457(b) Calculator: Project a Government and Nonprofit Retirement Balance
Project how a 457(b) plan could grow — the deferred compensation plan available to state and local government employees and some nonprofit workers.
Adjust the inputs and select Calculate for a full breakdown.
Year-by-year growth schedule
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Future value | Total contributions | Total interest earned |
|---|---|---|---|
| $30k · $700/mo · 7% · 25yr | $738,812.73 | $240,000.00 | $498,812.73 |
| $0 · $500/mo · 8% · 30yr | $745,179.72 | $180,000.00 | $565,179.72 |
| $120k · $1.2k/mo · 6% · 15yr | $643,473.68 | $336,000.00 | $307,473.68 |
| $10k · $300/mo · 7% · 35yr | $655,377.90 | $136,000.00 | $519,377.90 |
How This Calculator Works
Enter the current 457(b) balance, the expected annual return, the years until retirement, and the monthly contribution. The calculator compounds monthly and shows the projected balance plus the share built by investment growth.
The Formula
Future Value with Regular Contributions
P = starting amount, PMT = monthly contribution, r = monthly rate (annual ÷ 12), n = number of months
Worked Example
With $30,000 saved, $700 added monthly, and a 7% return over 25 years, a 457(b) reaches about $738,800. Contributions account for $240,000; investment growth supplies the remaining $498,800.
Key Insight
The 457(b)'s underrated advantage is the lack of a 10% early-withdrawal penalty after separation from service — at any age. Government employees who retire early (police, fire, teachers retiring at 50 or 55) can draw on a 457(b) without the penalty that hits 401(k) and IRA withdrawals before 59½. The same dollar locked in a 401(k) is much less flexible at early-retirement age.
457(b) early withdrawal advantage
Unique 457(b) feature: no 10% early withdrawal penalty after separation from service, regardless of age. This differs from 401(k) and 403(b) which apply 10% penalty for withdrawals before age 59½ (with limited exceptions).
Practical use: 457(b) is particularly valuable for early retirees from public sector. Government employee retiring at 55 can access 457(b) balance immediately without penalty (income tax still applies). Same person's 401(k) would need to wait until 59½ or use SEPP/Rule of 55.
Strategy for early retirees: allocate aggressively to 457(b) during working years to maximize this account for early-retirement income. Use 401(k)/403(b) for post-59½ income. This 'account location' optimization can provide critical income flexibility for early retirees from public service careers.
Combining 457(b) with other accounts
457(b) contribution limit ($23K in 2024) is SEPARATE from 401(k) and 403(b) limits. Public school teacher with 403(b) AND 457(b) available can contribute $23K to each = $46K total. Government worker with TSP AND 457(b) can do similar combined approach.
Plus IRA limits ($7K + $1K catch-up). For maximally-contributing 50-year-old public school teacher: $30.5K to 403(b) + $30.5K to 457(b) + $8K to IRA = $69K in tax-advantaged retirement saving annually. Over 15 years to retirement at 7% return: ~$1.7M accumulated. Powerful for high-earning public employees.
Special catch-up: 457(b) 'last-3-years' provision allows employee to contribute up to 2× normal limit ($46K in 2024) in any of the 3 years immediately before normal retirement age. Useful for late-career workers behind on retirement saving. Must coordinate with plan administrator and calculate available unused contribution from prior years.
457(b) vs 401(k)/403(b) key differences
Reference key differences between 457(b) plans and other employer retirement plans.
| Feature | 457(b) | 401(k) / 403(b) |
|---|---|---|
| 2024 contribution limit | $23,000 | $23,000 |
| Catch-up 50+ | $7,500 | $7,500 |
| Last-3-years catch-up | Up to 2× limit ($46K) | Not available |
| Early withdrawal penalty (post-separation) | None | 10% if under 59½ |
| RMDs required | Age 73 (SECURE 2.0) | Age 73 (SECURE 2.0) |
| Employer match | Sometimes (less common) | Often |
| Eligible employers | State/local govt, nonprofits | Corporate, nonprofit, govt |
| Combined with other plans | Separate from 401(k)/403(b) | Combined limit |
The 'separate limit' feature is most valuable for public employees with access to both 457(b) and 403(b) — effectively doubles retirement contribution capacity. The 'no early withdrawal penalty' feature is valuable for early retirees. Both features make 457(b) highly attractive for public-sector careers.
Frequently Asked Questions
What is a 457(b)?
A deferred compensation plan for state and local government employees and certain nonprofit workers. It works similarly to a 401(k) — pre-tax contributions, tax-deferred growth, taxed on withdrawal — with some distinctive features that favor early retirees.
How is a 457(b) different from a 401(k)?
The biggest difference: no 10% early-withdrawal penalty after separation from service, at any age. The 457(b) was designed around government workers who often retire in their 50s after long service.
Can I contribute to both a 457(b) and a 403(b)?
Yes — and the limits stack. Public school teachers and some healthcare workers eligible for both can effectively double their tax-deferred savings limit by maxing out each plan separately.
What is a Roth 457(b)?
Some 457(b) plans offer a Roth bucket — contributions are taxed now, growth and qualified withdrawals are tax-free. Useful for younger employees who expect higher tax brackets later.
Are catch-up contributions allowed?
Yes — standard age-50 catch-up applies. The 457(b) also offers a special 'last three years before retirement' catch-up that can double the limit, useful for employees who under-saved earlier in their career.
When is this calculator unreliable?
When not aware of 457(b) specific advantages (separate contribution limit allowing combination with 403(b); no early withdrawal penalty after separation regardless of age). For public employees, maximizing both 457(b) and 403(b) plus IRA can produce dramatic accumulation acceleration vs corporate workers limited to 401(k) + IRA. Also unreliable for non-governmental 457(b) plans which have different rules — they're subject to creditor claims (top-hat structure) and can have restrictive distribution provisions.
References & Authoritative Sources
- Internal Revenue Service (IRS) — 457(b) Plans — Eligible Deferred Compensation · consulted June 1, 2026 · Federal regulator on 457(b) plans
- National Association of Government Defined Contribution Administrators (NAGDCA) — 457(b) Plan Resources · consulted June 1, 2026 · Industry association for government 457(b) plans
- U.S. Office of Personnel Management (OPM) — Federal Employee Retirement Information · consulted June 1, 2026 · Federal employee benefits including TSP
Related Calculators
Data Sources & Benchmarks
This calculator draws on 2 independent, dated sources. The starting values for expected annual return are taken from the benchmarks below and refresh whenever the snapshots are updated.
Methodology & Review
457(b) growth uses compound interest with regular contributions. The calculator returns balance projection. 457(b) plans are retirement accounts for U.S. state and local government employees and certain nonprofit workers (often available alongside 403(b)). 2024 contribution limit: $23,000 plus $7,500 catch-up if 50+. Key advantage over 401(k)/403(b): no 10% early withdrawal penalty after separation from service (regardless of age). Special 'last-3-years' catch-up allows additional contributions in 3 years before normal retirement age. RELIABILITY: Reliable for documented inputs. Less reliable as forward projection because (a) like 403(b), some 457(b) plans have higher fees than ideal; (b) early-withdrawal penalty advantage assumes separation from service — taking distributions while still employed is typically restricted; (c) investment options vary substantially by plan sponsor.
Updated