Compound Interest Calculator

Currency:

Mode:

Initial investment:

Interest rate:

% Annual

Additional contributions:

Annual deposit % increase?

Invest for...

Years:

Months:

With

Inflation:

Account fees

Account fee:

Fees capped at:

Monthly trading fee:

Fund fees:

Projection for 10 years, 0 months

Future balance

£8,144.47

Interest earned

£3,144.47

Total deposits

£5,000.00

Year	Interest	Balance
0	—	£5,000.00
1	£250.00	£5,250.00
2	£262.50	£5,512.50
3	£275.63	£5,788.13
4	£289.41	£6,077.53
5	£303.88	£6,381.41
6	£319.07	£6,700.48
7	£335.02	£7,035.50
8	£351.78	£7,387.28
9	£369.36	£7,756.64
10	£387.83	£8,144.47
Export to Excel

Month	Interest	Balance
0	—	£5,000.00
1	£20.83	£5,000.00
2	£20.83	£5,000.00
3	£20.83	£5,000.00
4	£20.83	£5,000.00
5	£20.83	£5,000.00
6	£20.83	£5,000.00
7	£20.83	£5,000.00
8	£20.83	£5,000.00
9	£20.83	£5,000.00
10	£20.83	£5,000.00
11	£20.83	£5,000.00
12	£20.83	£5,250.00
13	£21.88	£5,250.00
14	£21.88	£5,250.00
15	£21.88	£5,250.00
16	£21.88	£5,250.00
17	£21.88	£5,250.00
18	£21.88	£5,250.00
19	£21.88	£5,250.00
20	£21.88	£5,250.00
21	£21.88	£5,250.00
22	£21.88	£5,250.00
23	£21.88	£5,250.00
24	£21.88	£5,512.50
25	£22.97	£5,512.50
26	£22.97	£5,512.50
27	£22.97	£5,512.50
28	£22.97	£5,512.50
29	£22.97	£5,512.50
30	£22.97	£5,512.50
31	£22.97	£5,512.50
32	£22.97	£5,512.50
33	£22.97	£5,512.50
34	£22.97	£5,512.50
35	£22.97	£5,512.50
36	£22.97	£5,788.13
37	£24.12	£5,788.13
38	£24.12	£5,788.13
39	£24.12	£5,788.13
40	£24.12	£5,788.13
41	£24.12	£5,788.13
42	£24.12	£5,788.13
43	£24.12	£5,788.13
44	£24.12	£5,788.13
45	£24.12	£5,788.13
46	£24.12	£5,788.13
47	£24.12	£5,788.13
48	£24.12	£6,077.53
49	£25.32	£6,077.53
50	£25.32	£6,077.53
51	£25.32	£6,077.53
52	£25.32	£6,077.53
53	£25.32	£6,077.53
54	£25.32	£6,077.53
55	£25.32	£6,077.53
56	£25.32	£6,077.53
57	£25.32	£6,077.53
58	£25.32	£6,077.53
59	£25.32	£6,077.53
60	£25.32	£6,381.41
61	£26.59	£6,381.41
62	£26.59	£6,381.41
63	£26.59	£6,381.41
64	£26.59	£6,381.41
65	£26.59	£6,381.41
66	£26.59	£6,381.41
67	£26.59	£6,381.41
68	£26.59	£6,381.41
69	£26.59	£6,381.41
70	£26.59	£6,381.41
71	£26.59	£6,381.41
72	£26.59	£6,700.48
73	£27.92	£6,700.48
74	£27.92	£6,700.48
75	£27.92	£6,700.48
76	£27.92	£6,700.48
77	£27.92	£6,700.48
78	£27.92	£6,700.48
79	£27.92	£6,700.48
80	£27.92	£6,700.48
81	£27.92	£6,700.48
82	£27.92	£6,700.48
83	£27.92	£6,700.48
84	£27.92	£7,035.50
85	£29.31	£7,035.50
86	£29.31	£7,035.50
87	£29.31	£7,035.50
88	£29.31	£7,035.50
89	£29.31	£7,035.50
90	£29.31	£7,035.50
91	£29.31	£7,035.50
92	£29.31	£7,035.50
93	£29.31	£7,035.50
94	£29.31	£7,035.50
95	£29.31	£7,035.50
96	£29.31	£7,387.28
97	£30.78	£7,387.28
98	£30.78	£7,387.28
99	£30.78	£7,387.28
100	£30.78	£7,387.28
101	£30.78	£7,387.28
102	£30.78	£7,387.28
103	£30.78	£7,387.28
104	£30.78	£7,387.28
105	£30.78	£7,387.28
106	£30.78	£7,387.28
107	£30.78	£7,387.28
108	£30.78	£7,756.64
109	£32.32	£7,756.64
110	£32.32	£7,756.64
111	£32.32	£7,756.64
112	£32.32	£7,756.64
113	£32.32	£7,756.64
114	£32.32	£7,756.64
115	£32.32	£7,756.64
116	£32.32	£7,756.64
117	£32.32	£7,756.64
118	£32.32	£7,756.64
119	£32.32	£7,756.64
120	£32.32	£8,144.47
Export to Excel

Use this calculator to estimate the growth of your investment over time with compound interest. Simply enter the initial amount, interest rate, compounding frequency, and investment duration to see how your money can grow.

Values are for illustrative purposes only – this is not financial advice. We will not be held liable for monetary losses arising from using our calculator or other resources.

This calculator assumes you deposit at the start of a period (month, quarter, year) for simplicity. If you deposit later in the time period, the results will be slightly different.

The compound interest calculator for investors

Financial Interest’s compound interest calculator was designed for investors, though savers can still use the ‘Simple’ mode to forecast savings returns. Use the ‘Advanced’ mode to forecast potential investment returns – and if we’re being pedantic, it doesn’t focus on interest at all.

When investing, returns are delivered in the form of capital appreciation – the price of assets going up – rather than interest. There are also dividends, but capital appreciation is where people have seen the majority of growth in the past, and it’s what they’re typically referring to when they think of “interest” in the investing world. However, people would look at you funny if you said you used a ‘compound capital appreciation calculator’, so here we are.

Please remember that the value of your assets can go down when investing. This calculator does not forecast or simulate guaranteed returns. Every investment has risk.