TSP early withdrawal costs more than most people expect, and every rate below was verified on 10 September 2026 against the IRS. The gap between what arrives in your account and what you actually keep is where the surprise lives, and it is entirely predictable once the 2 numbers are separated.
Which ages carry a penalty at all, including the exceptions that cover a large share of federal employees, is on TSP withdrawal rules. This page assumes no exception applies and works out the bill.
What does a TSP early withdrawal cost?
Three federal charges land on the same money, and they arrive at different moments, which is part of why the total is easy to underestimate. Mandatory withholding of 20% comes off at the point of payment, ordinary income tax applies at your marginal rate whenever you file, and a further 10% additional tax applies on top because the distribution is early.
Arrives, from $50,000
Total federal tax owed
What you keep, 68% of the gross
Withholding is not the tax
This is the specific misunderstanding that costs people money in April. The IRS states that a retirement plan distribution paid to you is subject to mandatory withholding of 20%, even if you intend to roll it over later. That 20% is a deposit against a bill nobody has calculated yet.
Take $50,000 at a 22% marginal rate, where $10,000 is withheld at source and $40,000 arrives in the account. The actual federal bill is $11,000 of income tax plus $5,000 of additional tax, which comes to $16,000. Since only $10,000 was held back, a further $6,000 is due at filing, and by then the money has usually been spent.
State income tax sits on top of all of it and is not in any figure here, because it ranges from nothing to over 10% depending on where you live and no single number would be true for you.
If the balance is moving rather than being spent, a direct rollover avoids every charge above, and what a custodian charges to hold it is the real comparison.
See which custodians take a TSPThe 60 day trap
The arithmetic gets worse for anyone who takes a distribution intending to redeposit it. The IRS is direct about this: if you later roll the distribution over within 60 days, you must use other funds to make up for the amount withheld.
So redepositing the full $50,000 means finding $10,000 from somewhere else, because only $40,000 was ever received. Anything not made up is treated as a distribution, taxed, and penalised. A participant who assumed the withheld money would simply be returned has created a taxable event out of a transaction they thought was neutral.
What the money would have done
The tax is the visible cost, and the larger one is usually what the balance stops earning once it is no longer invested. Left in the C Fund at its 11.39% a year since 31 May 2003, $50,000 would compound to roughly $432,347 over 20 years. Left in the G Fund at 3.07% it would reach about $91,478.
Those are historical rates rather than forecasts and the next 20 years will not repeat them. The point stands regardless of the exact figure, which is that the choice is not between $50,000 today and $50,000 later. It is between $34,000 today and a much larger number later.
Rolling over instead
A direct rollover moves the balance to another plan or an IRA with nothing withheld, no income tax and no additional tax, at any age. The IRS treats it as not taxable, so the 10% never arises.
Once the money is in a self-directed IRA holding metal, the purity rules of section 408(m) decide what bullion qualifies, it has to sit at an approved depository rather than at home, and a custodian fee plus a storage fee commonly run several hundred dollars a year whatever the balance, with the premium over spot on the first purchase on top. Those are real costs and they are an order of magnitude smaller than the 32% an early withdrawal costs on the way out.
Moving the balance rather than spending it avoids every charge above, and what the receiving account may hold is on TSP to gold IRA.
Our read
Almost nobody takes an early withdrawal because they wanted to. They take one because something happened, and the cost of the alternatives at that moment looked worse. That is worth saying plainly, because the arithmetic above reads like a scolding otherwise.
What the arithmetic does establish is that the amount arriving in your account is roughly 18% more than what you keep, so anyone budgeting against the deposit is short. If the need is genuinely short term, a TSP loan is cheaper than this by a wide margin and is covered in TSP loan rules.