A SEP-IRA can be opened any time before you file your tax return and you can make prior-year contributions at that time. In contrast, a solo-401(k) must be opened and contributed to before the year end to count for that tax year.
In this podcast, I discuss my recent article “Account Funding Priorities for 2022” and describe a savings waterfall for 2022. The idea is when new money flows your way, which one of these buckets is it going to land in?
Putting all of your retirement eggs in one basket is easy to carry, but risky. Fund your employer’s plan with no more than is necessary to get the match and then fund your Roth IRA and build your taxable savings.