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Retirement & 401(k) Calculator

Project your nest egg at retirement — including your employer match — and get an instant verdict on whether you are on track, not just a final number.

What this retirement calculator does

This retirement and 401(k) calculator answers the question that matters most: will I have enough? Instead of just spitting out a single balance, it projects your nest egg at retirement, factors in your employer match, estimates the yearly income that pot can safely produce, and gives you an instant verdict on whether you are on track. Type any number and the result updates immediately — no "calculate" button needed.

Most retirement tools hide the most important figure of all: the employer match. A 50% match on the first 6% of pay is effectively a 50% instant return on those dollars — free money that dramatically changes the outcome. This calculator models it explicitly so you can see exactly what leaving the match on the table costs you over a career.

How to use it

  1. Current age and retirement age — the gap between them is your investing horizon, the single most powerful input.
  2. Current balance — whatever you have saved in 401(k)s, IRAs or similar accounts today.
  3. Annual salary — used to translate your contribution percentage into dollars and to judge your income replacement rate.
  4. Your contribution % — how much of each paycheck you put in (pre-tax for a traditional 401(k)).
  5. Expected return — a long-term diversified portfolio has historically averaged around 7% after inflation; use less to be conservative.
  6. Employer match — the percentage your employer adds (e.g. 50%) and the salary cap it applies up to (e.g. 6%).

The verdict card then tells you whether your projected income clears the 70–80% salary-replacement target planners commonly use.

The formula explained

Each year your account grows by your return and then receives new money:
balance = balance × (1 + r) + (your contribution + employer match), applied once for every year until retirement.
Employer match = salary × min(your rate, match cap) × match percentage.
Safe retirement income ≈ final balance × 4% (the "4% rule").

The 4% rule, from the well-known Trinity Study, suggests that withdrawing 4% of your balance in the first year of retirement and adjusting for inflation thereafter has historically lasted 30 years in most market scenarios. It is a rough planning guide, not a guarantee, but it turns an abstract pile of money into a meaningful annual income figure.

Worked examples

Example 1 — Starting young. A 25-year-old earning $60,000 saves 10% with a 50%-up-to-6% match and a 7% return. By 65 the balance reaches roughly $1.4 million, producing about $56,000 a year — close to their final salary.
Example 2 — Catching up. A 45-year-old earning $90,000 with $120,000 saved contributes 12% with the same match at 7%. By 67 they reach about $830,000, or roughly $33,000 a year. Higher contributions partly offset the shorter horizon.
Example 3 — The cost of skipping the match. Two people save 6% of $80,000 for 30 years at 7%. With a 50% match one ends near $870,000; without it, near $725,000. The match alone added about $145,000 — for nothing extra out of pocket.

Roughly how much $500/month grows by 65 at 7%

Start ageYears investedBalance at 65Income at 4%
2540$1,197,000$47,900
3035$830,000$33,200
3530$567,000$22,700
4025$379,000$15,200
5015$155,000$6,200

$6,000/year ($500/month) of contributions, 7% annual return, no starting balance. Illustrative only.

When to use it

Tips and common mistakes

Always grab the full match first. It is the highest-return move in personal finance — never leave matched dollars unclaimed. Raise contributions with every pay rise so saving more never feels like a pay cut. Be realistic about returns: 7% is a long-term average, not a smooth yearly path, and markets fall as well as rise. Remember taxes: a traditional 401(k) is taxed on withdrawal, so your spendable income is a little lower than the headline figure; a Roth is taxed now and tax-free later. Mind inflation: using a real (inflation-adjusted) return keeps the final number in today's purchasing power. And this is a projection, not a promise — revisit it yearly and adjust.

Frequently asked questions

How much do I need to retire?

A common rule of thumb is enough to replace 70–80% of your pre-retirement salary each year. Using the 4% rule, that means a balance of roughly 18–20 times the annual income you want. This calculator works it out for you and shows whether your projection clears that bar.

What is the 4% rule?

It suggests you can withdraw about 4% of your retirement balance in your first year, then adjust that amount for inflation each year, with a high chance the money lasts about 30 years. It is a planning guide, not a guarantee, and many people adjust it up or down based on their situation.

Should I always contribute enough to get the full employer match?

Almost always yes. An employer match is an immediate, risk-free return on your money — often 50% or 100% on the first few percent of salary. Skipping it is leaving guaranteed money behind, which is why this tool models it separately.

What return rate should I assume?

A diversified stock-heavy portfolio has historically averaged around 7% per year after inflation, but returns are volatile and the past does not guarantee the future. Use 5–6% for a conservative plan and 7–8% for an optimistic one, and revisit as you near retirement.

Does this calculator account for taxes and inflation?

It shows nominal, pre-tax growth. Traditional 401(k) withdrawals are taxed as income, so spendable money is a bit lower; Roth accounts are tax-free in retirement. To see results in today's money, enter a real (inflation-adjusted) return such as 4% instead of 7%.

Is a 401(k) better than an IRA?

They are complementary. A 401(k) offers higher contribution limits and the crucial employer match, so fund it at least up to the match first. An IRA often has wider investment choices and can be used alongside it. Many people use both.

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