Retirement Savings Calculator

Project a retirement savings balance to a target age from your current savings, monthly contributions and an assumed growth rate — year-by-year arithmetic, nothing more. Runs entirely in your browser — your numbers never leave this device.

Current ageRetirement ageCurrent savings$Monthly contribution$Annual return%

Projected balance at retirement

$606,519.74

At age 65, after 40 years of saving.

Total contributed: $101,000.00
Growth (interest earned): $505,519.74
Years of saving: 40

Year by year

Age	Balance	Contributed	Growth
26	$7,839.97	$7,400.00	$439.97
27	$10,885.24	$9,800.00	$1,085.24
28	$14,150.65	$12,200.00	$1,950.65
29	$17,652.12	$14,600.00	$3,052.12
30	$21,406.71	$17,000.00	$4,406.71
31	$25,432.72	$19,400.00	$6,032.72
32	$29,749.77	$21,800.00	$7,949.77
33	$34,378.90	$24,200.00	$10,178.90
34	$39,342.67	$26,600.00	$12,742.67
35	$44,665.27	$29,000.00	$15,665.27
36	$50,372.64	$31,400.00	$18,972.64
37	$56,492.60	$33,800.00	$22,692.60
38	$63,054.97	$36,200.00	$26,854.97
39	$70,091.74	$38,600.00	$31,491.74
40	$77,637.19	$41,000.00	$36,637.19
41	$85,728.11	$43,400.00	$42,328.11
42	$94,403.92	$45,800.00	$48,603.92
43	$103,706.90	$48,200.00	$55,506.90
44	$113,682.40	$50,600.00	$63,082.40
45	$124,379.03	$53,000.00	$71,379.03
46	$135,848.91	$55,400.00	$80,448.91
47	$148,147.96	$57,800.00	$90,347.96
48	$161,336.10	$60,200.00	$101,136.10
49	$175,477.62	$62,600.00	$112,877.62
50	$190,641.43	$65,000.00	$125,641.43
51	$206,901.43	$67,400.00	$139,501.43
52	$224,336.87	$69,800.00	$154,536.87
53	$243,032.72	$72,200.00	$170,832.72
54	$263,080.09	$74,600.00	$188,480.09
55	$284,576.69	$77,000.00	$207,576.69
56	$307,627.28	$79,400.00	$228,227.28
57	$332,344.19	$81,800.00	$250,544.19
58	$358,847.90	$84,200.00	$274,647.90
59	$387,267.56	$86,600.00	$300,667.56
60	$417,741.68	$89,000.00	$328,741.68
61	$450,418.78	$91,400.00	$359,018.78
62	$485,458.10	$93,800.00	$391,658.10
63	$523,030.43	$96,200.00	$426,830.43
64	$563,318.85	$98,600.00	$464,718.85
65	$606,519.74	$101,000.00	$505,519.74

This is a projection using one steady return — real returns vary year to year. It is arithmetic, not financial advice.

How it works

Projected balance = current balance × (1 + r/12)^(12×years) + monthly contribution × ((1 + r/12)^(12×years) − 1) / (r/12), where r = assumed annual growth rate and years = target age − current age

Projected balance at 7% assumed growth, $300/month contributions, no starting balance

Years of contributions	Total contributed	Projected balance
10	$36,000	≈ $51,925
20	$72,000	≈ $156,278
30	$108,000	≈ $365,991
40	$144,000	≈ $787,444

This calculator performs one piece of arithmetic: it compounds a current balance and a stream of monthly contributions forward to a target age at a growth rate you enter, and prints the balance at the end of every year on the way. The current balance grows for the full period; each contribution grows only from the month it is made, which is why contributions made in the early years carry more weight in the final figure than the same contributions made later.

A note that belongs in the method, not the small print: this is projection maths only. The rate is an assumption you supply, real returns arrive unevenly and not at all in some years, and the output is simply what the stated inputs produce. Nothing on this page is financial advice — there are no recommended contribution amounts, no recommended ages and no suggested rates anywhere in the tool, because the right figures depend on circumstances a calculator cannot see.

The useful way to read the output is comparatively. Hold the ages fixed and vary the rate to see how sensitive the outcome is to the assumption; then hold the rate fixed and vary the contribution to see the effect of the one variable that is actually a monthly cash amount. The year table exists for exactly that checking: the balance grows slowly for many years and steeply near the end, and seeing where your own plan sits on that curve is the point of the projection.

Worked examples

Contributions only: $300 a month for 40 years at 7%

Input: Current balance = $0, Contribution = $300/month, Assumed growth = 7% per year, Period = 40 years
Working: Monthly rate = 7 / 1200 ≈ 0.005833, periods = 480. Future value of contributions = 300 × ((1.005833)^480 − 1) / 0.005833 ≈ $787,444.02. Total contributed = 300 × 480 = $144,000, so the assumed growth accounts for ≈ $643,444.02 of the projected balance.
Result: Projected balance ≈ $787,444.02 from $144,000 contributed, at the assumed 7% rate

$500 a month for 30 years at 7%

Input: Current balance = $0, Contribution = $500/month, Assumed growth = 7% per year, Period = 30 years
Working: Periods = 360. Future value = 500 × ((1.005833)^360 − 1) / 0.005833 ≈ $609,985.50. Total contributed = 500 × 360 = $180,000, so assumed growth accounts for ≈ $429,985.50.
Result: Projected balance ≈ $609,985.50 from $180,000 contributed, at the assumed 7% rate

A starting balance plus contributions: $10,000 and $200 a month for 25 years at 6%

Input: Current balance = $10,000, Contribution = $200/month, Assumed growth = 6% per year, Period = 25 years
Working: Monthly rate = 0.005, periods = 300. Starting balance grows to 10,000 × (1.005)^300 ≈ $44,649.70. Contributions grow to 200 × ((1.005)^300 − 1) / 0.005 ≈ $138,598.79. Total ≈ 44,649.70 + 138,598.79 = $183,248.49. Total put in = 10,000 + (200 × 300) = $70,000.
Result: Projected balance ≈ $183,248.49 from $70,000 put in, at the assumed 6% rate

Frequently asked questions

Is this financial advice?

No. This page is a projection calculator: it compounds the balance, contributions and rate you enter and shows the resulting arithmetic. It does not recommend how much to contribute, what age to target, what rate to assume or where to hold savings, and it takes no account of tax rules, employer schemes, fees or your personal circumstances. Decisions about retirement saving belong with your own judgment or a regulated adviser.

What growth rate should I enter?

The rate is your assumption to test, and the page deliberately suggests none. A practical approach is to run the projection at a low, a middle and a high rate and look at the range of outcomes rather than any single figure — over 30–40 years the choice of rate is the largest single influence on the result, larger than modest changes to the contribution.

Why do the last years add so much more than the first years?

Compounding is a percentage of the current balance. When the balance is small, a year's growth is small in money terms; by the final years the balance is large, so the same percentage produces a large amount. In the first example's year table the balance passes the total-contributed line slowly and then pulls away — most of the projected growth arrives in the later part of the period.

Does the projection include inflation, tax or fees?

No. The projected balance is a nominal figure at the assumed rate, before inflation, taxes and any product fees, all of which reduce the real outcome. To view the result in today's purchasing power, run the projected balance through the Inflation Calculator for the same number of years at an inflation rate you choose.

What if I stop contributing part-way through?

Run the projection in two stages: first to the age at which contributions stop, using that result as the starting balance for a second projection with the contribution set to zero for the remaining years. The balance keeps compounding in the second stage — growth does not stop when contributions do — but the final figure will be materially lower, and the two-stage run shows by how much.

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