What is the difference between a 403(b) and a 401(k)?
The broad retirement math is similar, but the plan types serve different employer groups and can have different administrative features. A 401(k) is the more common private-sector workplace plan. A 403(b) is usually offered by public schools, certain hospitals, tax-exempt organizations, and some church-related employers. Investment menus, employer-match design, plan fees, and catch-up details can differ even when the core salary-deferral concept looks similar.
Does this 403(b) calculator include catch-up contributions?
Yes, it includes the standard age-based 2026 IRS elective-deferral limits, including the age-50 catch-up and the higher SECURE 2.0 catch-up for ages 60 to 63. It does not include the separate 15-year-service catch-up that some long-service 403(b) participants may qualify for, so those cases should be reviewed against Publication 571 and the actual plan administrator's rules.
Are 403(b) contributions always pre-tax?
Not always. Many plans offer traditional pre-tax salary deferrals, and some also offer a Roth 403(b) option. This calculator focuses on gross contribution flow and projected account growth, not on the tax character of each contribution or the tax treatment of future withdrawals. If your planning decision depends on pre-tax versus Roth treatment, you should compare this projection with your expected tax position in retirement.
Why might my real 403(b) balance differ from the projection?
Real balances move with market volatility, payroll timing, vesting rules, fees, annuity charges, changing salaries, contribution pauses, and plan-specific limits. A calculator uses stable assumptions so you can compare scenarios consistently, but that same simplification means the result is illustrative rather than predictive. The further your real plan deviates from steady contributions and steady returns, the less closely the live account will track the projected path.
How much should I contribute to my 403(b)?
A common first step is to contribute enough to capture the full employer match, because leaving match money on the table usually means declining part of your compensation. After that, the right contribution rate depends on your budget, age, retirement target, existing savings, and whether you are also saving elsewhere.
Does employer match count toward the 403(b) employee limit?
No. Employer match does not count toward your employee elective-deferral limit. It does, however, count toward the broader annual contribution rules that apply to the plan as a whole.
What if I have a 15-year-service catch-up option?
Some 403(b) participants may qualify for a separate 15-year-service catch-up rule. This calculator does not model that extra contribution room, so you should verify eligibility and limits with Publication 571 and your plan administrator before relying on the result.
Why does the calculator show a first-year contribution snapshot?
The snapshot separates your own salary deferral, the employer match, and the applicable IRS limit so you can see which input is doing the work. That makes it easier to judge whether you are capturing the full match and whether the current deferral rate is high enough for your retirement plan.
How do I know if I am missing part of my 403(b) employer match?
Compare your current contribution rate with the salary percentage your employer will match. If the plan matches only up to 6% of pay and you contribute 4%, part of the match is still being left on the table. The calculator now surfaces that gap by showing the full-match target and the extra annual deferral needed to unlock the remaining employer contribution.
Does this calculator include vesting or plan fees?
It does not model vesting schedules, and it treats the employer contribution as if it stays in the account. It also does not subtract plan fees. Those factors can change the real-world outcome, so they should be checked separately if they matter to your decision.
Can I use this if I also have an IRA or 401(k)?
Yes. A 403(b) can sit alongside an IRA or another workplace retirement plan. The calculator only projects the 403(b) path, so it is most useful when you want to see what this one account could do before adding the rest of your retirement savings picture.