Mega Backdoor Roth Contribution Limit 2025 Calculator. The max 401 (k) limit is $69,000 for 2025, which includes deferrals, employer matches, profit sharing and other deposits. A mega backdoor roth refers to a strategy that can potentially allow some people who would be ineligible to contribute to a roth account, based on their income or contribution limits, to transfer.

With a mega backdoor roth, you may be able to contribute an additional $43,500 toward retirement in 2023 — on top of your regular plan contribution limits. Yes, mega backdoor roths are still allowed in 2025.