Self‑Employed Retirement Calculator — Solo 401k vs. SEP IRA

Self‑Employed Retirement Calculator

The Self-Employed Retirement Calculator for May 2026 is a critical tool for navigating the “Higher-for-Longer” era. As of May 15, 2026, the S&P 500 is trading near record highs of 7,501, and headline inflation has jumped to 3.8%.

While the One Big Beautiful Bill Act (OBBBA) has permanently extended the 20% QBI Deduction, choosing between a Solo 401k and a SEP IRA depends on your age, income, and desire for tax diversification.

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1. 2026 Contribution Limits & Comparison

For the 2026 tax year, the IRS has increased contribution caps to account for persistent inflation.

Feature	Solo 401k	SEP IRA
Total Limit (under 50)	$72,000	$72,000
Catch-Up (Age 50+)	+$8,000 ($80,000 total)	None
Catch-Up (Age 60-63)	+$11,250 ($83,250 total)	None
Contribution Source	Employee + Employer	Employer Only
Roth Option	Yes (Employee + Employer)	Limited (Varies by provider)
Loan Provision	Yes (Up to $50,000)	No

How-To Guide

• Input Annual Net Profit: Enter your business earnings after all expenses (Schedule C or K-1 income).
• Select Your Age: Input your age to trigger the 2026 catch-up limits ($8,000 for age 50+ or the new $11,250 “Super Catch-up” for ages 60–63).
• Compare Contribution Buckets:
  • Solo 401k: Combines your $24,500 employee deferral with up to 25% employer profit-sharing.
  • SEP IRA: Limited strictly to a percentage of your profit (typically ~20% for the self-employed).
• Audit the Loan & Roth Features: Check if you need the ability to borrow from your plan or make after-tax Roth contributions.
• Review the Verdict: View the Maximum Total Contribution for each plan in Electric Lime Green.

 

 

 

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Plain English: This result indicates your net efficiency after 2026 fiscal variables—higher values represent a stronger “Safety Margin” for your Business Legacy and increased liquidity for The Signal Vault.

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Understanding the Basics

• The ‘Two-Bucket’ Advantage: A Solo 401k allows you to contribute as both employee and employer. This means you can often hit the $72,000 (or $80,000+ with catch-ups) limit at a much lower income level than a SEP IRA, which requires a higher salary to max out.
• SECURE 2.0 Upgrades: In 2026, Solo 401ks offer superior “Super Catch-up” headroom for those in the 60–63 age bracket. This tool applies these specific 2026 rules to your Hybrid App revenue.
• Administrative Overhead: While the Solo 401k offers more Electric Lime Green growth, it requires a Form 5500-EZ filing once your plan assets exceed $250,000. The SEP IRA remains the “No-Paperwork” king for busy developers.

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Calculate the Growth of Your Tax-Deferred Capital

“A contribution is just the beginning. Use our Simple Interest Calculator Online to see how the interest earned on your tax-deductible retirement funds can exponentially grow your The Signal Vault without the ‘Tax Drag’ of a standard brokerage account.”

Benchmark Your Contributions Against Market Standards

“To maximize your retirement buckets, you need to maximize your income. Use our Skill-Based Salary Calculator USA to ensure your specialized App and AI prompting skills are commanding the 2026 market rates required to hit the contribution ceiling.”

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Frequently Asked Questions

1. Why is “Ghosting” significantly more expensive in May 2026 than in previous years? With headline inflation at 3.8% and energy prices up 17.9%, every wasted sales hour or recruiter interview is more expensive. In 2026, the average cost-per-hire has jumped to $5,475 for non-executive roles. A “late-stage ghost” after a final interview can cost your organization $4,000–$9,000 per month in lost productivity while the seat remains empty.

2. Is there a tax deduction for revenue lost to ghosting under the OBBBA? The One Big Beautiful Bill Act (OBBBA) doesn’t allow you to deduct “hypothetical” revenue that never arrived. However, it does provide:

• 100% Bonus Depreciation: This helps you write off the cost of AI software or CRM tools used to combat ghosting.
• W-2 Reporting Credits: If you use employees to build “Anti-Ghosting” automation, certain R&D credits under OBBBA may apply to their labor costs.

3. What is a “Ghost Job” and how does it affect my industry data? In May 2026, roughly 27.4% of US job listings are “Ghost Jobs”—postings with no immediate intent to hire, used by companies to build talent pools or project a “growth image.” This has broken candidate trust, leading to a “Bidirectional Ghosting Crisis” where 53% of candidates report being ghosted by employers, and 41% of employers report being ghosted by candidates