Mega Backdoor Roth Calculator
Some employer retirement plans let employees contribute a percentage of their paycheck to an after-tax 401k. For high earners, those after-tax 401k contributions can then be rolled over into a Roth IRA. This is what's called the Mega Backdoor Roth. It enables high earners to save into a Roth even if their income is above the Roth IRA limits.
Calculating what percentage to contribute before tax versus after tax, while factoring in your employer's match and a potential future bonus, can be a tricky math problem. It gets even trickier if you get a raise mid-year and your old percentages become outdated. I used to maintain a spreadsheet that helped with this calculation, but now with LLMs, why not create a full-fledged application!
The calculator below takes you through the steps to figure out the contribution percentages that will max out your savings for the year.