Thrift Saving Plan Calculator
Thrift saving plan calculator works out Projected balance at retirement and Your total contributions from Plan year, Annual salary and Current vested balance. The default figures on this page give projected balance at retirement of 944,607.86; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
5 steps
- 2026 elective deferral limit = 24500 + 0 catch-up at age 35 = 24500.
- Employee contribution = min(5% x 100000, 24500) = 5000, or 192.31 per pay period.
- TSP agency contribution = 1% automatic + first 3% matched in full + next 2% matched at 50% = 5000.
- Each year the balance rolls forward as balance x (1 + 7%) plus the year's contributions, for 30 years.
- Projected balance at 65 = 944607.86, of which 150000 is yours, 150000 is the employer's and 644607.86 is investment growth.
Year-by-year projectiontable
| year | age | salary | employee | employer | growth | balance |
|---|---|---|---|---|---|---|
| 1 | 36 | 100,000 | 5,000 | 5,000 | 0 | 10,000 |
| 2 | 37 | 100,000 | 5,000 | 5,000 | 700 | 20,700 |
| 3 | 38 | 100,000 | 5,000 | 5,000 | 1,449 | 32,149 |
| 4 | 39 | 100,000 | 5,000 | 5,000 | 2,250.43 | 44,399.43 |
| 5 | 40 | 100,000 | 5,000 | 5,000 | 3,107.96 | 57,507.39 |
| 6 | 41 | 100,000 | 5,000 | 5,000 | 4,025.52 | 71,532.91 |
| 7 | 42 | 100,000 | 5,000 | 5,000 | 5,007.3 | 86,540.21 |
| 8 | 43 | 100,000 | 5,000 | 5,000 | 6,057.81 | 102,598.03 |
| 9 | 44 | 100,000 | 5,000 | 5,000 | 7,181.86 | 119,779.89 |
| 10 | 45 | 100,000 | 5,000 | 5,000 | 8,384.59 | 138,164.48 |
| 11 | 46 | 100,000 | 5,000 | 5,000 | 9,671.51 | 157,835.99 |
| 12 | 47 | 100,000 | 5,000 | 5,000 | 11,048.52 | 178,884.51 |
| 13 | 48 | 100,000 | 5,000 | 5,000 | 12,521.92 | 201,406.43 |
| 14 | 49 | 100,000 | 5,000 | 5,000 | 14,098.45 | 225,504.88 |
| 15 | 50 | 100,000 | 5,000 | 5,000 | 15,785.34 | 251,290.22 |
| 16 | 51 | 100,000 | 5,000 | 5,000 | 17,590.32 | 278,880.54 |
| 17 | 52 | 100,000 | 5,000 | 5,000 | 19,521.64 | 308,402.17 |
| 18 | 53 | 100,000 | 5,000 | 5,000 | 21,588.15 | 339,990.33 |
| 19 | 54 | 100,000 | 5,000 | 5,000 | 23,799.32 | 373,789.65 |
| 20 | 55 | 100,000 | 5,000 | 5,000 | 26,165.28 | 409,954.92 |
| 21 | 56 | 100,000 | 5,000 | 5,000 | 28,696.84 | 448,651.77 |
| 22 | 57 | 100,000 | 5,000 | 5,000 | 31,405.62 | 490,057.39 |
| 23 | 58 | 100,000 | 5,000 | 5,000 | 34,304.02 | 534,361.41 |
| 24 | 59 | 100,000 | 5,000 | 5,000 | 37,405.3 | 581,766.71 |
| 25 | 60 | 100,000 | 5,000 | 5,000 | 40,723.67 | 632,490.38 |
| 26 | 61 | 100,000 | 5,000 | 5,000 | 44,274.33 | 686,764.7 |
| 27 | 62 | 100,000 | 5,000 | 5,000 | 48,073.53 | 744,838.23 |
| 28 | 63 | 100,000 | 5,000 | 5,000 | 52,138.68 | 806,976.91 |
| 29 | 64 | 100,000 | 5,000 | 5,000 | 56,488.38 | 873,465.29 |
| 30 | 65 | 100,000 | 5,000 | 5,000 | 61,142.57 | 944,607.86 |
Figures from IRS retirement plan limits, 2026 rules, checked 31 August 2026. Its 6 worked examples are re-run on every release, last on 15 September 2026. What changed · how reference data is kept current
Sources and references
5 sources
Keep this result
Save it, change one figure, then compare the two
The calculation stays free. Save this scenario, adjust one assumption, save that too, and put them side by side to see exactly what the change costs you. A free account keeps 5 scenarios and 2 comparisons; Personal makes both unlimited and adds exports and private links. Nothing is saved unless you press Save.
What the thrift saving plan calculator calculates
Projects a 401(k), 403(b), 457(b) or TSP balance with employer matching against the statutory contribution limits, and also computes this year’s contributions, the tax and penalty on an early withdrawal, and the plan-loan limit and repayment.
How to use this thrift saving plan calculator
Enter Plan year, Annual salary, Current vested balance and Your contribution. Projected balance at retirement updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Projected balance at retirement, Your total contributions and Total employer contributions.
The method follows IRS Notice 2025-67, 2026 amounts relating to retirement plans and IRAs, SECURE 2.0 ACT of 2022, section 109 — higher catch-up limit at ages 60 to 63, IRC section 72(t) — 10% additional tax on early distributions, and IRC section 3405(c) — 20% mandatory withholding, IRC section 72(p)(2)(A) — limit on plan loans and Thrift Savings Plan — Contribution types and agency/service matching.
What you can compare
Change one input at a time to see how it affects Projected balance at retirement, Your total contributions and Total employer contributions. The inputs you can vary are Plan year, Annual salary, Current vested balance, Your contribution, Your age now and Age at retirement.
Understanding Projected balance at retirement, Your total contributions and Total employer contributions
An estimate based on the assumptions you enter. Contribution limits, the taxation of a distribution and the terms of a plan loan depend on your plan document, your filing position and your state — confirm with your plan administrator and a tax adviser before acting.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
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Frequently asked questions
How much should I have in TSP at 50?
On the figures this page opens with — your age now 45 years, amount withdrawn 25,000, your other ordinary income this year 70,000 USD and state tax rate on the withdrawal 0% — the projected balance at retirement is 944,607.86. No single number fits everyone: change any figure above and the answer updates as you type, with each step of the arithmetic beside it.
Is it worth putting money in the thrift savings plan?
Projects a 401(k), 403(b), 457(b) or TSP balance with employer matching against the statutory contribution limits, and also computes this year’s contributions, the tax and penalty on an early withdrawal. On the figures this page opens with — your age now 45 years, amount withdrawn 25,000 and your other ordinary income this year 70,000 USD — the projected balance at retirement is 944,607.86. Put your own figures in their place and the working updates beside the result.
What is the 4% rule for TSP?
It needs Plan year, Annual salary, Current vested balance, Your contribution, Your age now and Age at retirement. Nothing else is required, and the figures stay in your browser.
How much should you have in your TSP after 20 years?
The result gives Projected balance at retirement, Your total contributions, Total employer contributions, Investment growth, Balance after tax in retirement and Your contribution this year, each labelled with its unit so the figure can be read on its own.
What information do I need for the thrift saving plan calculator?
You need Plan year, Annual salary, Current vested balance, Your contribution, Your age now, Age at retirement, Assumed annual return and Assumed annual salary growth. The page opens with default figures that give projected balance at retirement of 944,607.86, so you can see the scale before entering your own.
What does this thrift saving plan calculator show?
It shows Projected balance at retirement, Your total contributions, Total employer contributions, Investment growth, Balance after tax in retirement, Your contribution this year, Employer contribution this year and Your contribution each pay period, with the working and any warnings for your entries.