Calling the backdoor Roth IRA a “trick” undersells how straightforward the tax mechanics actually are. The savings come from getting money into a Roth IRA – where qualified withdrawals in retirement are entirely tax-free – when your income would otherwise block you from contributing to one directly. For 2026, direct Roth contributions phase out between $153,000 and $168,000 for single filers, and between $242,000 and $252,000 for married couples filing jointly (IRS Notice 2025-67).

The two allowed moves: contribute to a Traditional IRA (no income limit, up to $7,500 for 2026 or $8,600 if 50+), then convert it to a Roth IRA (no income limit since 2010). If you contribute nondeductibly and convert quickly, you generally owe little to no tax on the conversion itself, since you’re converting money the IRS already taxed once.

Where the “savings” can disappear: if you have other pre-tax Traditional, SEP, or SIMPLE IRA balances, the pro-rata rule (IRC Section 408(d)(2)) makes part of every conversion taxable, proportional to how much of your total IRA money is still pre-tax. And filing IRS Form 8606 correctly each year is what keeps the IRS from taxing your after-tax contributions a second time when you eventually withdraw them.

FAQ

How much can this actually save someone? The value comes from decades of tax-free growth and tax-free qualified withdrawals in retirement, not an immediate deduction – it’s a long-term strategy, not a quick refund.