Roth or traditional? How freelancers should choose

Updated 2026-09-04

In its pure form, Roth versus traditional comes down to a single comparison: your tax rate now against your tax rate in retirement. Growth multiplies both sides equally, so it cancels out.

The interesting part for freelancers is everything layered on top — which vehicles allow both, why volatile income is an advantage rather than a problem, and the AGI interactions that can be worth more than the rate comparison itself.

Start with the only comparison that matters

Roth or traditional is treated as one of the hardest questions in personal finance. In its pure form it is one of the easiest. Both accounts invest money that grows by the same factor, so the growth cancels out of the comparison and you are left weighing two numbers: your tax rate now against your tax rate when you withdraw.

Lower rate later, deferring the tax wins. Higher rate later, paying upfront wins. Equal rates and the two are identical. That is the whole of it, and the Roth vs traditional calculator will produce the answer from those two rates plus the break-even retirement rate that flips the result.

Everything else — the thirty-year projections, the assumed returns, the compounding charts — is decoration on top of that one comparison. This article is about the decoration, because for a freelancer some of it genuinely changes the answer.

Your vehicle decides whether you even have a choice

Employees usually get a menu. Freelancers get whatever the account type permits, and that varies more than people expect:

• Solo 401(k). The most flexible option for most freelancers. Many plans allow both traditional and Roth employee contributions, so you can split them. Employer contributions are always pre-tax. It also typically permits the largest total contribution on a given amount of profit.
• SEP IRA. Traditional only. There is no Roth SEP, so the question does not arise — you defer, or you use a different vehicle. Simple to run and generous on limits, but no Roth option and no employee deferral feature.
• SIMPLE IRA. Generally permits both traditional and Roth employee contributions depending on the plan, with lower limits than a Solo 401(k). Suited to freelancers with employees.
• Traditional or Roth IRA. Available alongside any of the above, but with much lower annual limits and income restrictions on Roth contributions — and on deducting traditional contributions if you are covered by a workplace plan. The Solo 401(k) contribution calculator shows how much more the business vehicles typically allow.

If splitting contributions matters to you — and for freelance income it usually should — the Solo 401(k) is normally the vehicle that makes it possible. That is worth checking before you open anything.

Volatile income is an advantage, not just a problem

Freelancers often treat income variability as something to be smoothed over. For this decision it is the closest thing to a free lunch that exists in tax planning, because you get to choose which year you pay tax in.

The rule follows straight from the maths: Roth in low-income years, traditional in high-income years. In a lean year your marginal rate is low, so paying tax upfront is cheap — you are buying a permanent tax-free bucket at a discount. In a bumper year the deduction is worth most, so deferring saves real money precisely when it matters.

An employee with a flat salary never gets this choice. A freelancer whose income swings between $60,000 and $180,000 can end up with meaningful amounts in both buckets without ever having had to predict their retirement tax rate correctly. You are not betting on one outcome; you are collecting options across years.

The AGI interactions freelancers should check

Beyond the headline comparison, traditional contributions reduce your adjusted gross income this year, and for a freelancer that can trigger several things at once. These are worth pricing before you decide:

• Marketplace premium tax credit. If you buy your own health cover, your MAGI sets the subsidy you receive. A traditional contribution lowers MAGI and can increase that credit — which, combined with the self-employed health insurance deduction, is one of the strongest practical arguments for traditional contributions among freelancers who are not yet earning high incomes.
• The QBI deduction. Employer contributions to a SEP or Solo 401(k) generally reduce the qualified business income that the 20% deduction is calculated on, while employee Roth contributions do not. The interaction depends on the contribution type and your income level, so it is worth modelling both ways rather than assuming.
• Income-driven student loan repayment. Lower AGI lowers IDR payments. For anyone on an income-based plan, a traditional contribution can reduce required payments in addition to cutting tax.
• Phase-outs and thresholds. Numerous credits and deductions taper as income rises. A contribution that pulls you just under a threshold can be worth far more than your marginal rate alone.

None of these change the core comparison — they are added on top of it. But they are large enough that a freelancer earning a moderate income with Marketplace cover should check the premium tax credit interaction before defaulting to Roth.

A year-by-year playbook

A simple rule set that requires no forecasting:

• Lean year. Your rate is low, so Roth is cheap. Fill the Roth side. If you can spare the cash, this is the best-value Roth contribution you will ever make.
• Normal year. Split. Roughly half to each, adjusted toward whichever side you are currently underweight in. Tax diversification is the goal, not optimality.
• Bumper year. The deduction is worth most now. Load the traditional side — especially if you are near a threshold where the AGI reduction unlocks something else.
• Uncertain year. Split. When you genuinely cannot tell where your income will land, contributing to both is the answer, because it means you do not have to be right.

Revisit the split annually rather than setting it once. Freelance income moves enough that a fixed allocation is usually wrong within two years.

The mistake that costs far more than choosing wrong

People spend hours optimising between Roth and traditional and then contribute late, contribute irregularly, or contribute nothing while they wait to decide which is better. The gap between a good choice and a perfect choice here is small. The gap between contributing consistently for twenty years and not is enormous.

Decide in ten minutes using the rate comparison and this year's income, automate it, and revisit the split once a year when you know where your income landed. If you have genuinely no idea and no Marketplace subsidy at stake, splitting evenly is a defensible default that you will never badly regret.

And remember the asymmetry: if you are maxing out your contributions, a Roth contribution shelters more real wealth than a traditional one, because both share the same dollar limit. That single fact is often enough to break a tie.