Thanks to a provision in the Secure 2.0 retirement legislation, high-income earners (with $150,000 or more in FICA income in the prior year) who are over 50 and investing in 401(k) or other company retirement plans must make catch-up contributions to their plans' Roth option, rather than traditional tax-deferred contributions, starting this year.
Most employer 401(k) plans allow mid-year changes to the deferral election percentage. Before the bonus pay period, raise the deferral rate high enough to funnel as much of the bonus as possible into the 401(k), up to the annual limit.
A market downtown in the first few years of retirement, combined with regular withdrawals, can permanently damage a portfolio's ability to sustain income over time. The same downturn occurring 10 or 15 years later, when withdrawals have already been funded by earlier growth, does far less harm.