Retirement calculator

Estimate how much you need to retire, whether your savings are on track and how long your money could last, based on your age, savings, income goal and other retirement income.

By OpenBookMoney Editors · Free, no sign-up · Updated Oct 15, 2026

Retirement calculator

See whether your savings plan can fund the retirement income you want — and what to change if it can’t.

Ages
Include any employer match.
Social Security, pensions or rental income, in today’s money.
Assumptions (% per year)
Projected savings at age 65 $1,122,621 About $473,040 in today’s money
Shortfall of $777,733 At this pace your savings run out around age 78. Saving more, retiring later or spending less can close the gap.
Nest egg needed at 65 $1,900,354
Sustainable income (today’s money) $43,630/yr
Extra monthly saving needed $454/mo
Years of saving · in retirement 35 · 25
Savings balance by age Age 66 · $1,073,939 after withdrawing $94,928
Saving years Retirement years (after withdrawals)

Balance and withdrawals by age

Age Phase Withdrawal Balance
31 Saving — $32,940
32 Saving — $41,436
33 Saving — $50,527
34 Saving — $60,254
35 Saving — $70,662
36 Saving — $81,798
37 Saving — $93,714
38 Saving — $106,464
39 Saving — $120,107
40 Saving — $134,705
41 Saving — $150,324
42 Saving — $167,037
43 Saving — $184,920
44 Saving — $204,054
45 Saving — $224,528
46 Saving — $246,435
47 Saving — $269,876
48 Saving — $294,957
49 Saving — $321,795
50 Saving — $350,510
51 Saving — $381,236
52 Saving — $414,113
53 Saving — $449,291
54 Saving — $486,931
55 Saving — $527,207
56 Saving — $570,301
57 Saving — $616,413
58 Saving — $665,752
59 Saving — $718,544
60 Saving — $775,033
61 Saving — $835,475
62 Saving — $900,149
63 Saving — $969,349
64 Saving — $1,043,394
65 Saving — $1,122,621
66 Retired $94,928 $1,073,939
67 Retired $97,301 $1,020,587
68 Retired $99,734 $962,291
69 Retired $102,227 $898,767
70 Retired $104,783 $829,713
71 Retired $107,403 $754,814
72 Retired $110,088 $673,739
73 Retired $112,840 $586,140
74 Retired $115,661 $491,651
75 Retired $118,552 $389,888
76 Retired $121,516 $280,449
77 Retired $124,554 $162,910
78 Retired $127,668 $36,828
79 Retired $130,860 $0
80 Retired $134,131 $0
81 Retired $137,484 $0
82 Retired $140,921 $0
83 Retired $144,444 $0
84 Retired $148,056 $0
85 Retired $151,757 $0
86 Retired $155,551 $0
87 Retired $159,440 $0
88 Retired $163,426 $0
89 Retired $167,511 $0
90 Retired $171,699 $0

How it’s calculated

Savings grow monthly at your pre-retirement return with contributions added each month. In retirement, the gap between the income you want and your other income is withdrawn at the start of each year and rises with inflation; the remaining balance earns your retirement return. Nest egg needed = W × (1 − (1 + rr)^−D) ÷ rr × (1 + rr), where W is the first-year withdrawal, rr the real return in retirement and D the years in retirement.

Does not model taxes, fees, market swings or changes in spending. Estimates only — consider speaking with a financial professional.

How to use the retirement calculator

  1. Enter your current age, the age you want to retire and the age your plan should last until.
  2. Add your retirement savings today and how much you save each month.
  3. Enter the yearly income you want in retirement in today’s money.
  4. Add other retirement income, such as Social Security or a pension.
  5. Adjust the assumptions: returns before and after retirement, and inflation.

The chart and table show your savings balance and withdrawals by age, so you can see if and when the money would run out.

How the calculator works

Before retirement, your savings grow monthly at your pre-retirement return, with contributions added each month. In retirement, the gap between the income you want and your other income is withdrawn at the start of each year and rises with inflation.

Nest egg needed = W × (1 − (1 + rr)−D) ÷ rr × (1 + rr)
where W is the first-year withdrawal, rr the real (after-inflation) return in retirement and D the number of years in retirement.

Rules of thumb for retirement planning

  • Income replacement: many planners suggest aiming to replace around 70% to 80% of your pre-retirement income, though your own spending plans matter more.
  • The 4% rule: withdrawing about 4% of your savings in the first year and then adjusting for inflation has historically lasted around 30 years in many scenarios. It’s a starting point, not a guarantee.
  • Quick math: to cover a $40,000-a-year gap with the 4% rule, you’d need about $1,000,000 ($40,000 ÷ 0.04).

Our guide on how much you need to retire explains these rules in more detail.

If you’re behind, here’s what helps

  • Capture your full employer match in a 401(k); it’s free money. See our 401(k) calculator.
  • Raise your savings rate a little each year, for example with every raise.
  • Use catch-up contributions from age 50, which let you save more in 401(k) plans and IRAs.
  • Work a few years longer, which adds savings, delays withdrawals and can increase Social Security benefits.
  • Choose the right accounts: compare 401(k) and IRA options and Roth vs. traditional tax treatment.

Frequently asked questions

How much should I have saved for retirement?

It depends on when you plan to retire, how much you’ll spend and your other income. Rather than a single target, use the calculator to test your own numbers and see whether your savings last through your plan.

Should I include Social Security?

Yes, as “other retirement income”. You can see your own estimate by creating a my Social Security account on the Social Security Administration’s website.

What return should I assume?

Many people use lower returns in retirement than before it, because portfolios usually become more conservative. Test several rates to see how sensitive your plan is.

Does the calculator include taxes?

No. It doesn’t model taxes, fees, market swings or changes in spending, so leave some margin for safety.

How long will my retirement savings last?

Look at the balance by age: the plan works if the balance stays above zero until the age you entered. Our retirement income calculator focuses on how long a lump sum lasts.

Results are estimates for illustration only. Consider speaking with a qualified financial professional about your own plan.