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Investment projection

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See how your current savings and monthly investing grow with compound returns, year by year from your start age to age 100.

Balance when you stop at age 50

$1,326,833

Years of investing25
Total you add$300,000
Growth by age 50$1,026,833
Balance at age 65$5,909,609
Balance at age 100$213,078,901

Figures are in future dollars and do not account for inflation, taxes, or fees. At 3% inflation, prices roughly double every 24 years, so a dollar decades from now buys much less than today.

Year-by-year balance, age 25 to 100

Age	Added that year	Total invested (incl. current savings)	Total growth	Year-end balance
25	$12,000	$12,000	$566	$12,566
26	$12,000	$24,000	$2,447	$26,447
27	$12,000	$36,000	$5,782	$41,782
28	$12,000	$48,000	$10,722	$58,722
29	$12,000	$60,000	$17,437	$77,437
30	$12,000	$72,000	$26,111	$98,111
31	$12,000	$84,000	$36,950	$120,950
32	$12,000	$96,000	$50,181	$146,181
33	$12,000	$108,000	$66,054	$174,054
34	$12,000	$120,000	$84,845	$204,845
35	$12,000	$132,000	$106,860	$238,860
36	$12,000	$144,000	$132,438	$276,438
37	$12,000	$156,000	$161,950	$317,950
38	$12,000	$168,000	$195,809	$363,809
39	$12,000	$180,000	$234,470	$414,470
40	$12,000	$192,000	$278,436	$470,436
41	$12,000	$204,000	$328,263	$532,263
42	$12,000	$216,000	$384,563	$600,563
43	$12,000	$228,000	$448,016	$676,016
44	$12,000	$240,000	$519,369	$759,369
45	$12,000	$252,000	$599,450	$851,450
46	$12,000	$264,000	$689,174	$953,174
47	$12,000	$276,000	$789,549	$1,065,549
48	$12,000	$288,000	$901,692	$1,189,692
49	$12,000	$300,000	$1,026,833	$1,326,833
50	—	$300,000	$1,165,770	$1,465,770
51	—	$300,000	$1,319,255	$1,619,255
52	—	$300,000	$1,488,813	$1,788,813
53	—	$300,000	$1,676,125	$1,976,125
54	—	$300,000	$1,883,051	$2,183,051
55	—	$300,000	$2,111,645	$2,411,645
56	—	$300,000	$2,364,176	$2,664,176
57	—	$300,000	$2,643,150	$2,943,150
58	—	$300,000	$2,951,336	$3,251,336
59	—	$300,000	$3,291,793	$3,591,793
60	—	$300,000	$3,667,901	$3,967,901
61	—	$300,000	$4,083,392	$4,383,392
62	—	$300,000	$4,542,390	$4,842,390
63	—	$300,000	$5,049,452	$5,349,452
64	—	$300,000	$5,609,609	$5,909,609
65	—	$300,000	$6,228,423	$6,528,423
66	—	$300,000	$6,912,034	$7,212,034
67	—	$300,000	$7,667,228	$7,967,228
68	—	$300,000	$8,501,501	$8,801,501
69	—	$300,000	$9,423,133	$9,723,133
70	—	$300,000	$10,441,272	$10,741,272
71	—	$300,000	$11,566,023	$11,866,023
72	—	$300,000	$12,808,551	$13,108,551
73	—	$300,000	$14,181,188	$14,481,188
74	—	$300,000	$15,697,557	$15,997,557
75	—	$300,000	$17,372,711	$17,672,711
76	—	$300,000	$19,223,274	$19,523,274
77	—	$300,000	$21,267,616	$21,567,616
78	—	$300,000	$23,526,028	$23,826,028
79	—	$300,000	$26,020,924	$26,320,924
80	—	$300,000	$28,777,069	$29,077,069
81	—	$300,000	$31,821,818	$32,121,818
82	—	$300,000	$35,185,392	$35,485,392
83	—	$300,000	$38,901,176	$39,201,176
84	—	$300,000	$43,006,052	$43,306,052
85	—	$300,000	$47,540,761	$47,840,761
86	—	$300,000	$52,550,314	$52,850,314
87	—	$300,000	$58,084,432	$58,384,432
88	—	$300,000	$64,198,045	$64,498,045
89	—	$300,000	$70,951,834	$71,251,834
90	—	$300,000	$78,412,832	$78,712,832
91	—	$300,000	$86,655,094	$86,955,094
92	—	$300,000	$95,760,428	$96,060,428
93	—	$300,000	$105,819,210	$106,119,210
94	—	$300,000	$116,931,279	$117,231,279
95	—	$300,000	$129,206,925	$129,506,925
96	—	$300,000	$142,767,993	$143,067,993
97	—	$300,000	$157,749,081	$158,049,081
98	—	$300,000	$174,298,885	$174,598,885
99	—	$300,000	$192,581,670	$192,881,670
100	—	$300,000	$212,778,901	$213,078,901

How this calculator works

You start with any savings you already have, then invest the same amount every month from your start age until the age you stop. Returns compound monthly, so each month you earn growth on everything invested so far plus all earlier growth. After you stop adding money, the balance keeps compounding on its own, which is why starting early matters so much: money invested in your twenties has decades longer to grow. A 10% yearly return is close to the long-run average of the U.S. stock market before inflation, but real returns vary a lot from year to year, and some years are negative.

A worked example

The example invests $1,000 a month from age 25 to age 50 at a 10% annual return. That is $300,000 of your own money over 25 years. At 50 the balance is about $1,326,833, so roughly $1,026,833 of it is growth.

Then the contributions stop and the balance keeps compounding. By 65 it is about $5.9 million. Compare that with someone who makes the same 25 years of contributions but starts at 35 and stops at 60: they also reach about $1,326,833 when they stop, but have only about $2.2 million at 65. Ten extra years of compounding makes the difference.

The return you assume matters just as much. At 7% the same plan reaches about $810,000 at 50 and $2.3 million at 65.

How to read your results

The year-by-year table is the part worth studying. The "Total growth" column starts small and overtakes "Total invested" after a number of years. From then on, your money is earning more each year than you are adding.

All figures are future dollars. Prices will be higher too. At 3% inflation, prices about double every 24 years, so the buying power of a balance 40 years from now is roughly a third of what the number suggests. The balances at very old ages are there to show how compounding works, not to predict anything.

Common mistakes to avoid

Treating the average return as a promise. A 10% long-run average includes years of 25% gains and years of 20% losses. Try 6% or 7% as well to see a more cautious picture.
Ignoring fees. A fund that charges 1% a year effectively turns a 7% return into 6%. Over decades that is a large share of the final balance.
Waiting for a better time to start. The example shows what a ten-year delay costs. Time in the market does most of the work.
Stopping after a bad year. Regular monthly investing buys more shares when prices are low. Stopping at the bottom locks in the worst of it.

Common questions

What annual return should I use?

The U.S. stock market has averaged roughly 10% a year over the long run before inflation, or about 6% to 7% after inflation. A mix of stocks and bonds earns less. Try several rates to see a range of outcomes.

Does this account for inflation?

No. Balances are in future dollars. To see results in today's buying power, lower the return by your inflation assumption, for example 7% in place of 10%.

Why does the table go to age 100?

To show that money keeps compounding long after you stop adding to it. It also lets you read off the balance at any age that matters to you.

Are taxes included?

No. In a 401(k) or IRA, growth is not taxed each year, which is close to what this shows. In a regular brokerage account, taxes on dividends and gains reduce the result.

Written and maintained by the founder of MoneyLifeCalc, an architectural designer and individual investor of more than 30 years. Last reviewed October 2026. About · How we calculate

Disclaimer: This page is for education only and is not investment advice. Returns are not guaranteed, past market performance does not predict future results, and investments can lose value. Consider talking with a licensed financial professional before investing.

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