Compare the wealth each option leaves you with after the same period, using the same starting cash and monthly budget. Rent and a mortgage payment alone leave out buying costs, property expenses, and the money you could invest.
Start with the same cash and a comparable home
A fair comparison starts with a home you could realistically rent or buy: similar size, condition, and location. Comparing a small rental with a larger home makes the housing upgrade look like an investment result.
Suppose the home costs €300,000 and rents for €1,200 a month. A 20% down payment is €60,000. Buying fees at 6% add €18,000, so the buyer needs €78,000 upfront. The renting option starts with the same €78,000 and invests it. The buyer's initial equity is €60,000 because buying costs do not add to the home's assumed market value.
This is opportunity cost: money committed to one choice cannot simultaneously fund the other. Keep an emergency reserve outside both options rather than treating every euro you have as available for a deposit or stock investment.
Account for the whole monthly budget
The mortgage has two parts. Interest pays for borrowing; principal reduces the loan. Both leave your bank account, but only principal increases your ownership of the home.
| Item | Buying | Renting |
|---|---|---|
| Mortgage interest | €700.00 | — |
| Mortgage principal | €377.71 | — |
| Property tax, maintenance, insurance | €325.00 | Included in the assumed rent |
| Rent | — | €1,200.00 |
| Housing cash outflow | €1,402.71 | €1,200.00 |
| Money invested to equalize budgets | €0.00 | €202.71 |
In this first month, renting leaves about €203 to invest on top of the initial portfolio. That difference changes as rent, property expenses, and the loan balance change. If buying becomes cheaper later, the buyer invests the difference instead.
Actual ownership expenses can include building charges and other costs beyond this illustration. The US Consumer Financial Protection Bureau provides a useful list of housing budget components; use local quotes and rules for their amounts.
Compare what you own at the end
For the buyer, count home value minus the outstanding mortgage, plus any investments. For the renter, count the investment portfolio. Comparing a home's gross value with a renter's savings balance would ignore the buyer's remaining debt.
With the assumptions below, keeping the assets after 30 years leaves the buyer with €612,800 and the renter with €359,300, rounded to the nearest €100. This is one scenario, not a forecast or a general verdict on buying.
If you need spendable cash, switch to selling everything. That deducts the home's selling costs and whatever capital gains tax rates you enter. Equity and cash after a sale answer different questions.
All assumptions for this example
A hypothetical €300,000 home, €1,200 monthly rent, 20% down payment, a 3.5% fixed mortgage for 30 years, and buying costs of 6%. Annual property costs are 0.2% tax, 1% maintenance, and 0.1% insurance, calculated on the home's changing value. Home value and rent each grow 2% annually. Stocks return 5% before a 0.3% annual fee. No extra monthly savings. Capital gains taxes are set to zero to isolate the comparison; this is not a statement about local tax rules. The savings alternative uses 2% interest and zero interest tax.
These results keep the home and investments, so selling costs and capital gains tax are not deducted. Amounts are nominal, without inflation adjustment. Our calculator's headline result is after 30 years; earlier years appear in the chart. Rates are held constant, and actual returns, expenses, and tax treatment will differ.
Test assumptions before choosing
Rerun the comparison with slower home growth, a lower stock return, higher maintenance, and a higher mortgage rate. Change one input at a time first so you can see what drives the result, then try combinations that could occur together.
A steady annual investment return is a simplifying assumption. Stocks can fall sharply, and a home can lose value. The SEC's discussion of time horizon and risk tolerance explains why the date you need your money matters.
The calculator also assumes that whichever path is cheaper actually invests the difference. If you expect to spend those savings, the projected portfolio is not your likely outcome.
Finally, weigh affordability, flexibility, and whether you want responsibility for repairs. A higher modeled net worth does not pay an unexpected bill today or decide which home suits your life.
Published by Rent vs Buy. Prepared with AI assistance, with primary sources linked in the text. Worked numbers are checked with automated tests against our calculator models or the stated formulas. Local fees and tax rules vary; these examples are not personalized advice.