The seed deposit and contribution caps are the easy part. The part that catches people off guard is what happens on the way out -- the account is taxed like a traditional IRA, not like the 529 plan most savers are picturing. Three worked examples below, all pinned to this calculator's own arithmetic.
A US citizen born 2026 (seed-eligible), family contributes $5,000/year for 18 years, 6% annual return, 12% marginal tax rate, withdrawn at 18 for something other than education, a first home, disability, or similar.
| Line | Amount |
|---|---|
| Balance at withdrawal | $166,654.30 |
| Basis (family contributions only) | $90,000.00 |
| Tax-free share of the balance | 54.0% |
| Tax-free amount | $90,000.00 |
| Taxable amount (seed + growth) | $76,654.30 |
| Income tax on the taxable amount (12%) | $9,198.52 |
| 10% early-withdrawal penalty | $7,665.43 |
| Net after tax and penalty | $149,790.35 |
Turning 18 unlocks the ability to withdraw at all -- it does not by itself avoid the 10% penalty. That still applies to the taxable portion of any withdrawal before age 59 1/2, unless the withdrawal is for a recognized use.
Identical numbers to example 1 -- same balance, same basis, same 54.0% tax-free split -- except this withdrawal is for a use the traditional-IRA penalty exceptions already recognize (qualified higher education, a first home purchase, certain disability, and similar).
| Line | Amount |
|---|---|
| Tax-free amount | $90,000.00 |
| Taxable amount | $76,654.30 |
| Income tax on the taxable amount (12%) | $9,198.52 |
| 10% early-withdrawal penalty | $0.00 (waived) |
| Net after tax and penalty | $157,455.78 |
A recognized use waives the $7,665.43 penalty -- $7,665.43 more than example 1 -- but does not waive the $9,198.52 income tax on the taxable portion. Only a 529 plan waives tax on withdrawal for a qualified use; a Trump Account never does.
Same total contribution room used, same 18 years, same 6% return, same $166,654.30 balance -- but $2,500/year of the $5,000/year comes from an employer (under the shared cap) instead of all $5,000/year coming from the family.
| Line | All-family | Half-employer |
|---|---|---|
| Balance | $166,654.30 | $166,654.30 |
| Basis (family only) | $90,000.00 | $45,000.00 |
| Non-basis (seed + employer) | $1,000.00 | $46,000.00 |
| Tax-free share of every withdrawal | 54.0% | 27.0% |
Same balance, same total dollars contributed -- but the tax-free fraction is cut in half, because an employer's contribution creates no basis at all. It is taxed exactly like the seed deposit and the investment growth: fully taxable on withdrawal, unlike the identical dollar amount coming from a family member.
The Trump Account calculator applies this same pro-rata arithmetic to any current age, contribution mix, return rate, tax rate, and withdrawal age you enter, and shows the tax-free/taxable split, the penalty, and the net after-tax amount. Nothing you type leaves your browser.
54.0% of ANY withdrawal -- $90,000 is basis (the family's own contributions) out of a $166,654 total balance, and the IRA pro-rata rule applies that same 54.0%/45.0% split to every dollar withdrawn, not just the first dollars out.
No -- turning 18 only unlocks the ability to withdraw at all. The 10% penalty still applies to the taxable portion of a withdrawal before age 59 1/2 unless the withdrawal is for a recognized use (qualified education, a first home, certain disability, and similar). On the $166,654 example, withdrawing at 18 for an unrecognized use costs $9,198.52 in income tax plus a $7,665.43 penalty -- withdrawing the same balance for a recognized use waives the $7,665.43 penalty and leaves the $9,198.52 income tax due either way.
Yes, a lot. Swap $2,500/year of a $5,000/year family contribution for a $2,500/year employer contribution instead -- same total money in, same $166,654 balance -- and the tax-free fraction falls from 54.0% to 27.0%, because employer contributions create no basis at all. Every dollar an employer puts in is treated like investment growth: fully taxable on withdrawal, unlike the identical dollar amount coming from a family member.