Roth IRA explained: contributions, limits, withdrawals

The Roth IRA is the single most consumer-friendly retirement account in the US tax code, and for most middle-income US workers it is also the most under-used. Created by the Taxpayer Relief Act of 1997 and named for Senator William Roth of Delaware, the account reverses the conventional Traditional IRA arrangement: the contribution goes in with after-tax dollars (no upfront deduction), but the growth and qualified withdrawals are completely tax-free for the lifetime of the account holder. The trade-off looks unfavorable at first glance and turns out to be structurally favorable for most workers under the right conditions.

This guide is a working reference for the Roth IRA: who qualifies, what the 2026 contribution and income limits are, the five-year rule and the qualified-distribution rules, the three structural advantages over a Traditional IRA, the strategic situations where the Roth choice is wrong, and the backdoor Roth mechanic for high-income earners who exceed the direct contribution limits. Every limit and threshold is sourced to the IRS or to the relevant statute; nothing here is folklore.

What a Roth IRA is, mechanically

A Roth Individual Retirement Account is a tax-advantaged investment account designed for retirement savings. The account is opened at a custodian — a brokerage (Fidelity, Schwab, Vanguard), a bank, or a fintech (Wealthfront, Betterment, M1) — and held in the account holder’s individual name. Inside the account, the holder can invest in essentially any publicly traded security: index funds and ETFs, individual stocks, bonds, mutual funds, target-date funds. The account itself is just a wrapper; the investment choices inside are the holder’s.

The defining feature of the Roth wrapper is the tax treatment. Contributions to a Roth IRA are made with after-tax dollars — meaning the income was already taxed at your marginal rate before you contributed it. There is no upfront tax deduction for the contribution. The contributions grow inside the account tax-free; you pay no tax on dividends or interest earned inside the Roth, and none of the capital gains tax that selling or rebalancing would trigger in a taxable account. When you eventually withdraw the money in retirement (or earlier under qualifying circumstances), the entire withdrawal is tax-free at both federal and state levels.

The other side of the same coin is the Traditional IRA: contributions are tax-deductible at the time you make them (lowering your current-year tax bill), growth is tax-deferred inside the account, and withdrawals in retirement are taxed at your then-current ordinary-income rate. The two accounts are structurally symmetric: the Roth taxes the contribution and exempts the withdrawal; the Traditional exempts the contribution and taxes the withdrawal. Which is better depends on the relationship between your tax rate today and your tax rate in retirement, plus a handful of secondary considerations covered below and in the Roth vs Traditional comparison.

2026 contribution and income limits

The IRS adjusts the contribution and income limits each year based on inflation. The confirmed 2026 figures (from IRS Notice 2025-67) are:

• Contribution limit (under age 50): $7,500 per year.
• Catch-up contribution (age 50 and over): $8,600 per year — the standard $7,500 plus a $1,100 catch-up.
• Income phase-out for direct contributions, single filers: phase-out begins at modified adjusted gross income (MAGI) of $153,000 and ends at $168,000. Contributions are reduced linearly within the phase-out range; above $168,000, direct Roth contributions are not permitted.
• Income phase-out for direct contributions, married filing jointly: phase-out begins at MAGI of $242,000 and ends at $252,000. Above $252,000, direct contributions are not permitted.
• Income phase-out for direct contributions, married filing separately: phase-out begins at MAGI of $0 and ends at $10,000. (This unusually narrow range is structural; the rationale is that married-filing-separately filers should not be able to use the same income brackets as joint filers.)

The 2027 limits have not been published — the IRS announces them each October. See the contribution limits guide for the full table across all account types.

The contribution limit is per individual, not per household. A married couple in which both spouses earn income can each contribute the full $7,500 ($15,000 total, or $17,200 with both catch-ups) regardless of how the earned income is split between them, subject to the spousal IRA rules (the non-earning or low-earning spouse can contribute against the earning spouse’s income up to the same limit).

The contribution limit is shared between the Roth IRA and the Traditional IRA combined. A worker who contributes $5,000 to a Roth IRA and $2,500 to a Traditional IRA in the same year has used the full $7,500 limit; they cannot then contribute additional amounts to either account.

The contribution deadline for any tax year is the tax filing deadline (typically April 15 of the following year). A 2026 Roth IRA contribution can be made any time from January 1, 2026, through April 15, 2027.

Earned income requirement

To contribute to any IRA (Roth or Traditional), the holder must have earned income for the year — wages, self-employment income, certain alimony for divorces finalized before 2019. Investment income, rental income, pension income, and Social Security do not qualify as earned income for IRA contribution purposes. The contribution amount cannot exceed the earned income for the year; a worker who earned $3,000 in 2026 can contribute at most $3,000 to their Roth IRA, not the full $7,500.

There is no upper age limit on Roth IRA contributions — a working octogenarian with $7,500 of earned income can contribute the full amount. (Before the SECURE Act of 2019, Traditional IRAs had an age 70½ contribution cutoff; Roth IRAs never did. SECURE removed the Traditional limit too, so the two are now symmetric on age.)

The five-year rule and qualified distributions

The Roth IRA’s tax-free-withdrawal benefit comes with two timing-based qualifying conditions: the account must have been open for at least five years (the “five-year rule”), and the account holder must have a qualifying event for the withdrawal.

The five-year rule is measured from January 1 of the tax year of the first Roth IRA contribution. A contribution made in February 2026 for tax year 2026 starts the five-year clock on January 1, 2026; the qualifying period ends January 1, 2031. A contribution made on April 1, 2027, for tax year 2026 (a “prior-year contribution” allowed up to the tax filing deadline) also starts the clock on January 1, 2026 — the calendar year matters, not the contribution date.

A withdrawal is a “qualified distribution” — meaning entirely tax-free and penalty-free — if the five-year rule is satisfied and one of the following conditions is met:

• The account holder is age 59½ or older.
• The account holder has died and the withdrawal is to the beneficiary.
• The account holder has become disabled (per the IRS definition).
• The withdrawal is up to $10,000 for a first-time home purchase (lifetime limit).

If the withdrawal is not a qualified distribution, the tax treatment splits between contributions and earnings. Contributions can be withdrawn at any time, for any reason, with no tax and no penalty. This is a unique feature of the Roth IRA among retirement accounts and is the structural reason it doubles as an emergency-fund vehicle for some consumers. Earnings withdrawn before the qualifying conditions are met are subject to both ordinary income tax and a 10% early-withdrawal penalty.

The five-year clock is restarted by a Roth conversion (a Traditional-to-Roth transfer) but only on the converted amount; the clock continues running on contributions made before the conversion.

The three structural advantages over Traditional IRA

The Roth-vs-Traditional decision is the subject of its own comparison guide, but three structural advantages of the Roth are worth flagging here because they apply regardless of the tax-rate-today-vs-retirement question.

Advantage 1: contributions are always accessible without tax or penalty. Because the contributions were made with after-tax dollars, the IRS does not penalize early withdrawal of the contribution amount — you have already paid the tax. This means a Roth IRA functions as a tax-advantaged emergency fund: the contributions can come out for any reason, at any time, without consequence. The Traditional IRA does not have this feature — early withdrawals from a Traditional IRA face both ordinary income tax (because the contribution was tax-deductible) and the 10% early-withdrawal penalty.

Advantage 2: no Required Minimum Distributions during the account holder’s lifetime. A Traditional IRA holder must begin taking Required Minimum Distributions (RMDs) at age 73 (rising to 75 in 2033 under the SECURE 2.0 Act), with each year’s RMD calculated as a percentage of the account balance and added to taxable income. A Roth IRA has no RMD during the account holder’s lifetime — the holder can leave the entire balance to grow tax-free indefinitely and pass it to heirs untaxed at the holder’s death (the heirs then have their own RMD schedule under the SECURE Act’s 10-year inherited-IRA rule).

Advantage 3: tax-rate certainty in retirement. A Roth IRA withdrawal at age 70 is tax-free regardless of what the federal income tax brackets look like in the year of the withdrawal. A Traditional IRA withdrawal is taxed at whatever the prevailing rate is. For a worker who believes federal income tax rates are likely to rise over their retirement horizon (a defensible thesis given the long-term US fiscal trajectory), the Roth captures today’s tax rate certainly and protects against future increases. The Traditional accepts the future tax rate risk.

When the Roth is the wrong choice

The Roth is structurally favorable for most middle-income workers most of the time, but several situations favor the Traditional instead:

• High-bracket workers contributing to a Traditional 401(k) at full deferral: a 35%-bracket worker maxing their 401(k) at $24,500 (2026 limit) captures a $8,575 immediate federal tax saving. If they will retire in a much lower bracket (say 12%), the Traditional captures the differential. The Roth foregoes the upfront deduction.
• Workers close to retirement with high current income and known lower retirement income: someone earning $300,000 a year for the next two years before retiring on Social Security plus modest taxable distributions has a known tax-rate drop. The Traditional captures the drop.
• Workers who plan to give significantly to charity from retirement assets: Qualified Charitable Distributions (QCDs) from a Traditional IRA can satisfy RMDs and reduce taxable income; a Roth IRA does not benefit from this mechanic because the distributions are not taxable anyway.

For most workers in the 22% or 24% federal bracket with a typical retirement horizon, the Roth is the structurally favored choice. The exceptions are real but specific.

The backdoor Roth IRA — for high earners above the phase-out

Workers whose MAGI exceeds the direct-contribution phase-out ($168,000 single, $252,000 married filing jointly in 2026) cannot make direct Roth contributions. They can, however, execute a backdoor Roth contribution: a non-deductible contribution to a Traditional IRA followed by an immediate Roth conversion. The legal mechanics are:

1. Open both a Traditional IRA and a Roth IRA at the same custodian (or two custodians).
2. Make a non-deductible contribution to the Traditional IRA — up to the $7,500 limit.
3. Within a few days, convert the Traditional IRA to the Roth IRA. The conversion is taxable on any pre-tax balances in the Traditional IRA, but since the contribution was non-deductible (no upfront tax saving), the only taxable portion is any earnings between the contribution date and the conversion date — typically near zero if done within days.

The backdoor Roth is fully legal under IRS guidance and has been since 2010, when the income limit on Roth conversions was removed. It is documented in IRS Form 8606 each year. The major pitfall is the pro rata rule: if the worker has any pre-tax balances in any Traditional IRA, SEP IRA, or SIMPLE IRA, the conversion taxes a pro-rata share of the entire IRA balance, not just the newly contributed non-deductible amount. Workers with pre-existing pre-tax IRA balances need to either roll those balances into a 401(k) (which is permitted) before executing the backdoor, or accept the pro-rata tax cost.

The backdoor Roth is a structural feature of the US tax code and is the primary way high-income earners participate in the Roth ecosystem. For workers with employer plans that permit it, the mega backdoor Roth is an even more powerful related mechanic that uses after-tax 401(k) contributions and conversion to allow up to roughly $46,500 of additional Roth contributions per year on top of the standard $7,500 limit.

How the Roth fits in the broader hierarchy

The Roth IRA is the third step in the standard US tax-advantaged account funding hierarchy, after capturing the 401(k) employer match and (if eligible) maximizing the Health Savings Account (HSA). The full hierarchy is covered in the tax-advantaged hierarchy guide, but the short version is:

1. 401(k) up to the full employer match. Highest-ROI dollar in personal finance.
2. HSA if eligible. The only triple-tax-advantaged account in the code.
3. Roth IRA up to the annual cap. Broader investment menu than the 401(k), structurally favorable tax treatment for most middle-income earners.
4. Maximize 401(k) up to the full $24,500 employee deferral (2026).
5. Mega backdoor Roth if the plan permits.
6. Taxable brokerage for additional savings beyond tax-advantaged capacity.

The placement at step 3 — after the match and the HSA, before maxing the 401(k) — reflects two structural facts: the Roth IRA has a wider investment menu than most employer 401(k) plans (so the marginal dollar earns more inside the Roth), and the Roth’s tax-free-growth benefit compounds more value over multi-decade horizons than the Traditional 401(k)‘s tax-deferred treatment for most middle-income workers.

Investment selection inside the Roth

The Roth IRA is a tax-advantaged wrapper; the investments inside it determine the actual return. The custodian — Fidelity, Schwab, Vanguard, or another brokerage — offers a menu of investment options that typically includes the full universe of publicly traded securities. The most common practical choice for a Roth IRA is one of three configurations.

Three-fund portfolio. Roughly 60% US total stock market index fund, 20% international total stock market index fund, 20% US bond market index fund — with the specific percentages tuned to age and risk tolerance. Younger workers tilt more to equities; workers approaching retirement tilt more to bonds. The expense ratios at the major brokerages on the underlying funds (FZROX or VTSAX for US total market, FZILX or VTIAX for international, FXNAX or VBTLX for bonds) are typically 0.00% to 0.04% — fractions of a basis point per year, which compounds to a meaningful advantage over actively managed alternatives over multi-decade horizons.

Target-date fund. A single fund that automatically rebalances from aggressive (mostly equities) toward conservative (mostly bonds) as the target retirement year approaches. Vanguard, Fidelity, and Schwab each offer target-date funds with expense ratios in the 0.08% to 0.15% range. The advantage is set-it-and-forget-it simplicity; the disadvantage is the slightly higher expense ratio relative to a manually constructed three-fund portfolio and less control over the glidepath. For workers who do not want to actively manage the allocation, the target-date fund is a structurally reasonable default.

Single broad-market fund. For the simplest possible configuration, a single US total stock market index fund (VTSAX at Vanguard, FZROX at Fidelity, SWTSX at Schwab) captures broad equity exposure with essentially no decision burden. The drawback is the absence of international diversification and bond exposure, which matters more for workers closer to retirement; younger workers with multi-decade horizons can hold a single-fund portfolio for years and rebalance into a three-fund or target-date structure later.

The investment choice matters far less than the contribution rate and the consistency. A worker who contributes $7,000 to a target-date fund every year for thirty years will substantially outperform a worker who agonizes over the perfect allocation but contributes less consistently. The Roth IRA’s structural advantages are realized through the contribution itself; the investment menu is the second-order optimization.

Common mistakes new Roth holders make

Several recurring mistakes show up in Roth IRA accounts that are worth flagging.

Leaving contributions in the cash sweep account. Some custodians automatically deposit your Roth contribution into the brokerage’s cash sweep account (a money market or interest-bearing default), and the contribution sits there earning a small variable rate until the holder manually invests it. The contribution is in the Roth — so the technical tax-advantaged status is preserved — but the actual growth that the Roth structure is meant to capture is foregone. The fix is to set up an automatic investment into a target-date fund or index fund each time the contribution is made, so the dollars are actually deployed.

Not contributing for the prior tax year. Roth contributions for a tax year can be made any time from January 1 of that year through April 15 of the following year. A worker who realizes in March that they have not contributed for the prior tax year still has a few weeks to do so. Many workers miss the window because they assume the contribution deadline is December 31; it is not, and the prior-year window can be used to capture both the prior year and the current year contributions in the same calendar quarter for workers who want to front-load.

Withdrawing earnings before the qualifying conditions. As covered above, withdrawing earnings (not contributions) before age 59½ or before satisfying the five-year rule triggers both ordinary income tax and a 10% early-withdrawal penalty. The penalty applies to the earnings portion only — the contribution portion of any withdrawal is always tax-free and penalty-free — but the IRS ordering rules treat contributions as withdrawn first, so a holder needs to know how much of their balance is contribution vs earnings before drawing down.

Misunderstanding the income phase-out as a cliff. The income phase-out is a linear reduction across the range, not a binary cutoff. A single filer with MAGI of $160,500 — halfway through the $153,000 to $168,000 phase-out range — can still contribute roughly half of the $7,500 limit. Many workers near the phase-out incorrectly assume they cannot contribute at all once they enter the range. The partial contribution is still allowed and is documented by the custodian on Form 5498 — the informational form that arrives in May and is worth keeping permanently.

Multi-year contribution strategy

A worker contributing the full annual limit consistently captures the structural compound-growth benefit the Roth is designed for. The math illustrates the magnitude. A worker who contributes $7,000 per year from age 25 to age 65 — forty years of contributions, $300,000 total — and earns a 7% real annual return inside the Roth accumulates a tax-free balance of approximately $1.6 million at age 65. The same dollars invested in a taxable brokerage account at the same return rate, assuming a 22% federal capital gains rate plus 5% state, accumulate to approximately $1.2 million after tax — a roughly $400,000 difference attributable entirely to the Roth wrapper.

The same worker who waits until age 35 to start contributing the same $7,000 per year accumulates roughly $750,000 by age 65. The ten-year delay costs more than half the total because the early contributions compound for the longest period.

The implication is that the highest-leverage Roth IRA action a worker can take is start as early as possible — even with smaller contributions in the early years when income is lower — because the early dollars compound across the most years. A 25-year-old contributing $2,000 a year captures more compound growth than a 35-year-old contributing $4,000 a year over the same future period.

Sources

• 2026 contribution and income limits: IRS — IRA contribution limits. Authoritative federal source updated annually.
• Five-year rule and qualified distributions: IRS Publication 590-B. The official guide to IRA distributions.
• Early withdrawal penalty (10%) and exceptions: IRS — Topic 558.
• Backdoor Roth conversion mechanics: IRS Form 8606 Instructions and the broader Roth conversion guidance in Publication 590-B.
• SECURE Act and SECURE 2.0 changes to RMD age: IRS — Required Minimum Distributions.

Every limit on this page is a 2026 figure and will be adjusted by the IRS for 2027 (typically published in fall 2026). The structural rules — five-year clock, qualified distribution conditions, ordering of withdrawals — are stable and have been substantially unchanged since the Roth IRA was created in 1997, with the major exception of the 2010 removal of the income limit on Roth conversions, which created the backdoor Roth mechanic.