How a Roth IRA Works
You contribute money that has already been taxed (after-tax dollars). There's no deduction on your tax return for the year you contribute. But from that point forward, the money grows tax-free — and when you withdraw it in retirement (after age 59½), you owe nothing in taxes, not even on the decades of gains.
Another useful feature: you can withdraw your original contributions (not earnings) at any time, for any reason, without tax or penalty. The Roth IRA also has no Required Minimum Distributions during the account owner's lifetime, giving you full control over when and how much you withdraw.
How a Traditional IRA Works
Contributions may be tax-deductible, depending on your income and whether you (or your spouse) have a workplace retirement plan. The deduction reduces your taxable income today, which lowers your current tax bill. The money grows tax-deferred — meaning no tax on dividends or capital gains while it sits in the account.
When you withdraw in retirement, you pay ordinary income tax on everything you take out — your original contributions and all the growth. Starting at age 73, the IRS requires you to take out a minimum amount each year, called a Required Minimum Distribution (RMD), whether you need the money or not.
Side-by-Side Comparison
| Feature | Roth IRA | Traditional IRA |
|---|---|---|
| Tax on contributions | After-tax (no deduction) | Pre-tax (may be deductible) |
| Tax on growth | Tax-free | Tax-deferred |
| Tax on withdrawals | Tax-free (qualified) | Ordinary income tax |
| 2026 contribution limit | $7,000 ($8,000 if 50+) | $7,000 ($8,000 if 50+) |
| Income limits | Yes — phases out $146k–$161k (single) | Deductibility phases out with workplace plan |
| Early withdrawal penalty | 10% on earnings before 59½ (contributions OK) | 10% on all withdrawals before 59½ |
| Required Minimum Distributions | None during owner's lifetime | Start at age 73 |
| Best for | Younger investors, lower brackets now, expecting higher rates later | High earners today expecting lower income in retirement |
Source: IRS.gov, Publication 590-A and 590-B. Limits reflect 2026 figures.
Which Should You Choose?
The core question is: are you in a higher tax bracket now, or will you be in retirement?
Choose a Roth IRA if: you're early in your career and expect your income to grow, you're currently in a low or middle tax bracket (22% or below), you want tax-free income in retirement regardless of future tax law changes, or you want flexibility — the ability to withdraw contributions penalty-free if needed.
Choose a Traditional IRA if: you're in a high tax bracket today (32%+) and expect significantly lower income in retirement, you want to reduce your current taxable income, or you don't qualify for a Roth IRA due to income limits.
For most people in their 20s and 30s, the Roth IRA is the better default choice. The tax-free growth over 30–40 years is extraordinarily valuable, and most people end up in similar or higher brackets in retirement than they expect.
2026 Contribution Limits and Income Rules
Contribution limit: $7,000 per year, or $8,000 if you're 50 or older. This limit applies to your total IRA contributions — if you split contributions between a Roth and a Traditional IRA, the combined total still can't exceed $7,000.
Roth IRA income limits (2026):
- Single filers: full contribution allowed up to $146,000; phases out between $146,000–$161,000; not allowed above $161,000
- Married filing jointly: phases out between $230,000–$240,000
Traditional IRA deductibility limits (2026): If you or your spouse have a workplace retirement plan, the deduction phases out at certain income levels. Without a workplace plan, contributions are always deductible regardless of income.
Over the income limit for a Roth IRA? The Backdoor Roth strategy allows high earners to contribute to a Traditional IRA (non-deductible) and then convert it to a Roth IRA. It's a legal workaround that has been in use for over a decade. Consult a tax advisor before using this approach, as it has specific rules around pre-existing IRA balances.
Retirement Accounts in the UK, India, and Canada
The Roth vs Traditional debate is specific to the US, but similar tax-advantaged retirement structures exist elsewhere.
UK — Pension and ISA: The UK doesn't have IRAs, but workplace and personal pensions work similarly to a Traditional IRA — contributions get tax relief upfront, and you pay tax on withdrawals in retirement (25% is tax-free as a lump sum). A Stocks and Shares ISA is closer to a Roth IRA in structure: no tax relief on contributions, but all growth and withdrawals are completely tax-free. The annual ISA allowance is £20,000 for 2026/27. For retirement-specific saving, Lifetime ISAs allow up to £4,000/year with a 25% government bonus, for first home purchase or retirement from age 60.
India — NPS and PPF: The National Pension System (NPS) offers tax deductions under Section 80C (up to ₹1.5 lakh) and an additional ₹50,000 under Section 80CCD(1B). It functions similarly to a Traditional IRA — you get a deduction now, and withdrawals at retirement are partially taxable. The Public Provident Fund (PPF) is closer to a Roth structure — no deduction on contributions beyond the 80C limit, but the maturity amount is completely tax-free. PPF has a 15-year lock-in and earns a government-set interest rate, currently around 7.1%. More details are available via the India Post website, which administers PPF accounts.
Canada — RRSP vs TFSA: This is Canada's closest equivalent to the Traditional vs Roth debate. An RRSP (Registered Retirement Savings Plan) works like a Traditional IRA — contributions are tax-deductible, and withdrawals in retirement are taxed as income. A TFSA (Tax-Free Savings Account) works like a Roth IRA — no deduction now, but all growth and withdrawals are completely tax-free. For younger Canadians, many planners favour the TFSA for the same reasons US planners favour the Roth. More at CRA's TFSA page.
"When in doubt, younger investors should lean toward the Roth. The flexibility it provides — no RMDs, accessible contributions, tax-free compounding for decades — is hard to replicate with any other account type."