Should I Pay Off Debt or Invest? How to Make the Best Financial Decision

The Dilemma: Pay Off Debt or Invest?

This is one of the most common questions in personal finance. You have a 1,000 PLN surplus — should you make extra mortgage payments or buy ETFs? The answer depends on a few specific numbers.

Simple Rule: Compare Interest Rates

If debt interest rate > expected investment return → pay off debt.

If debt interest rate < expected investment return → invest.

Example

• Mortgage: 7.5% (WIBOR + margin)
• Expected S&P 500 ETF return: ~8–10% gross, ~6.5–8% net (after capital gains tax)

This is close — and that's why you need to consider more factors.

When to ALWAYS Pay Off Debt

• Credit cards — 15–25% interest rates. No investment beats this
• Consumer loans — 10–20% interest rates
• Payday loans — APR can exceed 100%
• Debt that keeps you awake — peace of mind has its value

When It's Worth Investing Instead of Paying Extra

• Low-interest debt (e.g., old mortgage below 4%)
• You have IKE/IKZE to maximize — tax relief is guaranteed return
• Employer matches PPK contributions — free money, don't give up
• Debt is "good" — low interest, fixed payments, long term

Calculator: Debt vs Investing

Calculate yourself with these values:

Option A: Extra Loan Payments

• Surplus: 1,000 PLN/month
• Loan interest rate: 7.5%
• Period: 10 years
• Interest savings: ~52,000 PLN

Option B: ETF Investing

• Surplus: 1,000 PLN/month
• Average annual return: 8% gross
• After capital gains tax (19%): ~6.5% net
• Period: 10 years
• Portfolio value: ~168,000 PLN (120,000 contributed + ~48,000 net profit)

In this example, results are similar, but investing provides liquidity — you can sell the portfolio anytime, you can't recover paid interest.

Hybrid Strategy — Best for Most People

You don't have to choose one. Split your surplus:

1. 50% for loan overpayments — reduce risk and interest
2. 30% for investing — build wealth
3. 20% for emergency fund — until you accumulate 6 months of expenses

Debt Avalanche Method

If you have multiple debts:

1. Pay minimums on all debts
2. Direct all surplus to debt with highest interest rate
3. After payoff — move surplus to next debt
4. After paying off everything — all goes to investments

Psychological Factors

Math says one thing, psychology another:

• Debt snowball (paying smallest debt first) gives quick wins and motivation
• Being debt-free provides security that's hard to price
• Financial stress from debt reduces quality of life and earning ability

If debt stresses you — pay it off, even if math says "invest."

How Freenance Can Help

Freenance helps you make this decision based on data:

• See all debts and their interest rates in one place
• Compare scenarios: overpayments vs investing
• Track runway — how many months you'll survive without income
• Monitor debt payoff and portfolio growth simultaneously

👉 Compare scenarios with Freenance — freenance.io