You can change how much you contribute at any time. Here is how to do it, and when the change starts.
Change your contribution
Log in at app.basiccapital.com.
Go to the ‘Contributions’ section and click ‘Update payroll deduction.’
On the ‘Set up your contribution’ screen, you can use the + and − buttons to toggle your contribution rates for both Traditional and Roth 401(k). If your plan has Mega Backdoor Roth enabled, it shows as its own bucket.
Click ‘Continue’ and then ‘Confirm’ your contribution rates to verify your choices.
When the change takes effect
Contribution changes typically take effect within 1 to 2 pay cycles, depending on your employer’s payroll software and schedule. A change made close to a payroll cutoff rolls into the following cycle instead.
Roth, traditional, and the employer match
Your own money can go to Roth, Traditional, or a split, each with its own percentage. The employer match is deposited only into your Traditional 401(k), even if your employee deferrals go into Roth. This is a plan-level decision by your plan admin, not something you change in the app. Some plans have no employer match at all.
Contribution limits
The 2026 IRS elective-deferral limit is $24,500. If you round up to a whole percent and hit your annual limit, we automatically stop your contributions for the rest of the tax year, so there is no risk of over-contributing.
Percentages vs. dollar amounts
Today contributions are set as whole-number percentages of salary for most companies because of restrictions set by payroll providers. A dollar-based deduction feature is in beta with select plans and will be fully rolled out by September 2026. Please reach out to [email protected] for more information.
Mega Backdoor Roth
A Mega Backdoor Roth lets you put after-tax dollars into your 401(k) above the normal employee deferral limit of $24,500, up to the much higher total annual limit of $72,000 that covers employee plus employer contributions. Those dollars go into your Roth 401(k) account, so all future growth comes out tax free.
Mega Backdoor Roth is a plan level feature your plan admin enables after a compliance review. It is not something an individual toggles on. When enabled it appears as its own contribution bucket.