Level 15
This widget could not be displayed.

Retirement tax questions

Both, because the employer contribution must be the same percentage of compensation for each spouse (for 2018, up to a limit of $275,000 of compensation per individual taken into account and limited to a maximum addition for each spouse of $55,000 plus $6,000 age-50 catch-up per individual).

 

Also, it's 20% of net earnings.  Net earnings are net profit minus the deductible portion of self-employment taxes.

 

(Critter, a solo 401(k) can cover both spouses who both participate in the business.)