate0.58%
Interest share of final balance37.86%

Interest compounds monthly at r ÷ 12 and contributions are added at the end of each month: FV = P(1 + r/12)12t + C × ((1 + r/12)12t − 1) ÷ (r/12).

Year-by-year growth
YearContributions to dateInterest to dateBalance
1$12,400$801$13,201
2$14,800$1,834$16,634
3$17,200$3,115$20,315
4$19,600$4,662$24,262
5$22,000$6,495$28,495
6$24,400$8,633$33,033
7$26,800$11,100$37,900
8$29,200$13,918$43,118
9$31,600$17,114$48,714
10$34,000$20,714$54,714

Compound Interest Calculator · free calculator by CalcWorthy