Use this 403(b) Calculator to estimate future account value from current balance, contribution, match, and return. Formula: FV=B(1+r/12)^(12y)+M[((1+r/12)^(12y)-1)/(r/12)]. Includes 2026 limit checks.
What This 403(b) Calculator Estimates
This 403(b) Calculator estimates future retirement account value from six inputs: current age, retirement age, current 403(b) balance, monthly employee contribution, employer monthly match, and expected annual return. It separates the final projection into total value, your principal, employer match, investment growth, and estimated purchasing power.
The projected account balance at retirement age, combining compounded growth on your starting balance and recurring monthly deposits.
The total of your own dollars invested: current balance plus every monthly employee contribution over the full accumulation period.
The cumulative value of all employer monthly match deposits over the projection timeline, shown before investment growth is separated.
The estimated compound growth earned beyond total principal. It equals total projected value minus employee and employer principal.
The projected future balance converted into today’s dollars using a fixed 3.0% annual inflation assumption. This is not a tax estimate.
How the 403(b) Growth Formula Works
The calculator uses the standard future value of a lump sum plus an ordinary annuity. Your current 403(b) balance grows as a lump sum, while your monthly employee contribution and employer match are treated as recurring end-of-month deposits.
If expected return is zero, the calculation becomes simple addition: starting balance plus all monthly deposits. If expected return is above zero, the tool applies monthly compounding.
Inputs Used in the 403(b) Projection
Each input connects directly to the projection formula. Current age and retirement age create the time horizon. Current balance is the starting lump sum. Monthly employee contribution and employer match form the recurring monthly deposit. Expected annual return controls the compounding rate.
Understanding the Calculator Results
Estimated Total 403(b) Value is the headline result. It is the nominal projected account balance at retirement before taxes and before any future withdrawals.
Your Principal equals your starting balance plus all employee monthly contributions over the full time horizon. It does not include employer match or investment growth.
Employer Match is the total employer contribution amount across the accumulation period. The compounded benefit of those employer dollars is included in the total value.
Investment Growth equals projected total value minus total principal. It shows how much of the projected balance comes from compounding.
Estimated Purchasing Power discounts the future balance by a fixed 3.0% annual inflation assumption using:
2026 403(b) Contribution Limits Used
The calculator checks the annualized employee contribution against the 2026 403(b) elective deferral limit and age-based catch-up tiers. It also checks the annual additions limit for regular employee deferrals plus employer contributions.
| Age Range | Base Deferral | Catch-Up | Total Employee Limit | Type |
|---|---|---|---|---|
| Under 50 | $24,500 | — | $24,500 | Standard |
| 50–59 | $24,500 | $8,000 | $32,500 | Catch-Up |
| 60–63 | $24,500 | $11,250 | $35,750 | Enhanced Catch-Up |
| 64 and older | $24,500 | $8,000 | $32,500 | Catch-Up |
Annual Additions Limit
The calculator also applies a $72,000 annual additions test to regular employee deferrals plus employer contributions. Age-based catch-up contributions are excluded from that annual additions test in this tool.
Worked Example
The default example uses a current age of 35, retirement age of 65, current 403(b) balance of $50,000, monthly employee contribution of $500, employer monthly match of $250, and expected annual return of 7%.
Inputs
- Current Age35
- Retirement Age65
- Years to Retirement30
- Current Balance$50,000
- Monthly Employee$500
- Employer Match$250
- Total Monthly$750
- Annual Return7.0%
Results
- Your Principal$230,000
- Employer Match$90,000
- Total Principal$320,000
- Investment Growth$1,000,803
- Purchasing Power$544,153
How the Example Resolves
With \(r = 0.07\) and \(y = 30\), the monthly rate is \(\frac{0.07}{12}\). The current $50,000 balance compounds for 360 months, and the combined $750 monthly deposit is added through the annuity portion of the formula.
The total projected value is $1,320,803. Total principal is $320,000, made up of $230,000 from your starting balance plus employee contributions and $90,000 from employer match. Investment growth is therefore $1,000,803.
Using the fixed 3.0% inflation assumption, the future balance has an estimated purchasing power of about $544,153 in today’s dollars.
What This Calculator Does Not Include
This 403(b) Calculator is built for straightforward accumulation projections. It does not model every IRS rule, tax issue, plan feature, or investment behavior that may apply to a real account.
- 15-Year Service Catch-Up The special 403(b) catch-up for employees with 15+ years of service is not calculated.
- Compensation-Based Limits The tool does not accept salary data, so it cannot test the 100% of includible compensation ceiling.
- Roth Catch-Up Rules Roth catch-up requirements for certain high earners are not applied.
- Shared Plan Limits The tool does not aggregate deferrals across other 401(k), SIMPLE IRA, SARSEP, or other shared-limit plans.
- Tax on Withdrawals Pre-tax withdrawal taxation is not calculated. Results are pre-tax projections.
- Vesting Schedules Employer match is treated as fully vested and deposited monthly.
- Variable Returns The same return rate is applied every year. Market volatility is not simulated.
- Required Minimum Distributions RMD rules after retirement are outside this accumulation-phase tool.
References and Calculation Notes
The calculator uses IRS 403(b) contribution limit rules for the 2026 plan year and standard future value mathematics. Contribution limits and catch-up rules can change by year, so the page should be updated when IRS cost-of-living adjustments change.
- IRS 403(b) Contribution Limits Used for the 2026 elective deferral limit, annual additions limit, age 50+ catch-up, age 60–63 higher catch-up, and limitation notes.
- IRS Retirement Plan Cost-of-Living Adjustments Used to confirm 2026 retirement plan dollar limits for elective deferrals, defined contribution limits, and catch-up amounts.
- Standard Future Value Formula The projection combines future value of a present lump sum with future value of an ordinary annuity using monthly compounding.
- Inflation Adjustment Formula Purchasing power is estimated by discounting future value with a fixed 3.0% annual inflation assumption.
