Annex Wealth Management's Guide to Catch-Up Contributions After 50

What do catch-up contributions after 50 add to a 401(k) or 403(b)?

For 2026, catch-up contributions after 50 add $8,000 after you defer the regular $24,500 employee limit in a 401(k), 403(b), governmental 457 or TSP. That makes $32,500 available for employee deferrals, and the IRS lets you qualify for the full calendar year in which you turn 50, even with a December birthday.

The extra amount is not a second door into the plan. A dentist who defers only $20,000 has not reached the regular limit, so the catch-up election adds nothing yet. Annex Wealth Management puts this check before investment choices because the monthly contribution has to fit the spending plan.

The IRA rule sits separately. In 2026, the traditional and Roth IRA limit combined is $7,500, with a $1,100 catch-up at age 50 or older, for $8,600 total. For a SIMPLE IRA catch-up, check the current IRS limit rather than borrowing a number from another plan.

• 401(k), 403(b), governmental 457 or TSP
• Full-year eligibility at age 50
• Separate IRA catch-up
• SIMPLE IRA limit: check the IRS

Does the $150,000 wage test make your 401(k) catch-up Roth?

Yes. If the IRS test finds more than $150,000 of prior-year FICA wages from the employer sponsoring your plan, your catch-up must be Roth, so that portion receives no deduction. The test uses the Social Security wages box on that employer's W-2, not every dollar your practice produced.

For an S corporation owner, the W-2 salary counts. K-1 profit distributions do not. A sole proprietor with no W-2 wages is not caught by this particular wage test. If your plan has no Roth option, you cannot make catch-up contributions under the rule until the practice plan adds one; the plan administrator or TPA must confirm the mechanics.

The Roth rule turns the contribution into a cash-flow item. Find your pay level first, then the age row in the table, because the added tax is money the practice and household must carry this year.

Mark ages 60 to 63 on the calendar

The higher catch-up is $11,250 in each year you are age 60, 61, 62 or 63 on December 31. At 2026 limits, four full years add $45,000. The amount drops back to $8,000 in the year you turn 64, and you need pay from that employer in each year to use it.

A practice sale at 61 can close this window early. That deadline belongs in the same file as the sale estimate, not in the back of your mind.

• Age 60
• Age 61
• Age 62
• Age 63

How much can Farid add before the age-61 cutoff?

Farid, 51, and Siobhan, 49, are a hypothetical S corporation dental-practice household with one child starting college in three years. Farid paid himself a $180,000 W-2 salary last year, so his catch-up must be Roth. His K-1 profit does not change that result, and their practice 401(k) must offer Roth deferrals.

Starting next year, Farid is age 52. Holding today's limits flat for illustration, ages 52 through 59 produce eight years at $8,000: 8 × $8,000 = $64,000. Ages 60 and 61 produce two years at $11,250: 2 × $11,250 = $22,500. Added together, $64,000 + $22,500 = $86,500 before growth.

A practice sale at age 63 instead of 61 adds two more higher-limit years: 2 × $11,250 = $22,500. The total becomes $86,500 + $22,500 = $109,000. A sale at age 64 adds one regular $8,000 year instead, assuming Farid still has eligible pay. Moving the closing two years later is worth $22,500 of extra Roth room before growth.

Farid has to budget for the extra tax month by month. At an illustrative combined rate of 40%, an $8,000 Roth catch-up creates $8,000 × 40% = $3,200 of added tax, or $3,200 ÷ 12 = about $267 each month. At ages 60 and 61, $11,250 × 40% = $4,500, or $375 each month. That cash must sit beside college bills beginning in three years.

The contribution itself is $8,000 ÷ 12, about $667 each month, when spread over a year. Farid should not wait for December payroll if the practice can set the election in January. One late payroll can leave too little eligible pay to reach the amount.

Taking “always take the deduction in your peak earning years” too literally leaves Farid expecting a $3,200 tax saving that never arrives. His $180,000 W-2 forces the catch-up into Roth, and the missing cash can show up as an unplanned April bill.

Annex Wealth Management uses a plain rule here: if prior-year W-2 wages from the plan's employer topped $150,000, calculate the catch-up amount times your marginal rate and reserve that tax in the monthly plan before increasing payroll deferrals. If the cash is not there, fund the regular $24,500 first and return to the catch-up later. Invested catch-up dollars carry market risk, and the account can end up worth less than the amount contributed.

Should the Roth catch-up beat the practice loan?

Roth catch-up, loan paydown and a lower S corporation salary solve different problems. Compare the tax paid this year, the tax on later income draws, the monthly cash required and what happens to the $400,000 practice loan before picking one.

A Roth catch-up costs $3,200 more tax at an illustrative 40% rate on an $8,000 contribution, with $667 contributed each month and tax-free qualified income draws later. Sending the same $8,000 to a practice loan at a hypothetical 7% rate saves $8,000 × 7% = $560 of interest in year one, a fixed result with no market exposure. The wage test looks at the prior year's W-2. Lowering this year's W-2 below $150,000 therefore cannot change this year's Roth requirement. It may only allow a pre-tax catch-up next year. It also raises a reasonable-compensation question with the IRS and lowers the pay used for employer contributions. A CPA should sign off on that move.

Two dentists, both age 52, can reasonably choose differently. One has a fixed practice loan at a hypothetical 4% and $3,000 of monthly surplus, so the Roth catch-up can come first. The other has a variable loan at a hypothetical 9% and only $700 of surplus, so loan paydown comes first and the catch-up waits for the age 60 through 63 window.

The honest limit matters: catch-up contributions do nothing until you already defer the full $24,500. For a high earner, the catch-up comes with no deduction. It is not worth squeezing ahead of an emergency reserve or a high-rate variable practice loan.

• Roth catch-up
• Loan paydown
• Lower S corporation salary

Why should Siobhan's W-2 be checked separately?

Siobhan, 49, earns $55,000 on the practice payroll and turns 50 next year. Her wages are under $150,000, so her catch-up can remain pre-tax if the plan permits and her pay leaves room after regular deferrals. Farid's Roth requirement does not automatically transfer to her. A Roth account passed to their child can provide qualified income draws without income tax, but a non-spouse heir generally must empty the account within ten years.

Can a Roth catch-up election be undone later?

A payroll election can usually change for future pay periods under the plan's rules, but a Roth catch-up already deposited cannot be switched back to pre-tax. In-plan Roth conversions cannot be recharacterized, and a missed calendar year cannot be recovered because the deferral must come from that year's pay.

For an S corporation owner, the final December payroll is the practical deadline. If a plan wrongly ran a high earner's catch-up as pre-tax, ask the plan administrator how the correction will be made and by what date. Annex Wealth Management treats that payroll record as paperwork to resolve, not a detail to discover after filing.

• Payroll election can change forward
• Deposited Roth money stays Roth
• Missed calendar year cannot return
• Administrator corrects plan errors

What should you ask the CPA and plan administrator before payroll starts?

Start with the paperwork in order. Pull last year's practice W-2 and read the Social Security wages box. Then confirm the plan's Roth feature with the TPA, put the added tax into the monthly spending plan, and set the election in January so it spreads over each paycheck.

Ask the plan administrator:

• Read last year's practice W-2
• Confirm Roth in the plan
• Reserve added monthly tax
• Set the election in January

Questions for the plan administrator

These questions identify the plan's actual payroll process. The administrator should also explain what happens if the election is corrected late, since a December fix may not have enough eligible pay remaining.

Ask the CPA:

• Does payroll apply the Roth rule automatically?
• Which wage figure drives the $150,000 test?
• How often can the election change?
• Is the age 60–63 amount coded in payroll?

Questions for the CPA

The CPA can test the salary decision against the practice's facts and tax filings. Keep the $150,000 threshold separate from K-1 distributions, and do not lower salary merely to preserve a deduction without that review.

• Does the W-2 support reasonable compensation?
• How will Roth change estimated payments?
• Should Siobhan keep her catch-up pre-tax?

Where Annex Wealth Management starts in your W-2 and plan paperwork

Annex Wealth Management would read last year's practice W-2 and the 401(k) plan document's Roth provisions first. It would then check whether the catch-up's added tax fits the monthly spending plan, and compare the planned practice-sale age with the age 60 through 63 window.