TSP Withdrawal Calculator: $31,500 Net on a $50,000 Withdrawal at 55
Use this guide to understand the assumptions, inputs, results, and next steps behind the calculator.
Created by Luis Gonzalez · Last updated May 8, 2026
A TSP withdrawal is a distribution from your retirement account. For traditional TSP money, a withdrawal is generally included in taxable income; an early-distribution penalty may also apply unless an exception is available. This calculator estimates deductions from a withdrawal using the entered federal and state tax rates, age, separation status, and Roth portion.
The default estimate starts with a $50,000 gross withdrawal at age 55, a 22% federal rate, a 5% state rate, no Roth portion, and the default “not separated” setting. The result is $18,500 in total deductions and $31,500 net received. This is a simplified estimate, not a tax return or a determination of eligibility for an exception.
Default Example: Follow the Arithmetic
With a 0% Roth portion, the entire $50,000 is treated as traditional taxable money in the model.
- Federal tax estimate: $50,000 × 22% = $11,000
- State tax estimate: $50,000 × 5% = $2,500
- Early penalty estimate: $50,000 × 10% = $5,000
- Total deductions: $11,000 + $2,500 + $5,000 = $18,500
- Net received: $50,000 − $18,500 = $31,500
The effective deduction rate is $18,500 ÷ $50,000 × 100 = 37%. The calculator applies the entered tax rates directly to the taxable amount, rather than calculating progressive tax brackets or withholding rules.
Inputs and Important Simplifications
Enter the planned withdrawal amount, current age, TSP balance, federal and state tax rates, whether you have separated from service, the Roth portion, and other income. The supplied calculation does not use the other-income field in its tax computation. It also does not check whether the withdrawal amount exceeds the entered TSP balance.
The model treats a Roth withdrawal as qualified at age 59½ or older. Before that age, it treats 30% of the Roth portion as taxable Roth earnings. Actual Roth TSP tax treatment depends on whether the distribution is qualified and on the account’s contribution and earnings composition; the calculator’s 30% assumption is a simplification.
For traditional money, the tool estimates federal and state tax by multiplying the taxable amount by the rates entered. Actual tax depends on total income, deductions, filing status, state law, and withholding. Review a 401(k) Withdrawal Calculator or IRA Withdrawal Calculator for comparisons, and use the IRS’s explanation of early distributions as a starting point for rules.
Age Thresholds and Early-Distribution Penalties
The calculator applies a 10% early penalty when the age is below its selected threshold. With the separation option off, that threshold is 59½. With separation from service selected, the model uses age 55 as the threshold. In the default example, separation is off and age 55 is below 59½, so the modeled penalty is $5,000.
Actual exceptions are more detailed than a single checkbox. For example, the “age 55 rule” generally concerns separation from service during or after the calendar year the worker reaches age 55 and distributions from an eligible employer plan. It is not a universal penalty waiver for every account or situation. Other exceptions may apply, and tax treatment can differ by distribution type. Read current IRS guidance and TSP rules before taking money out.
The penalty is separate from income tax. A withdrawal can be subject to ordinary income tax even when an early-distribution penalty does not apply. To compare alternatives to a lump sum, see the TSP loan calculator and retirement withdrawal strategy calculator.
How the Estimate Is Calculated
Traditional taxable amount = gross withdrawal − Roth portion
Taxable amount = traditional taxable amount + modeled taxable Roth earnings
Total deductions = federal tax + state tax + early penalty
Net received = gross withdrawal − total deductions
For the default case, taxable amount is $50,000 because the Roth portion is zero. Federal tax is $50,000 × 22% = $11,000; state tax is $50,000 × 5% = $2,500; and the 10% penalty is $50,000 × 10% = $5,000. Subtracting the $18,500 total deductions leaves $31,500.
Compare Withdrawal Amounts
With the defaults, the table applies 22% federal tax, 5% state tax, and a 10% penalty to each listed withdrawal. The results are calculator-style estimates using the same flat-rate method.
| Gross withdrawal | Estimated taxes | Modeled penalty | Estimated net |
|---|---|---|---|
| $25,000 | $6,750 | $2,500 | $15,750 |
| $50,000 | $13,500 | $5,000 | $31,500 |
| $100,000 | $27,000 | $10,000 | $63,000 |
| $150,000 | $40,500 | $15,000 | $94,500 |
| $200,000 | $54,000 | $20,000 | $126,000 |
The tax column combines the modeled 22% federal and 5% state estimates. In the default example’s result cards, federal and state tax are shown separately as $11,000 and $2,500.
Questions About TSP Withdrawals
Is $31,500 the amount I will receive from a $50,000 withdrawal?
It is the calculator’s estimate using the entered rates and its penalty assumption. Actual withholding and final tax liability can differ. A tax estimate is not the same as the amount withheld by TSP or the amount ultimately owed.
Does age 55 automatically eliminate the 10% penalty?
No. The calculator’s separation toggle uses age 55 as a simplified threshold, but the real exception has eligibility conditions. The IRS explains the general rule and other exceptions in its early distribution guidance. Confirm how it applies to your separation date and account.
Is every withdrawal before 59½ penalized?
No. Some exceptions may apply, and tax-qualified plan rules differ. The tool applies a simplified age test and does not evaluate every exception.
Should I take a lump sum or spread withdrawals over time?
A lump sum can create a larger taxable distribution in one year; spreading withdrawals may change annual taxable income and cash-flow flexibility. The better choice depends on your income, expenses, and withdrawal rules. Compare a tax-efficient retirement withdrawal calculator and consider how RMDs work.
How does the calculator handle Roth TSP money?
It treats Roth withdrawals as tax-free at age 59½ or older under its simplified assumption. Below that age, it assumes 30% of the Roth portion is taxable earnings. Actual qualified-distribution requirements and basis treatment can differ, so do not treat that percentage as an IRS rule.
Does the estimate include withholding or my total income?
No. It uses the entered flat federal and state rates and does not incorporate other income into the calculation despite the input field. Actual tax depends on your complete tax situation.
Next Steps Before Taking a Distribution
Check the source of the money (traditional or Roth), the reason for the distribution, your age and separation date, and whether an exception applies. Then compare the cash you need with the tax cost of withdrawing more than necessary. For related planning, use the TSP Calculator, pension withdrawal calculator, or retirement withdrawal calculator.
If you expect required minimum distributions later, review the IRS rules and this guide to required minimum distributions. A withdrawal estimate can help you ask better questions, but it cannot replace current TSP guidance or a complete tax calculation.