Freelance Retirement Savings: SEP IRA vs Solo 401(k)

The complete guide to choosing the right retirement plan, maximizing tax deductions, and building long-term wealth as a freelancer.

No employer match. No automatic payroll deductions. No HR department setting up your 401(k). As a freelancer, retirement savings is entirely on you — and that's actually an advantage. Self-employed individuals have access to retirement plans with higher contribution limits than most traditional employees get.

The challenge isn't access. It's knowing which plan to choose and actually setting money aside from irregular income. This guide breaks down every option, compares them side by side, and gives you a concrete system for saving consistently.

Retirement Plan Options at a Glance

Plan2026 LimitBest ForSetup Complexity
Traditional IRA$7,000 ($8,000 if 50+)Starting out, low incomeVery easy
Roth IRA$7,000 ($8,000 if 50+)Younger freelancers, lower tax bracket nowVery easy
SEP IRAUp to $70,000High earners, simple setupEasy
Solo 401(k)Up to $70,000 ($77,500 if 50+)Maximum flexibility & contributionsModerate
SIMPLE IRA$16,500 ($20,000 if 50+)Freelancers with employeesModerate
Key insight: You can combine plans. For example, you can contribute to both a Roth IRA ($7,000) and a SEP IRA (up to $70,000) in the same year, potentially sheltering $77,000 from taxes.

Traditional & Roth IRA: The Starting Point

If you're just starting freelancing or earning under $60,000, a Traditional or Roth IRA is the simplest first step. You can open one at any major brokerage (Vanguard, Fidelity, Schwab) in about 15 minutes.

Traditional IRA

Tax benefit: Contributions are tax-deductible now. You pay taxes when you withdraw in retirement.

Best if: You're in a higher tax bracket now than you expect to be in retirement. The deduction reduces your current tax bill.

Roth IRA

Tax benefit: No deduction now, but all growth and withdrawals are tax-free in retirement.

Best if: You're in a lower tax bracket now (early career) or you want tax-free income in retirement. Also offers more flexibility — you can withdraw contributions (not earnings) at any time without penalty.

Income limits for Roth IRA (2026): Full contribution if modified AGI is under $150,000 (single) or $236,000 (married filing jointly). Phase-out applies above these amounts.

SEP IRA: The Simple High-Contribution Plan

The SEP (Simplified Employee Pension) IRA is the most popular retirement plan for solo freelancers, and for good reason. It combines high contribution limits with extremely simple administration.

How It Works

You contribute as the "employer" — up to 25% of your net self-employment income, with a maximum of $70,000 for 2026. There are no employee contributions, no annual filing requirements, and no plan documents to maintain beyond the initial setup form.

SEP IRA Contribution Formula:

Net SE Income = Gross Income - Business Expenses
Adjusted SE Income = Net SE Income × 0.9235 (deduct 1/2 SE tax)
Max Contribution = Adjusted SE Income × 0.25

Example ($100,000 net SE income):
$100,000 × 0.9235 = $92,350
$92,350 × 0.25 = $23,087 max SEP contribution

Effective rate: ~20.5% of net self-employment income

SEP IRA Pros

Extremely easy to set up and maintain — no annual IRS filings required. High contribution limit ($70,000 cap). Flexible contributions — you can vary the amount each year or skip years entirely. Contributions are tax-deductible, reducing your current tax bill. Deadline to contribute: your tax filing deadline, including extensions (typically October 15).

SEP IRA Cons

No Roth (after-tax) option — all contributions are pre-tax only. No catch-up contributions for those 50 and older. If you have employees, you must contribute the same percentage for them. No loan provision — you can't borrow from the account.

Solo 401(k): Maximum Flexibility

The Solo 401(k) — also called an Individual 401(k) — is the most powerful retirement plan for freelancers, but it comes with slightly more complexity.

How It Works

You make contributions in two capacities: as the "employee" (up to $23,500 for 2026, or $31,000 if 50+) and as the "employer" (up to 25% of net SE income). The combined limit is $70,000 ($77,500 if 50+).

Solo 401(k) Contribution Formula:

Employee contribution: up to $23,500 (or $31,000 if 50+)
Employer contribution: Net SE Income × 0.9235 × 0.25
Total = Employee + Employer (max $70,000 or $77,500 if 50+)

Example ($100,000 net SE income):
Employee: $23,500
Employer: $100,000 × 0.9235 × 0.25 = $23,087
Total: $46,587

Solo 401(k) Pros

Highest total contribution potential. Roth option available (employee portion can be designated Roth). Loan provision — borrow up to $50,000 or 50% of balance. Catch-up contributions for age 50+ ($7,500 extra). At lower income levels, allows higher contributions than SEP IRA due to the employee contribution component.

Solo 401(k) Cons

Must file Form 5500-EZ annually once assets exceed $250,000. Slightly more complex setup (plan document, EIN for the plan). Must be established by December 31 of the tax year (unlike SEP IRA which can be set up until the tax filing deadline). Not available if you have full-time employees (other than a spouse).

SEP IRA vs Solo 401(k): Head-to-Head

FeatureSEP IRASolo 401(k)
Max contribution (under 50)$70,000$70,000
Max contribution (50+)$70,000$77,500
At $50K income, max contribution~$10,294~$33,794
At $100K income, max contribution~$23,087~$46,587
Roth optionNoYes
Loan provisionNoYes
Setup deadlineTax filing deadlineDecember 31
Annual IRS filingNoneForm 5500-EZ if >$250K
Can have employeesYes (must contribute for them)No (solo or with spouse only)
Bottom line: If your net SE income is under $75,000, the Solo 401(k) usually lets you save more because of the employee contribution. If your income is above $200,000 and you want maximum simplicity, the SEP IRA is often the better choice. If you want a Roth option, Solo 401(k) is the only way.

How Much Should You Save?

The standard advice is 15-20% of your gross income, but as a freelancer with no employer match, you may want to aim higher. Here's a practical framework based on age:

Your AgeTarget Savings RateOn $80K Income
20s15% minimum$12,000/year ($1,000/month)
30s20%$16,000/year ($1,333/month)
40s25%+$20,000/year ($1,667/month)
50s30%+ (use catch-up)$24,000/year ($2,000/month)

Automating Retirement Savings with Irregular Income

The biggest obstacle for freelancers isn't choosing a plan — it's actually saving consistently when income fluctuates. Here's a system that works:

The Percentage-of-Revenue Method

Every time you receive payment from a client, immediately transfer a fixed percentage to your retirement account (or a dedicated savings account that you sweep to your retirement plan quarterly).

Excel Retirement Savings Tracker:

Column A: Payment Date
Column B: Client Name
Column C: Payment Amount
Column D: Retirement % (e.g., 20%)
Column E: =C2*D2 (Amount to transfer)
Column F: Running total: =SUM($E$2:E2)
Column G: Remaining to annual goal: =AnnualTarget-F2

The Quarterly Sweep

If transferring per payment feels like too much overhead, batch your contributions quarterly. This aligns well with estimated tax payments — set aside retirement savings and tax payments at the same time.

Quarterly timeline: Q1 by April 15, Q2 by June 15, Q3 by September 15, Q4 by January 15 of the following year.

Track Income, Taxes, and Retirement in One Place

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Tax Benefits: How Much You Actually Save

Retirement contributions are one of the most powerful tax deductions available to freelancers. Here's the real-world impact:

Tax Savings Example:

Net SE Income: $100,000
SEP IRA Contribution: $23,087
Federal Tax Bracket: 24%
State Tax Rate: 5%

Federal tax saved: $23,087 × 0.24 = $5,541
State tax saved: $23,087 × 0.05 = $1,154
Total tax saved: $6,695

Effective cost of $23,087 retirement contribution: $16,392

In other words, a $23,087 contribution only "costs" you $16,392 in reduced take-home pay. The rest comes from money you would have paid in taxes.

Getting Started: Step-by-Step

Step 1: Choose your plan. If your income is under $75K, start with a Solo 401(k) for maximum contribution flexibility. If you want simplicity above all else, go with a SEP IRA.

Step 2: Open the account. Vanguard, Fidelity, and Schwab all offer free SEP IRA and Solo 401(k) accounts with no account minimums. The application takes 15-30 minutes online.

Step 3: Choose your investments. A target-date fund (based on your expected retirement year) is the simplest set-and-forget option. Or use a simple three-fund portfolio: US stock index, international stock index, and bond index.

Step 4: Automate contributions. Set up percentage-based transfers from your business account using the system described above. Even 10% is better than nothing.

Step 5: Track and adjust. Review your contributions quarterly alongside your tax estimates. Increase your savings rate whenever your income grows.

Important deadlines: Solo 401(k) plans must be established by December 31 of the tax year. SEP IRA plans can be established and funded up to your tax filing deadline (including extensions). Don't wait until year-end — start now and adjust later.

Get Your Freelance Finances Organized First

Before you can save for retirement, you need to know what you're earning and spending. Start with our free Budget Starter template to get a clear picture of your cash flow.

Download Free Budget Starter