The traditional IRA gives you a tax deduction now and taxes you later. The Roth IRA taxes you now and gives you tax-free money later. The right choice depends on a single core question: will your tax rate be higher now or in retirement? But SECURE 2.0 changes several rules that shift the maths in important ways for 2026.
2026 IRA contribution limits
| Account | Under 50 | Age 50+ | Income limit (Roth) |
|---|---|---|---|
| Traditional IRA | $7,500 | $8,600 | None (deductibility phases out) |
| Roth IRA | $7,500 | $8,600 | Phase-out: $150,000–$165,000 (single) |
| Roth IRA (married) | $7,500 | $8,600 | Phase-out: $236,000–$246,000 |
The IRA catch-up for age 50+ rose from $1,000 to $1,100 for 2026 due to SECURE 2.0 indexing.
SECURE 2.0 key changes for IRAs in 2026: (1) The catch-up contribution is now indexed to inflation, rising from $1,000 to $1,100. (2) Required Minimum Distributions (RMDs) start at age 73, not 72. (3) Roth accounts inside employer plans (401k, 403b) are now RMD-free during the owner's lifetime — a significant change that makes Roth accounts more valuable for high-net-worth savers.
The core maths: a direct comparison
Both accounts start with $7,500 invested at 7% for 30 years. The only variable is when you pay tax.
| Scenario | Traditional IRA | Roth IRA |
|---|---|---|
| Contribution (22% bracket) | $7,500 pre-tax (saves $1,650 now) | $7,500 post-tax (no deduction) |
| Balance after 30 years at 7% | $57,100 | $57,100 (identical growth) |
| Tax on withdrawal (22%) | −$12,562 | $0 |
| Net retirement value | $44,538 | $57,100 |
| Tax saving invested separately | $1,650 at 7% for 30yr = +$12,562 | — |
| True net (tax saving reinvested) | $57,100 | $57,100 |
The maths is precisely equal when your tax rate is the same now and in retirement. The only real question is: will your bracket be higher or lower when you withdraw? If higher in retirement → Roth wins. If lower in retirement → Traditional wins. If the same → it genuinely does not matter mathematically.
Who should choose Roth in 2026
Early career earners in the 10%-12% bracket. If you are earning under $47,150 (single, 2026), you are in the 12% bracket. Most people's income grows over their career. Paying 12% now to avoid paying 22% or higher later is almost certainly the right call.
High earners with long investment horizons. On a $7,500 Roth contribution at age 30, compounding tax-free for 35 years at 7% produces $105,000 in completely tax-free money. The same Traditional IRA contribution produces $105,000 minus your future withdrawal tax rate.
Anyone who expects higher taxes in the future. Tax rates are at historically moderate levels. The current 2017 Tax Cuts and Jobs Act provisions are scheduled to expire in 2025 (though most have been extended). Future political pressure on deficits could raise rates at any time. A Roth contribution is a hedge against higher future taxes.
Anyone who does not need to take RMDs. Traditional IRAs require minimum distributions starting at age 73 — you must withdraw whether you need the money or not, potentially pushing you into a higher bracket. Roth IRAs have no RMDs during the owner's lifetime.
Who should choose Traditional IRA in 2026
High earners in the 32%-37% bracket. If you are earning $250,000+ and expect to retire on $150,000 equivalent, you are paying 32-35% now to later pay 22%. The immediate deduction is far more valuable.
Anyone who will be in a lower bracket in retirement. If your retirement income will come from Social Security ($24,000-$36,000/yr average), modest pension, and conservative portfolio withdrawals, your effective tax rate in retirement may be 12-15% — well below your working bracket.
Anyone ineligible for Roth due to income limits. Above $165,000 single / $246,000 married (2026), you cannot contribute directly to a Roth IRA. You can use the Backdoor Roth strategy (contribute to Traditional, then convert) if you have no other Traditional IRA balance.
The Backdoor Roth IRA in 2026
For high earners above the Roth income limit, the Backdoor Roth is a legal workaround: contribute $7,500 to a non-deductible Traditional IRA (no income limit for contributions, only for deductibility) and immediately convert it to a Roth IRA. There is no tax on the conversion if no earnings have accumulated between contribution and conversion.
The pro-rata rule: If you have other pre-tax Traditional IRA money, the conversion is taxed proportionally. This is the primary trap. Example: $7,500 non-deductible + $92,500 existing pre-tax Traditional IRA = $100,000 total. Converting $7,500 means 92.5% ($6,938) is taxable. The Backdoor Roth only works cleanly if you have no other Traditional IRA balances.
The Mega Backdoor Roth: the 2026 strategy high earners are using
If your employer 401(k) plan allows after-tax contributions and in-service distributions, you can contribute up to the total 401(k) limit ($72,000 in 2026 including employer contributions) in after-tax dollars, then convert to a Roth IRA or Roth 401(k) immediately. This creates a Roth contribution of up to $47,500 per year beyond the standard $24,500 pre-tax limit.
Not all 401(k) plans offer this. Check your Summary Plan Description or ask your HR department whether your plan permits after-tax contributions and in-plan Roth conversions.
By income: which to choose in 2026
| Income (single filer) | Federal bracket | Recommendation |
|---|---|---|
| Under $47,150 | 10% / 12% | Roth — almost always |
| $47,150 – $100,525 | 22% | Roth or split — depends on retirement income expectation |
| $100,525 – $165,000 | 24% | Roth if eligible; consider Backdoor Roth above $150K phase-out |
| $165,000 – $243,725 | 32% | Backdoor Roth or Traditional — depends on projected retirement income |
| Above $243,725 | 35% – 37% | Maximise Traditional / Mega Backdoor Roth |
Use our Retirement Planner to model your projected retirement income. If your expected retirement income is significantly below your current income, Traditional IRA likely wins. If similar or higher, Roth wins. Run both scenarios with our Tax Estimator to compare.