The Mega Backdoor Roth: How Veterinary Practice Owners Can Add $41,500 in Tax-Free Retirement Savings
Most practice owners max out their 401(k) employee contribution, $24,500 in 2026 for those under 50, and assume that's the ceiling. It isn't. If your plan is built correctly, there's another $41,500 of tax-advantaged room sitting unused, and almost nobody uses the strategy that unlocks it: the Mega Backdoor Roth.
Here's how it works
The IRS caps total 401(k) contributions, employee and employer combined, at $72,000 for 2026. Once your employee deferral ($24,500) and employer match (say, $6,000) are accounted for, there's still $41,500 of room left in that limit. A properly designed plan lets you fill that room with after-tax contributions, then convert them to Roth, which means the growth and the eventual withdrawals are both tax-free.
Why this matters more for practice owners
Your income likely phases you out of contributing to a Roth IRA directly. The Mega Backdoor Roth bypasses that limit entirely, since it works through your 401(k) instead.
As a practice owner, you also have more control over how your plan is designed than an employee at a corporate group does. That control is exactly what makes this strategy realistic and accessible for you, not just something you read about and can't actually use.
Our team can help design a plan that actually allows this, and our wealth advisors can help you decide whether and how to use it as part of your broader retirement and tax strategy. That's what building benefits that go toe to toe with the corporate groups, without giving up your independence, actually looks like in practice.
The Mega Backdoor Roth isn't the only lever available if you're looking to shelter more income. A cash balance plan is worth a look too, particularly for owners further along in their career who want to put away significantly more each year. That's a separate conversation, but one worth having in the same breath.
Is your plan currently set up to allow this? Most aren't by default, it takes intentional plan design. That's exactly what we help with.
Want to know if your plan already allows this? Book a Discovery Call and we'll look at your plan together.
Let's make sure your retirement is as strong as the career you've built.
Frequently Asked Questions
It's a strategy that uses the gap between your 401(k) employee contribution and the IRS's total plan limit to make additional after-tax contributions, then converts them to a Roth. The result is tax-free growth and tax-free withdrawals in retirement.
The IRS total 401(k) limit in 2026 is $72,000. After your employee contribution ($24,500) and a typical employer match ($6,000), there is up to $41,500 of after-tax room remaining.
Not automatically. Your 401(k) plan must specifically allow after-tax contributions and either in-plan Roth conversions or in-service withdrawals. Many plans don't have this built in; it requires intentional plan design.
No. Option 1 (in-plan Roth conversion) keeps the money inside your 401(k) while converting it to the Roth bucket. No in-service withdrawal is required.
High-income practice owners are typically phased out of making direct Roth IRA contributions. The Mega Backdoor Roth bypasses those income limits entirely. As a practice owner, you also have more control over your plan structure than a corporate employee, making this a realistic, accessible option.
No. The standard Backdoor Roth IRA involves making a nondeductible traditional IRA contribution and converting it, capped at $7,000 in 2026. The Mega Backdoor Roth works through your 401(k) and allows you to contribute significantly more.
Review your Summary Plan Description or ask your TPA whether your plan allows after-tax contributions and in-plan Roth conversions. If it doesn't, it may be time to redesign the plan. That's exactly what we help ProPartners clients do.
Have questions about your practice or plan? A ProPartners advisor can talk through your specific situation, and the consultation is free.
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