Zero Rate Loan 2026: PTZ Rules and Loan Rate Simulation

Zero Rate Loan 2026: why the loan rate matters more than ever

The French PTZ 2026 (prêt à taux zéro 2026) is a government-backed zero rate loan designed to help first-time buyers finance part of their main home at a 0% nominal interest rate. In a market where standard mortgage rates are around 3.6% over 20 years, this can radically change the buy or rent calculation.

However, the PTZ only covers part of the purchase price and comes with income, location and property-type conditions. To really understand whether it helps you, you need to put it side by side with a renting scenario and simulate your effective loan rate over the whole project.

Important: all figures below are generic and educational. They are not personal financial advice. Your case may be very different. Simulate your situation on buy-or-rent.net to see numbers tailored to your profile.

1. How the French PTZ zero rate loan works

The PTZ is an additional mortgage: it does not replace your main loan, it complements it. The key benefit is that you borrow a share of the purchase price at 0% interest (excluding insurance).

1.1. Basic mechanics

• Interest rate on PTZ: 0% (no interest, but you still pay insurance).
• Amount: a fraction of the property price, often between 20% and 40% in previous schemes, subject to caps depending on the zone (A, B1, B2, C) and household size.
• Term: typically 20–25 years, with a possible grace period where you don’t repay the PTZ immediately.
• Means-tested: your income must stay below a ceiling depending on the zone and the number of people in the household.
• Usage: main residence, with a minimum occupancy period (often 6 years).

1.2. The link with your loan rate (taux_pret)

Our simulator uses a key parameter: taux_pret, i.e. the interest rate on your standard mortgage. For 2026, a reasonable benchmark is a fixed rate around 3.6% over 20 years (excluding insurance), although your actual rate will depend on your profile.

With a PTZ zero rate loan, you don’t pay 3.6% on the whole debt. Part of it is at 0%, the rest at 3.6%. This reduces your weighted average cost of debt. That average rate is what you should compare with the investment rate you could get by renting and investing your savings instead (ETFs, savings accounts, etc.). This is the core of any buy or rent comparison.

2. PTZ 2026: what kind of conditions should you expect?

At the time of writing, the exact law for PTZ 2026 may still change, but recent versions provide a realistic framework for your buy or rent simulations.

2.1. Income ceilings and zones

PTZ is only available if your reference income is below a certain limit. As an order of magnitude (based on recent brackets, subject to change):

• Zone A (expensive metro areas): for a couple, income ceiling around €51,800 per year.
• Zone B1: for a couple, around €43,200.
• Zone C (low-pressure markets): for a couple, around €33,600.

These are indicative only. For the simulation, the key point is whether you’re eligible or not. If you’re not, your taux_pret applies to 100% of the mortgage. If you are, a slice of your loan is financed at 0%.

2.2. Eligible property types in 2026

Recent reforms have steered PTZ towards:

• New-build apartments in big cities (collective housing).
• Existing homes with major renovation in less pressured areas: typically at least 25% of the total budget must be dedicated to works, often energy upgrades.

It is likely that PTZ 2026 will keep this logic: more generous where the government wants to support homeownership, tighter in overheated markets.

3. Numeric example: buying with PTZ 2026 vs buying without PTZ

Let’s take a concrete example of a household wondering whether to buy or rent a flat in a B1 zone in 2026.

3.1. Base assumptions

• Purchase price (new-build): €250,000.
• Notary fees (new): 3% ≈ €7,500.
• Agency fees: included in the price.
• Down payment: €20,000.
• Total to finance: 250,000 + 7,500 − 20,000 = €237,500.
• taux_pret (standard mortgage) = 3.6% over 20 years.
• Borrower insurance: 0.30% of the borrowed capital per year.

3.2. Scenario 1: without PTZ

You borrow the full €237,500 at 3.6% over 20 years.

• Monthly payment, excluding insurance ≈ €1,390.
• Insurance (0.30%) ≈ €60/month initially.
• Total monthly mortgage cost ≈ €1,450.

Total interest over 20 years (excluding insurance) is roughly €97,000.

3.3. Scenario 2: with PTZ 2026

Assume you are eligible for a PTZ covering 30% of the property price (excluding fees):

• PTZ amount: 250,000 × 30% = €75,000 at 0%.
• Standard mortgage: 237,500 − 75,000 = €162,500 at 3.6%.

Keeping a 20-year horizon for comparability:

• Standard mortgage (162,500 at 3.6%, 20 years) ≈ €950/month excl. insurance.
• PTZ monthly payment (if repaid over 20 years with no grace period): 75,000 / (20 × 12) ≈ €312/month (no interest).
• Insurance on the standard mortgage ≈ €40/month at the start.
• Total monthly payment ≈ €1,300.

Compared to the no-PTZ case (€1,450), the PTZ reduces your monthly burden by about €150. Over 20 years, the interest bill drops because you pay interest only on €162,500, not on €237,500. Roughly:

• Interest with PTZ: about €66,000.
• Interest without PTZ: about €97,000.
• Gross interest saving ≈ €31,000.

The effective average rate on the total €237,500 is much lower than 3.6%, since a large part is at 0%. This is the figure you want to compare with:

• The investment rate you can reasonably expect if you rent and invest (e.g. 4–5% long term on equity ETFs, with risk).
• The long-term inflation rate (2–3% in recent years), which erodes the real value of your mortgage payments.

4. Buy or rent in 2026: why the loan rate (taux_pret) is the key driver

In our buy-or-rent.net simulator, the central lever for this topic is the taux_pret. PTZ 2026 does not change the nominal rate on your bank loan, but it changes how much of your total debt is exposed to that rate. That affects:

• The total interest paid.
• Your monthly cash-flow.
• Your ability to invest money in parallel.

4.1. Testing different taux_pret with and without PTZ

Let’s reuse the same example and vary taux_pret:

• Scenario A: taux_pret = 3.6%.
• Scenario B: taux_pret = 4.2% (if rates rise by 2026).

Without PTZ, on €237,500:

• At 3.6%: monthly ≈ €1,390 excl. insurance.
• At 4.2%: monthly ≈ €1,440 excl. insurance.

With PTZ (75,000 at 0%, 162,500 at taux_pret):

• At 3.6%: total monthly ≈ €1,300.
• At 4.2%: total monthly ≈ €1,340.

You can see that PTZ buffers the impact of rising rates, because the higher taux_pret only applies to part of the debt. In a buy or rent decision, this matters if local rents are rising quickly (IRL-linked) while your mortgage payment is fixed in nominal terms.

4.2. Comparing with renting

Assume the same flat rents for €1,050/month in 2026:

• Initial rent: €1,050.
• Annual rent increase: 2%/year (close to long-term IRL).

After 10 years, the rent would be roughly:

1,050 × (1.02)¹⁰ ≈ €1,280/month.

Your mortgage with PTZ is €1,300/month, fixed. Over time, the gap between renting and buying narrows. The real buy or rent question becomes:

• How much principal will you have repaid after 10, 15, 20 years at this taux_pret with PTZ?
• How much can you invest if you rent instead, at what investment rate, and with what level of risk?

This is precisely what the simulator is built to quantify, rather than relying on rules of thumb.

5. Other parameters you must include in a PTZ 2026 simulation

The loan rate (taux_pret) is central, but not sufficient. A solid buy or rent analysis also needs to factor in:

• Notary fees: around 2–3% in new-build, 7–8% in existing properties.
• Agency fees: typically 3–5% of the purchase price if not already included.
• Property tax (taxe foncière): from about €450 to more than €5,000 per year depending on the city, with annual reassessment.
• Borrower insurance: often 0.25–0.45% of the capital per year.
• Renovation costs: especially if you use PTZ for an old property with energy renovation (impact on DPE, heating bills, and long-term value).
• Prepayment penalties: usually capped at 3% of the remaining principal or 6 months of interest if you sell before maturity.
• Annual inflation: it reduces the real weight of fixed mortgage payments but also erodes cash if your savings rate is too low.

The PTZ 2026 zero rate loan cuts the cost of debt, but it does not erase these other costs. In some markets, even with PTZ, renting can remain financially attractive if:

• Price-to-rent ratios are very high (expensive to buy vs cheap to rent).
• Your expected investment rate on financial assets is high.
• You plan to move again within a few years, making transaction costs (notary, agency, prepayment) very heavy.

6. How to use the simulator to test PTZ eligibility and loan rate scenarios

To move from theory to figures, use a structured approach in the buy or rent simulator:

• Enter the purchase price of the property you are targeting.
• Enter your down payment.
• Input your bank’s taux_pret (e.g. 3.6%).
• Create a scenario with PTZ: specify the PTZ share (20–40% in most cases) and term.
• Create a scenario without PTZ: 100% financed at taux_pret.
• Build a renting scenario: starting rent, annual rent increase (IRL), and your expected investment rate on the savings you keep.

The tool will project over 20 or 25 years:

• Your remaining mortgage balance.
• Your net wealth (property equity + financial assets).
• The total cost of owning vs cumulative rent paid.

The goal is not to tell you categorically that you must buy or you must rent. The right choice depends on your income stability, mobility plans, risk appetite and life goals. The simulator simply makes the trade-offs measurable, especially the impact of the PTZ zero rate loan and the underlying loan rate.

7. Conclusion: PTZ 2026 is a powerful lever if you manage your loan rate

The PTZ 2026 zero rate loan can significantly lower your average borrowing cost and make homeownership more affordable at mortgage rates around 3.6%. But it is only one piece of the buy or rent puzzle.

You still need to account for:

• Your PTZ eligibility (income, zone, property type).
• The actual taux_pret offered by lenders.
• Upfront and recurring ownership costs (notary, agency, property tax, maintenance, insurance).
• Local rent levels and their expected IRL-linked increase.
• The investment rate you can realistically achieve if you keep renting and investing.

Because every situation is different, this article cannot replace personalized financial advice. Instead of relying on generic rules, the most robust way to decide whether to buy or rent with PTZ 2026 is to simulate several loan rate scenarios and compare them to a renting path.

Simulate your situation on buy-or-rent.net and quantify, with real numbers, how the PTZ 2026 and your loan rate shape the long-term outcome of your housing choice.