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How to Save for Retirement When You Have Student Loans

The debt vs retirement investing question is not a simple either/or. Learn the interest rate decision rule that determines whether to prioritize student loan payoff or retirement investing.

By FlowFund TeamJune 28, 20263 min read

The False Choice Between Student Loans and Retirement

Conventional advice: Pay off all debt before investing. Financial math says otherwise. Whether to prioritize debt payoff or retirement investing depends on interest rates.

The Interest Rate Decision Rule

If student loan interest rate is above 8%: Aggressively pay down debt first (after capturing any employer 401k match). The guaranteed return of eliminating high-interest debt beats the expected return of most investments.

If student loan interest rate is 4-8%: Split contributions. Pay extra on loans AND invest in retirement accounts simultaneously.

If student loan interest rate is below 4%: Minimum loan payments, maximize retirement investing. The expected market return (7%) far exceeds the loan cost.

Capturing the Employer Match (If Applicable)

If you are a freelancer with no employer match: This point is less relevant. But if you work part-time for an employer with a 401k match, always contribute enough to capture the full match. The match is a 50-100% instant return.

The Solo 401(k) and Loan Strategy

For self-employed with student loans below 6%:

  1. Minimum student loan payments
  2. Maximize solo 401(k) contributions (up to $66,000/year)
  3. The tax savings from solo 401(k) can be redirected to additional loan payments

The pre-tax 401(k) contribution reduces your taxable income, reducing taxes, creating more cash flow to pay loans. The tax savings fund part of the debt payoff.

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