High income earner. Maxed out work 401k. What's next best step?

Retirement question - High-income w2 earner ( I’m over the IRA income limits, barely ).

I max out my employer’s 401k ( the contribution limit ). I also have several side gigs ( Single member LLC ) so income goes much higher than IRA will allow.

Can not do HSA as work insurance is low deductible.

What else can I do for retirement? Not able to do IRA due to income. Can’t do more on 401k. Not interested yet in a Solo401k myself.

What is next best step - Would it be a SEP or SIMPLE or am I out of that too because of my income level and contribution to the employer 401k?

Want to reduce tax in this example.

Backdoor Roth IRA for you and your spouse (if applicable).

If you are aiming to maximize tax efficient investing, then Solo 401K is the way to go. A solo 401K is generally much more preferrable to SEP or SIMPLE IRA.

Hope this helps.