Solo 401(k) Contribution Planning Guide
Estimate self-employed Solo 401(k) contribution scenarios, compare pre-tax and Roth choices, and build a setup checklist with CPA questions.
Prompt Template
Act as a financial planning educator for self-employed professionals. Create a Solo 401(k) contribution planning guide for [person/business] for tax year [year]. Business type/entity: [sole proprietor/LLC/S-corp/etc.] Age: [age] Estimated net self-employment income or W-2 wages from the business: [income] Existing retirement contributions this year: [401k/IRA/SEP/etc.] Employees other than owner/spouse: [yes/no] Cash flow available for retirement savings: [monthly/annual amount] Pre-tax vs Roth preference: [preference/unknown] Tax bracket estimate: [estimate if known] CPA/payroll setup: [details] Provide: 1. **Eligibility check** — owner-only/spouse-only rule and employee caveats 2. **Contribution estimate** — employee deferral, employer contribution, catch-up if applicable, and total range 3. **Pre-tax vs Roth decision framework** 4. **Cash-flow funding schedule** — monthly/quarterly/year-end options 5. **Setup checklist** — provider selection, plan documents, payroll coordination, bank transfers 6. **Deadline checklist** — establishment, employee deferral election, employer contribution timing 7. **Tax reporting notes** — what to confirm with a CPA 8. **Scenario table** — conservative, target, and max contribution cases 9. **Questions for CPA/advisor** Include a clear disclaimer that contribution limits and calculations depend on tax law, entity type, and compensation details, so the user should verify with a qualified tax professional.
Example Output
Eligibility Check
Assuming the business has no eligible employees other than the owner, a Solo 401(k) may be an option. If part-time employees meet eligibility rules, confirm plan requirements with a benefits professional before proceeding.
Scenario Table
| Scenario | Employee Deferral | Employer Contribution | Total | Notes |
|---|---:|---:|---:|---|
| Conservative | $12,000 | $3,000 | $15,000 | Fits current cash reserve goal |
| Target | $18,000 | $6,000 | $24,000 | Requires quarterly transfers |
| Max estimate | Verify with CPA | Verify with CPA | TBD | Depends on final net income and annual IRS limits |
CPA Questions
1. Based on my entity type, what compensation number should employer contribution be calculated from?
2. Should I use Roth, pre-tax, or split contributions this year?
3. What plan setup deadline applies for tax year 2026?
Tips for Best Results
- 💡Provide entity type and compensation details; Solo 401(k) math changes by structure.
- 💡Ask for scenarios instead of one exact answer if income is variable.
- 💡Have the model generate CPA questions so you can verify before moving money.
- 💡Do not treat the output as tax advice; contribution limits and deadlines change.
Frequently Asked Questions
What is the Solo 401(k) Contribution Planning Guide prompt?
Estimate self-employed Solo 401(k) contribution scenarios, compare pre-tax and Roth choices, and build a setup checklist with CPA questions. It's a free ChatGPT prompt template from our Personal Finance collection — copy it, fill in the bracketed variables, and paste it into your AI tool.
Which AI tools work with this prompt?
It's written and tested for ChatGPT, Claude and Gemini. Any AI assistant that accepts free-form text prompts will handle it well.
How do I customize this ChatGPT prompt?
Replace the bracketed variables — such as [person/business], [year], [sole proprietor/LLC/S-corp/etc.] — with your own details before running it. Provide entity type and compensation details; Solo 401(k) math changes by structure.
Is this prompt free to use?
Yes. Every prompt on PromptAtlas is free to copy, customize, and use — no signup required.
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