Should I Buy a House with Cash? Cash vs Mortgage Analysis

The Dilemma: I Have Cash — What to Do?

You have 500,000 PLN and see a house at that price. Intuition says: buy with cash, don't pay interest to the bank. But financially, it's not that simple. The key concept is opportunity cost — what you could do with that money instead of freezing it in real estate.

Cash Purchase — Advantages

No Interest Payments

With a mortgage of 400,000 PLN at 7% interest for 25 years — you'll pay about 450,000 PLN in interest alone. Cash saves this amount.

Faster Transaction

No loan procedure means closing in 2–4 weeks instead of 2–3 months. In a competitive market, this is a huge advantage.

Lower Notary Costs

Without a mortgage, notary fees are lower (no mortgage registration in land registry, no mortgage stamp duty).

Peace of Mind

No monthly obligation for 25–30 years. Lose your job? No bank will take your home.

Cash Purchase — Disadvantages

Opportunity Cost

500,000 PLN invested in a global ETF portfolio at 7% average annual return equals about 2,700,000 PLN after 25 years. That's money you "won't earn" by buying with cash.

No Financial Leverage

A mortgage is leverage — you put down 100,000 PLN and control a 500,000 PLN asset. If the house appreciates 10%, you earn 50,000 PLN on your 100,000 PLN investment — 50% return.

With cash, the same appreciation is "only" a 10% return.

Loss of Liquidity

500,000 PLN in a house is 500,000 PLN you can't use quickly. Real estate sales take months. In emergencies, cash in the bank is invaluable.

When Does Cash Make Sense?

Compromise Solution

You don't have to choose 100% of one option:

1. Make larger down payment (50–70%) — lower interest, less risk, but preserve some cash for investments
2. Buy with cash, then get mortgage — reverse order, but gives access to cheaper capital (than consumer loans) for investments
3. Overpay mortgage — start with mortgage, when rates drop below investment returns, switch to investing instead of overpayments

How to Calculate — Simple Formula

If mortgage rate < expected investment return → mortgage pays off.

Example (2026):

• Mortgage rate: 7.5%
• Expected ETF return: 7% (long-term)
• 7.5% > 7% → cash wins (at current rates)

But note: mortgage rate is certain, investment return isn't. Consider your risk tolerance.

How Freenance Can Help

Freenance lets you simulate both scenarios — cash purchase vs. mortgage + investing surplus. You see projected net worth in both variants over years. Additionally, if you already have a mortgage, Freenance tracks its payoff and shows how overpayments affect total cost.

👉 Simulate home purchase with Freenance — freenance.io