401(k) estimate
Prepared by Benjamin Harrigan · (585) 748-4409
401(k) estimate

Your 401(k) estimate

See how owner deferral, owner match, and profit share can cut taxes and build wealth — then tap Show me for an illustrative weekly + monthly estimate.

Illustrative weekly + monthly estimate · based on what you enter · not a guarantee or tax advice

Your numbers

One short path: business → tax rate → contributions → results.

About the business
Don’t count the owner here. For S/C corp, use Owner on payroll if the owner is on W-2s. 0 is OK for owner-only.
Sole props / partners generally aren’t W-2 employees of their own business — leave this off and count staff in “other people” only.
One owner — business profit is taxed on your personal return.
Your tax rate
Used with filing jointly + state for the live combined tax rate below (and weekly tax savings after Show me).
Check if you file a joint return with your spouse.
2026 catch-up: $8k (50+) · $11,250 ages 60–63
City/county local income tax if any — defaults to 0. Added to personal tax rate everywhere.
Off = 1 owner room for what you put in from your pay. On ≈ 2× (same income assumption).
Est. combined tax rate — enter income + state
Three ways to contribute

Owner deferral (from your pay) · Owner match (you matching your own contribution) · Profit share. All three feed the estimate before you tap Show me.

1 · Owner deferral
At your max: $24,500 a year (2026 limit).
Enter income to see annual dollars.
2 · Owner match
Same match applies to everyone in the plan.
3 · Profit share
0%
enter income to see $
Profit share 0–25% of income. Your total is kept within IRS limits ($72,000 for 2026, catch-up on top).
Assumed growth & tax override
%
Used for the growth illustration (10, 20 and 30 years). Default 10%. Hypothetical only — not a prediction or guarantee.
Long-term S&P 500 average annual returns are often cited near ~10% over multi-decade periods — see Fidelity’s S&P 500 average return overview. Illustration only; past performance is not a guarantee of future results.
Tax rate override
Optional. Leave off to use the live combined rate from income + filing jointly + state (+ local). When on, override replaces federal+state only; local % still adds.
Fees and estimated credits adjust automatically with your payroll count.

Retirement plan tax credits (estimated): Estimated tax credits if claimed on a tax return (Form 8881). Not a discount on the Paychex bill. Figured from your non-family staff; you and family members don’t count toward them. With staff and a match or profit share, the employer contribution credit is up to $1,000 per staff member (or what they actually get, if less). With no staff, it’s the $1,500 auto-enroll credit only. Assumes no plan now (or in the past), every staff member full-time and contributing, auto-enroll on, and staff pay under $110,000. You and family members don’t count toward the credits, with or without Owner on payroll. The per-W-2 fee counts you when Owner on payroll is on. Estimates if claimed on a tax return, not a discount on the Paychex bill.