Fixed or variable rate: which choice in 2026 for your mortgage?

Fixed or variable rate in 2026: a key strategic choice

In 2026, the average mortgage rate for a solid profile is around 3.6% fixed over 20 years, while some variable offers start near 2.8–3.2%. Over 20 or 25 years, the choice between fixed vs variable rate can mean a difference of tens of thousands of euros. And it directly affects the core question: buy or rent?

There is no universal answer. The right option depends on:

• the future path of interest rates (unknown),
• how long you plan to keep the property,
• your risk tolerance,
• your savings/investment strategy (ETFs, savings accounts, etc.),
• and the scenario you test in a buy or rent simulator.

This guide focuses on a single simulator parameter: the loan rate (taux_pret), and shows with concrete numbers how it changes the balance between buying and renting.

1. How the mortgage rate works

The loan rate is what you pay the bank. In 2026, typical levels are:

• Fixed rate: about 3.4–3.8% over 20 years.
• Variable (adjustable) rate: usually 0.5–0.8 percentage point lower at the start, but not guaranteed over time.

On top of the nominal rate, other costs must be included in your simulation:

• Borrower insurance rate: roughly 0.25–0.45% of the borrowed capital per year.
• Origination and guarantee fees: from a few hundred to several thousand euros.
• Prepayment penalties: up to 3% of the remaining principal or 6 months of interest (whichever is lower).

In any buy or rent simulator, the taux_pret parameter is crucial: it determines your monthly payment, the interest share, and the overall cost of buying, which you must compare with the cost of renting.

2. Fixed rate: visibility and cost control

2.1. How a fixed rate works

With a fixed rate, the mortgage rate never changes over the life of the loan. Your monthly payment (excluding insurance, property tax, and maintenance) stays the same.

Main advantages:

• Perfect visibility: you know the total interest cost when you sign.
• Budget safety: rate hikes do not affect your monthly payment.
• Easier buy or rent comparison: the simulator can project a very reliable scenario over 15, 20, or 25 years.

Main drawback:

• If rates drop significantly, you are stuck at a higher rate (unless you refinance, which has its own costs).

2.2. Numerical example: 3.6% fixed over 20 years

Assume you buy a property for €300,000 (existing home), financed 100% over 20 years:

• Loan amount: €300,000
• Fixed rate: 3.6%
• Term: 20 years (240 months)

Monthly payment (excluding insurance) ≈ €1,760.
Total interest cost ≈ €122,400.

If we add borrower insurance at 0.35% of capital:

• Insurance cost ≈ €300,000 × 0.35% × 20 years = €21,000
• Total financial cost (interest + insurance) ≈ €143,400

In a buy or rent simulator, this cost is compared to:

• rents paid over 20 years (with annual rent increases indexed to inflation),
• and the performance of your investment rate (for example 4–6% in ETFs) if you stay a tenant.

3. Variable rate: a bet on future interest rates

3.1. How a variable rate works

With a variable rate, the mortgage is linked to an index (Euribor, etc.) plus a fixed margin. In 2026, an offer might look like:

• Variable rate: 3‑month Euribor + 1.2% margin.

If Euribor starts at 1.6%:

• Initial rate = 1.6% + 1.2% = 2.8%

The rate is then adjusted (annually, every 3 years, etc.) up or down. Some contracts include:

• Capped rate: for example, a maximum increase of +1% or +2% above the initial rate.

3.2. Numerical example: 2.8% variable, then rising rates

Let’s reuse the same case: €300,000 over 20 years, but now with:

• Initial variable rate: 2.8%
• Scenario 1 (optimistic): rate stays at 2.8% for 20 years
• Scenario 2 (realistic): rate rises gradually to 4.5% in the first 5 years

Scenario 1 – Rate stays at 2.8%

• Monthly payment ≈ €1,640
• Total interest ≈ €93,600

Savings vs fixed 3.6%: about €28,800 less interest.

Scenario 2 – Rate rises to 4.5%

• For the first years, monthly payment is close to €1,640.
• After adjustments, it can rise to around €1,850–1,900.
• Total interest may exceed €130,000–140,000, becoming more expensive than the 3.6% fixed.

In a simulator, playing with taux_pret and a rising-rate scenario shows this risk clearly.

4. How this affects the buy or rent decision

4.1. Comparing cash flows: monthly payment vs rent

Assume the following:

• Current rent: €1,450/month for a similar property.
• Annual rent increase: 2%.
• If you buy: monthly payment €1,760 (3.6% fixed), property tax €1,200/year, average maintenance 1% of price/year (€3,000/year).

Year 1 cost as a tenant:

• Rent: €1,450 × 12 = €17,400

Year 1 cost as an owner:

• Mortgage: €1,760 × 12 = €21,120
• Property tax: €1,200
• Average maintenance: €3,000
• Total ≈ €25,320

In year 1, owning costs about €7,900 more than renting. But:

• rent increases every year,
• part of the mortgage payment is principal, building your net worth,
• if you stay a tenant, you can invest the savings at your chosen investment rate (say 5%/year).

A buy or rent simulator projects these flows over 20 years to find the break-even point.

4.2. Effect of taux_pret on the break-even point

If the taux_pret falls from 3.6% to 2.8% (as in a good variable-rate scenario), the monthly payment drops from €1,760 to €1,640. The gap vs rent shrinks. Over 20 years:

• at 3.6%, total financial cost (interest + insurance) ≈ €143,400;
• at 2.8%, total financial cost (interest + insurance) ≈ €114,600 (93,600 + 21,000);

The difference of nearly €30,000 can flip the result of your buy or rent comparison: in some scenarios buying wins; in others, renting and investing the difference still comes out ahead.

5. 2026 market context and rate scenarios

5.1. Rate levels in 2026

In 2026, mortgage rates reflect:

• inflation stabilizing around 2–3%,
• central bank policy after sharp hikes in 2022–2023,
• competition between banks trying to grow mortgage volumes.

A 3.6% fixed rate is historically mid-range: higher than 2019–2021 (1–1.5%), lower than the early 2000s (4.5–5.5%). A 2.8–3.0% variable start looks attractive, but only if rates do not climb and stay elevated.

5.2. Three scenarios to test in the simulator

In your buy or rent simulator, you can test three taux_pret scenarios:

• Conservative: you choose a slightly higher but fixed rate (3.6% over 20 years).
• Opportunistic: you pick a variable rate starting at 2.8% with moderate increases (up to 3.8%).
• Stress: a variable rate that reaches 4.5–5% within the first 5 years.

By tweaking the taux_pret parameter, you visualize:

• total loan cost,
• how long it takes before buying becomes more cost‑effective than renting,
• the impact if you sell after 7–10 years, before the end of the mortgage.

6. Investor profile: when can a variable rate make sense?

The fixed vs variable decision also depends on your investment profile and time horizon.

6.1. If you plan to sell early (5–8 years)

If you expect to sell after 5–8 years:

• a large share of your early payments is interest,
• you are more exposed to short‑term rate spikes,
• your monthly budget is more vulnerable to sudden increases.

In this case, a variable rate might be attractive only if:

• the initial discount vs fixed is significant (around 1 percentage point),
• you have emergency savings to absorb higher payments,
• you monitor rates and are ready to refinance if needed.

6.2. If you are a disciplined financial investor

A disciplined investor able to allocate regularly at a solid investment rate (4–6%/year) might reason like this:

• choose a fixed rate to lock in housing costs,
• or opt for a variable rate, benefit from lower payments at the start, and invest the difference in the markets.

In a favorable scenario (variable rates stay low, investments perform well), the combination variable + investing can outperform a fixed rate by a wide margin. But it is not guaranteed. That is why it is useful to simulate several paths in your buy or rent comparison.

7. Specific risks to watch with variable rates

Before choosing a variable rate in 2026, check:

• The cap: does your contract limit the rate increase to +1% or +2%?
• Adjustment frequency: yearly, quarterly? The more frequent, the more your payment can change.
• Payment structure: with strong hikes, some banks extend the term instead of sharply raising the payment, which increases total cost.
• Prepayment penalties: variable loans can be more flexible, but conditions vary.

Integrate these features into your taux_pret assumptions when you build a "pessimistic" scenario in the simulator.

8. Using a simulator to decide in 2026

A tool like buy-or-rent.net lets you:

• enter a fixed taux_pret (3.6%) and then a sequence of variable taux_pret values (for example 2.8%, 3.5%, 4.2% over time),
• project rent with annual increases,
• test different investment rates for the money saved if you rent,
• factor in property tax, property tax revaluation, maintenance, borrower insurance, and more.

Comparing several scenarios shows that the fixed vs variable rate choice does not have the same impact if:

• you keep the property for 5, 10, or 25 years,
• you invest surplus cash or let it sit in a low‑yield account,
• you are comfortable or uncomfortable with payment volatility.

Important: these simulations are educational tools, not personalized financial advice. Your final decision depends on your own situation and, if needed, professional guidance.

Conclusion: fixed or variable in 2026 – it depends on you

In 2026, with fixed rates around 3.6% and variable starting near 2.8–3.0%, the gap is large enough to reshape the outcome of a buy or rent analysis. A fixed rate gives full visibility and simplifies planning. A variable rate is a calculated risk on future rates and requires genuine risk tolerance.

The right choice depends on your projects, horizon, savings capacity, and your comfort with uncertainty. Use hard numbers, adjust the taux_pret parameter, and test multiple scenarios to compare options logically rather than emotionally.

This content is for information only and does not constitute personalized financial advice. To see how a fixed or variable rate would affect your own project and your buy or rent decision, rely on data: Simulate your situation on buy-or-rent.net.