Tax Planning
SEP-IRA Alternatives Worth Comparing
A SEP-IRA is a good default and a bad universal answer. People usually go looking for an alternative for one of three reasons: they hired someone, they want to put more away, or they want Roth treatment. Each reason points somewhere different.
01If the problem is employees
A SIMPLE IRA is the usual next stop. Instead of the employer mirroring whatever rate the owner takes, employees defer their own salary and the employer provides a defined match or a fixed contribution. The employer cost becomes predictable rather than proportional to the owner's ambition. It comes with its own eligibility and notice requirements — see the IRS SIMPLE IRA page.
02If the problem is contribution room
A solo 401(k) generally allows a larger total contribution at the same income, because you contribute in two capacities: as the employee, through salary deferral, and as the employer. At lower income levels that difference is significant. The trade is administration — it is a genuine retirement plan, and once assets pass a threshold there is an annual filing obligation. The IRS one-participant 401(k) page covers the structure.
03If the problem is Roth treatment
A SEP is traditionally pre-tax: deduct now, pay tax on withdrawal. If you would rather pay tax now and withdraw tax-free later — which can make sense in a low-income year, or early in a business — a Roth IRA or a Roth option inside a solo 401(k) is the route. The right answer here depends on whether your marginal rate today is higher or lower than you expect it to be in retirement, which is a forecast, not a fact.
04If the problem is that you have a job as well
Plenty of self-employed people also have W-2 employment with a workplace plan. Your salary deferrals are limited across all plans in aggregate, not per plan, while employer contributions follow different rules. This is the situation where people most often over-contribute without realising, and it is worth checking before December rather than in April.
05The option people forget
Doing less. If cash flow is tight, a smaller contribution to a simpler account beats a larger contribution you have to pull back out. Excess contributions carry correction procedures and, if left, penalties. I would rather see someone contribute modestly and consistently than max out once and spend the next year unwinding it.
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