401(k) Contribution Calculator
Calculate annual 401(k) contribution from salary and contribution percentage.
401(k) Contribution measurements
Enter your values, then calculate.
Result
How to calculate 401(k) contribution
This calculator answers a simple but easy-to-get-wrong question: how much will actually go into your 401(k) this year based on your salary and your chosen contribution percentage? It's the number your paycheck deductions are based on, before any employer match is added.
How the calculation works
Annual contribution = Annual salary × (Contribution percent ÷ 100). This is a straightforward percentage-of-salary calculation — the same math your payroll system uses to determine how much comes out of each paycheck.
Example
On a $75,000 salary contributing 8%: the annual contribution is $6,000, or about $250 per paycheck if paid twice a month. Raising the contribution to 10% increases the annual amount to $7,500 — an extra $1,500/year, or about $31/paycheck, for that 2 percentage-point increase.
Frequently asked questions
Does this include my employer's matching contribution?
No, this calculates only your own contribution based on salary and percentage. Add your employer's match separately using your plan's specific match formula.
Is there a limit to how much I can contribute?
Yes — the IRS sets an annual employee contribution limit that changes periodically and is higher for those 50 and older via catch-up contributions. Check the current-year limit with your plan administrator if you're contributing a high percentage of a high salary.
Should I contribute pre-tax (traditional) or after-tax (Roth)?
This depends on your current tax bracket versus your expected bracket in retirement, which varies by individual situation — many financial guides can help you think through this, but it's worth discussing with a tax professional for your specific circumstances.
401(k) Contribution Calculator
Annual contribution = Annual salary × (Contribution percent ÷ 100). This is a straightforward percentage-of-salary calculation — the same math your payroll system uses to determine how much comes out of each paycheck.
Let's understand your 401(k) contribution result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for 401(k) Contribution
- Check your plan's IRS contribution limit for the year — this calculator shows what your percentage produces, but very high earners or high percentages can exceed the annual legal maximum.
- If your employer offers a match (e.g., 50% up to 6% of salary), calculate that separately and add it to this result for your true total annual contribution.
- Increasing your contribution percentage by even 1–2% during a raise, before you get used to the extra take-home pay, is one of the easier ways to raise long-term savings without feeling a budget pinch.
Common 401(k) Contribution Mistakes to Avoid
- Confusing your contribution percentage with your employer's match percentage — they're separate, and this calculator only computes your own contribution.
- Not checking whether your plan calculates the percentage on gross salary or on a reduced figure (like salary after pre-tax health premiums) — check your plan documents if your paycheck deduction doesn't match this estimate exactly.
When to Use This Calculator
This calculator answers a simple but easy-to-get-wrong question: how much will actually go into your 401(k) this year based on your salary and your chosen contribution percentage? It's the number your paycheck deductions are based on, before any employer match is added.