Case Study: A 1099 Consultant's Solo 401(k) & QBI Setup After a Messy First Year
Client snapshot (illustrative composite)
- Business
- Independent IT systems consultant, multiple corporate clients
- First-year net income
- ~$195,000, no retirement account, underpaid estimates
- Structure
- Sole proprietorship, no S-corp, no quarterly plan
The situation
James left a corporate IT role to consult independently and had a strong first year — but he'd never set up quarterly estimated payments, had no retirement account at all outside an old employer 401(k) he'd stopped contributing to, and got hit with both an underpayment penalty and a QBI deduction that was smaller than it should have been because his numbers weren't optimized going in.
What we did
- Set up quarterly estimated payments under the safe harbor rule to eliminate underpayment penalties going forward
- Elected S-corp status once his consistent income level supported it, and set a reasonable salary against IT consulting benchmarks
- Opened a Solo 401(k) and began maximizing both employee and employer contributions, which also reduced income tested against QBI phase-out thresholds
- Confirmed his IT systems consulting work fell outside the SSTB categories that would have phased out his QBI deduction at his income level
The numbers
James's illustrative year-two correction
The result
None of this required aggressive planning — it required basic infrastructure that simply hadn't been set up yet: an entity structure that matched his actual income, a retirement account, and a quarterly payment plan. The first year's problems were entirely avoidable with structure that should have been in place from month one of going independent.
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