Rate hikes: how do they impact your real estate buying power?

Rate hikes: why your buying power falls faster than prices

Between 2021 and 2024, average mortgage rates in Europe moved from around 1% to roughly 3.6%. This rate increase has a mechanical, often brutal impact on your buying power, even if your salary and savings haven’t changed. Understanding that mechanism is essential before deciding whether it’s better to buy or rent.

On buy-or-rent.net, our simulator uses a key parameter: the loan rate (taux_pret). A change of just a few tenths of a percent can turn an affordable project into something out of reach.

1. The loan rate: the main driver of your monthly payment

For a standard amortizing mortgage, your monthly payment depends on four elements:

• the loan amount (after down payment);
• the term (20, 25 years, etc.);
• the loan rate (annual nominal rate);
• the borrower insurance rate (often 0.25–0.45% of the loan amount per year).

The monthly payment formula (without insurance) is:

Payment = C × [ (i / 12) / (1 - (1 + i / 12)^(-n)) ]

where C is the principal, i the annual rate (e.g. 0.036 for 3.6%) and n the number of months (e.g. 300 for 25 years).

In the buy-or-rent.net simulator, this is handled automatically via the taux_pret parameter. Changing this rate instantly shows how your monthly payment – and therefore your buying power – is affected.

2. Numeric example: same monthly budget, lower buying power

Reference scenario: low rate at 1.2%

Assume you can allocate €1,200 per month to your mortgage (excluding insurance) over 25 years.

• Loan rate: 1.2% per year
• Term: 25 years (300 months)

Reversing the formula, your borrowing capacity is about €282,000. With a €30,000 down payment, you can target a property around:

€312,000 purchase price.

Current scenario: rate at 3.6%

Now keep the same income and the same maximum monthly effort of €1,200.

• Loan rate: 3.6%
• Term: 25 years

Your borrowing capacity falls to roughly €220,000. With the same €30,000 down payment, your total budget becomes:

€250,000 purchase price.

Impact of the rate increase:

• Buying power before: €312,000
• Buying power after: €250,000
• Loss: €62,000, i.e. about –20% for the same monthly payment.

This is exactly the gap the buy or rent simulator highlights when you adjust the taux_pret parameter.

3. Same property, different rate: a monthly payment that jumps

Now invert the logic: you want to keep the same property, not your monthly cap. Let’s say you buy a €300,000 home with a €30,000 down payment, so you borrow €270,000 over 25 years.

At 1.2% rate

• Principal: €270,000
• Rate: 1.2%
• Term: 25 years

Monthly payment excluding insurance: about €1,040.

At 3.6% rate

• Principal: €270,000
• Rate: 3.6%
• Term: 25 years

Monthly payment excluding insurance: about €1,370.

Extra monthly cost: roughly +€330, or around +32% for the exact same property.

Over 25 years, the difference in total interest is huge:

• At 1.2%: total interest ≈ €42,000;
• At 3.6%: total interest ≈ €120,000;
• Extra ≈ €78,000 in interest over the life of the loan.

This difference is driven entirely by the loan rate, modeled in the simulator as taux_pret.

4. Rate + insurance: the real cost of your mortgage

Many households focus only on the loan rate, but borrower insurance adds a non‑trivial cost. In 2024, a typical insurance rate is around 0.25–0.45% of the initial principal per year.

Example on €270,000

• Principal: €270,000
• Loan rate: 3.6%
• Insurance rate: 0.30% (on initial principal)
• Term: 25 years

Yearly insurance: 270,000 × 0.30% = €810, i.e. about €68 / month.

Your total monthly cost becomes:

• Loan payment: ≈ €1,370
• Insurance: ≈ €68
• Total: ≈ €1,438 / month

The buy or rent simulator lets you input both the taux_pret and the insurance rate so you see your all‑in monthly cost and check whether it fits under the usual 35% debt‑to‑income cap.

5. Rate increases and the buy or rent decision

A rate hike doesn’t just make buying more expensive. It also changes the balance between buying and renting, because money not used for down payment or mortgage payments can be invested elsewhere.

Simplified comparison: owner vs renter‑investor

Typical profile:

• Net income: €3,500 / month
• Maximum housing effort: €1,200 / month
• Available down payment: €40,000

Option 1: buy with 3.6% rate

• Total budget: ~€260,000 (40,000 down + 220,000 loan over 25 years)
• Loan + insurance monthly: ~€1,250
• Additional owner costs: notary fees, property tax, maintenance…

Your buying power is directly constrained by the loan rate. With a lower rate, you’d afford a more expensive property for the same effort.

Option 2: rent + invest

• Rent: €900 / month (indexed to inflation or rent index, so it can rise yearly)
• Investment capacity: €300 / month + the unused €40,000 down payment
• Investment return assumption: 4%/year (e.g. diversified ETFs, modeled with the simulator’s investment rate parameter)

After 25 years:

• The owner will (in principle) own a paid‑off property, but with a higher interest cost due to rate increases.
• The renter‑investor will have a financial portfolio whose size depends on the investment rate and the path of rents.

There is no universal answer to whether it’s better to buy or rent. It depends on your time horizon, local market, inflation, rent growth and achievable investment returns. The buy-or-rent.net simulator is designed to compare these scenarios objectively.

6. How to react to rate hikes to protect your buying power

Without giving individual financial advice, we can list several theoretical levers to limit the impact of higher rates on buying power:

1) Extend the loan term

Moving from 20 to 25 years cuts the monthly payment, helping you maintain a higher purchase budget. But:

• the total interest cost increases sharply;
• you pay interest for longer;
• your future flexibility (sale, refinancing) may shrink.

Example on €220,000 at 3.6%:

• Over 20 years: monthly ≈ €1,280, total interest ≈ €87,000;
• Over 25 years: monthly ≈ €1,120, total interest ≈ €116,000;
• Monthly saving ≈ €160, but +€29,000 interest overall.

2) Increase your down payment

A larger down payment cuts the loan amount and therefore the impact of the loan rate. But it also reduces the cash you keep for:

• emergencies;
• renovations and maintenance;
• financial investments (ETFs, savings, etc.).

On buy-or-rent.net, you can test different down payment levels to see from which point buying becomes more or less attractive than renting.

3) Adjust property type or location

If rate increases cut your buying power by 20%, you can:

• consider a smaller property;
• move to a cheaper area;
• accept a home requiring work (with a renovation budget you must add to the total project cost).

The question isn’t only “buy or rent”, but “which size/location/price mix still makes sense given today’s taux_pret and your situation”.

7. Long‑term risks of higher rates

Beyond the monthly payment, higher rates also change:

• the share of interest in each installment: the higher the rate, the more you pay in interest at the start;
• the risk of selling at a loss if prices stagnate or fall;
• your financial flexibility: high payments reduce your ability to save or invest in parallel.

In many European markets, most mortgages are fixed‑rate, which protects you from future rate hikes once the loan is signed. However, if rates fall later on, refinancing may be attractive, but:

• you have to consider prepayment penalties (often up to 3% of the remaining principal or six months of interest);
• plus new fees (origination, guarantees, possibly notary).

The buy-or-rent.net simulator doesn’t replace tailored advice, but it does let you explore different rate increase or decrease scenarios and see how they affect your buying power.

8. With rates at 3.6%, what should you look at before you buy or rent?

With mortgage rates around 3.6%, it’s useful to examine at least three dimensions before you choose to buy or rent:

1) How long you plan to keep the property

The longer you stay, the more you amortize:

• notary fees (roughly 7–8% on existing homes, 2–3% on new builds);
• agency fees (typically 3–5%);
• other transaction costs.

If you sell after just 4–5 years, the combination of high rates and high entry costs can make buying clearly less attractive than renting + investing.

2) Local market and rent dynamics

In some cities, property tax grows faster than rents, changing the math. In others, rents are rising fast, which can make buying more attractive in the long run even with a higher taux_pret.

3) Alternative return on your savings

If you can invest your down payment and monthly savings at a return close to the loan rate, the buy or rent trade‑off becomes very subtle. The buy-or-rent.net tool compares:

• the owner’s net wealth (property value – remaining mortgage);
• the renter‑investor’s net wealth (financial assets – rents paid).

Conclusion: rate increases mean you must redo the math

Rate hikes have a direct, powerful impact on your buying power: for the same monthly payment, you may now afford a home that’s 15–25% cheaper than in the era of ultra‑low rates. This isn’t inherently good or bad, but it forces you to revisit the question: in this new context, which is the better compromise for you, buy or rent?

The answer depends on your personal situation, time horizon, risk tolerance and local market. This article is for information only and is not personalized financial advice.

To measure precisely how the taux_pret affects your project, test several rate increase scenarios and compare buy or rent objectively using our dedicated simulator.

Simulate your situation on buy-or-rent.net