Transparent method
The formula
Worked example
Example inputs
How to interpret the result
An early withdrawal's visible cost, tax plus penalty on the amount withdrawn, is only part of the real price, because the money removed also stops compounding for every year it would have otherwise remained invested, and that forgone future growth is frequently the larger piece of the total cost by the time retirement actually arrives.
Before you rely on it
What to check
Compare the immediate tax-and-penalty cost against the separately calculated forgone future growth, since the second figure is often the larger of the two over a long enough remaining horizon.
The common error
Where people go wrong with early 401(k) withdrawal cost calculator
Evaluating an early withdrawal by its immediate tax and penalty cost alone. The forgone future growth on that removed money, compounding for years or decades, is frequently the larger real cost once the full horizon is considered.
Sensitivity evidence
How early withdrawal changes the cash received after tax and penalty
| Early withdrawal | Cash received after tax and penalty | Potential future value forgone |
|---|---|---|
| $24,000 | $15,840 | $76,971 |
| $27,000 | $17,820 | $86,593 |
| $30,000worked example | $19,800 | $96,214 |
| $33,000 | $21,780 | $105,835 |
| $36,000 | $23,760 | $115,457 |
Every input, tested
Which input moves the cash received after tax and penalty most
| Input | Tested from | To | Cash received after tax and penalty at each end | Swing |
|---|---|---|---|---|
| Early withdrawal | $27,000 | $33,000 | $17,820 to $21,780 | $3,960 (20%) |
| Penalty rate | 8.0% | 12.0% | $20,400 to $19,200 | $1,200 (6.1%) |
| Estimated income-tax rate | 22.0% | 26.0% | $20,400 to $19,200 | $1,200 (6.1%) |
| Annual return forgone | 5.0% | 7.0% | $19,800 to $19,800 | none |
| Years until retirement | 15.0 years | 25.0 years | $19,800 to $19,800 | none |
Two variables at once
Cash received after tax and penalty by early withdrawal and penalty rate
| Early withdrawal \ Penalty rate | 6.0% | 10.0% | 14.0% |
|---|---|---|---|
| $24,000 | $16,800 | $15,840 | $14,880 |
| $27,000 | $18,900 | $17,820 | $16,740 |
| $30,000 | $21,000 | $19,800 | $18,600 |
| $33,000 | $23,100 | $21,780 | $20,460 |
| $36,000 | $25,200 | $23,760 | $22,320 |
Step by step
The worked example, input by input
| Input | Value used |
|---|---|
| Early withdrawal | $30,000 |
| Penalty rate | 10.0% |
| Estimated income-tax rate | 24.0% |
| Annual return forgone | 6.0% |
| Years until retirement | 20.0 years |
| Cash received after tax and penalty | $19,800 |
| Potential future value forgone | $96,214 |
Where the inputs come from
Early withdrawal is the gross amount you would take from the plan. The penalty rate is normally 10% for withdrawals before 59½, and the income-tax rate is your marginal rate on the withdrawal. Annual return forgone and years until retirement measure the growth you give up. Some cases avoid the 10% penalty, such as separation from service in or after the year you turn 55, disability and certain medical costs, so check exceptions before assuming it applies.
Using the cash received after tax and penalty in a real decision
Compare that with alternatives such as a 401(k) loan, a home equity loan or a hardship exception, since taking the money out is usually the most expensive way to borrow.
When the result stops applying
The estimate assumes the withdrawal is taxable and adds to your other income, which may push you into a higher bracket. Employers withhold 20% for federal tax on eligible rollovers but the real tax can be more or less. Roth 401(k) contributions can be treated differently from earnings. A 401(k) loan must be repaid, and if you leave your job the balance can become due.
What to compare it with
Check whether you can avoid the penalty with the Rule of 55 or the 72(t) SEPP calculator, and use the retirement savings calculator to see how much the lost balance changes your outcome. The 401(k) match page shows the match you could keep by not withdrawing.
People also ask
Frequently asked questions
Is there a way to avoid the 10% penalty?
Yes, in some cases: separation from service at 55 or later, disability, certain medical expenses, a qualified domestic relations order, and substantially equal periodic payments under section 72(t).
Is a 401(k) loan better than a withdrawal?
Often, because a loan is not taxed or penalized if repaid on schedule. The risks are repayment when you leave your job and losing market growth on the borrowed amount.
How much tax is withheld on a 401(k) withdrawal?
Plans withhold 20% for federal income tax on eligible distributions paid to you, but your actual tax and the 10% penalty may be higher, so set money aside.