First-Time Buyer Guide: Your Complete Roadmap to a First Home

First-time buyer: where should you start?

When you’re a first-time buyer, the key question is not “Which bank should I choose?”, but “buy or rent, which is more rational for me today?”. The answer depends on concrete parameters that our simulator uses: loan rate (taux_pret), loan amount (montant_fn) and borrower insurance rate (taux_assurance).

This guide explains, with numbers, how these three levers shape your first purchase and how a first-time buyer can use them to compare buy or rent objectively, instead of relying only on emotion or social pressure.

Important: the elements below are general and informational. They are not personalized financial advice. You should always run your own calculations and speak with professionals. Simulate your situation on buy-or-rent.net.

1. Loan rate (taux_pret): the main driver of your mortgage cost

1.1. Where are mortgage rates for first-time buyers?

In 2024–2025, fixed rates for a first-time buyer in Europe typically range around 3.6% to 3.9% over 20–25 years, depending on your profile, down payment and lender. A difference of just 0.5 percentage points in the taux_pret can add up to several tens of thousands of euros over the life of the loan.

1.2. Example: €250,000 over 25 years

Assume a first-time buyer finances €250,000 over 25 years (excluding insurance):

• Scenario A: taux_pret = 3.6%
• Scenario B: taux_pret = 4.1%

Approximate monthly payment (principal + interest, no insurance):

• A (3.6%): about €1,265 / month
• B (4.1%): about €1,333 / month

That’s a difference of roughly €68 per month, or more than €20,000 over 25 years. For a first-time buyer, that can flip the buy or rent calculation, especially if the equivalent rent is close to those amounts.

1.3. How the loan rate changes the buy or rent comparison

To compare buy or rent, you need to put side by side:

• On the buying side: mortgage payment (taux_pret), insurance (taux_assurance), property tax, service charges, maintenance, notary/closing fees, potential agency fees.
• On the renting side: rent + annual increase (linked to inflation indexes), renter’s insurance, and above all your capacity to save and the investment rate if you invest the difference between rent and mortgage in financial assets (savings accounts, ETFs, etc.).

A lower taux_pret brings your monthly payment closer to your rent, or even below it. In that case buying may look obviously better, but only if you also factor in hidden costs (closing fees, property tax, maintenance) and the return on alternative investments. That’s exactly what the buy or rent simulator is designed to calculate.

2. Loan amount (montant_fn): how much you really borrow

2.1. What is montant_fn for a first-time buyer?

The montant_fn is the actual amount you borrow: purchase price + transaction costs – down payment. For first-time buyers the down payment is often small, which mechanically increases the montant_fn and therefore:

• Your monthly payment
• The total interest you pay (which depends on the taux_pret)
• Your insurance cost (because it’s based on the borrowed capital)

2.2. Example: €220,000 with and without down payment

Property price: €220,000
Closing/notary fees (existing property): 8% ≈ €17,600
Total to be funded: €237,600

Scenario 1: no down payment (montant_fn = €237,600)

• Loan over 25 years at 3.6%
• Monthly payment (excl. insurance) ≈ €1,201

Scenario 2: €20,000 down payment (montant_fn = €217,600)

• Loan over 25 years at 3.6%
• Monthly payment (excl. insurance) ≈ €1,100

Result: about €100 less per month, or roughly €30,000 over 25 years, just by lowering the montant_fn with a down payment. For a first-time buyer, delaying the first purchase by 1–3 years to build more savings can dramatically change the buy or rent outcome.

2.3. Montant_fn and early resale risk

First-time buyers often sell sooner than expected (job move, break-up, children). If you sell after 6–7 years, when you’ve barely repaid the principal:

• You still owe a large part of the montant_fn
• You may face early repayment penalties (up to 3% of the remaining capital or 6 months of interest)
• You have to absorb the initial closing/notary costs

In that case, a high montant_fn and a long term can make buying less efficient than renting and investing the difference. The buy or rent simulator lets you test different holding periods, which is crucial for a realistic first-time buyer guide.

3. Insurance rate (taux_assurance): the hidden extra monthly cost

3.1. Typical range for a first-time buyer

For a first-time mortgage, the taux_assurance generally ranges between 0.25% and 0.45% of the borrowed capital per year, depending on age, health and coverage. Banks push their in-house group policy, but using an external insurer can significantly reduce this rate.

3.2. Example: €250,000 mortgage

Borrowed capital (montant_fn): €250,000
taux_assurance: 0.35% (bank policy) vs 0.20% (external provider)

Insurance at 0.35%:

• Annual cost ≈ 250,000 × 0.35% = €875
• ≈ €73 / month

Insurance at 0.20%:

• Annual cost ≈ 250,000 × 0.20% = €500
• ≈ €42 / month

Difference: about €31 per month, or close to €9,300 over 25 years. For a first-time buyer, optimising the taux_assurance can partly offset a higher taux_pret or keep the total monthly cost close to the rent in the buy or rent calculation.

3.3. Insurance and borrowing capacity

Lenders look at your debt-to-income ratio. An expensive insurance pushes up your total monthly payment (loan + insurance) and can:

• Reduce the montant_fn the bank is willing to lend
• Force you to extend the term (increasing total interest)

In the buy or rent comparison, it is not enough to focus on the taux_pret alone: the combination of taux_pret + taux_assurance is what really matters.

4. First-time buyer case study: buy or rent with real numbers

4.1. Case: renting at €950 vs buying for €230,000

You’re a first-time buyer currently renting for €950 / month. You are looking at an apartment for €230,000 in the same area.

Buying assumptions:

• Price: €230,000 (existing property)
• Closing/notary fees: 8% ≈ €18,400
• Down payment: €20,000
• montant_fn: €228,400
• taux_pret: 3.6% over 25 years
• taux_assurance: 0.30%
• Property tax: €1,000 / year

Monthly mortgage (excl. insurance): ≈ €1,155
Insurance: 228,400 × 0.30% ≈ 685 / year ≈ €57 / month
Total mortgage + insurance: ≈ €1,212 / month

Additional yearly ownership costs:

• Property tax: €1,000
• Maintenance / non-recoverable charges: assume €600 / year

Effective monthly cost of owning (excluding unexpected repairs) ≈ €1,212 + (1,600 / 12) ≈ €1,345 / month.

Immediate comparison:

• Current rent: €950 / month
• Full ownership cost: €1,345 / month

Difference: about €395 / month. If you stay a renter and invest those €395 at a net investment rate of, say, 4% per year, the future wealth gap can become meaningful. On the other hand, by buying you build housing equity but reduce your capacity to invest in financial assets. The buy or rent simulator can project both wealth paths over 10, 15 or 20 years.

4.2. Holding period: a critical variable for first-time buyers

If you think you might sell after 5 years:

• The initial closing/notary fees (€18,400) will barely be amortised
• You will have mostly paid interest, not principal
• You may have to pay early repayment penalties

In this short horizon, even a decent taux_pret may not make buying more efficient than renting and investing. But if you plan to stay for 12–15 years, principal repayment on the montant_fn becomes more significant, and buying may catch up with and then beat renting, depending on property price and rent trends.

5. How to improve your first-time buyer profile

5.1. Improve the taux_pret

• Clean up your accounts: no overdrafts, stable income, regular saving.
• Shorten the term if you can: a 20-year loan usually has a lower taux_pret than a 25-year loan, but the monthly payment is higher.
• Shop around: getting quotes from several banks or brokers can easily save you 0.2–0.3 percentage points.

5.2. Optimise the montant_fn

• Build a down payment: at least enough to cover transaction fees plus part of the price.
• Adjust your budget: choosing a home 10% cheaper can massively reduce monthly cost and insurance.
• Negotiate the purchase price: a 5% discount on €250,000 = €12,500 less borrowed.

5.3. Reduce the taux_assurance

• Compare insurance offers (bank vs independent providers).
• Choose the right coverage split if you borrow with a partner (100/100 vs 50/50, etc.).
• Review your insurance later: in many markets it’s possible to switch insurer during the loan; the buy or rent simulator can incorporate this into your scenarios.

6. What really matters in the buy or rent decision

For a first-time buyer, the core question is not “Can I get a mortgage?”, but “buy or rent, which option builds more net wealth for me given my constraints?”.

The three simulator parameters highlighted here — taux_pret, montant_fn and taux_assurance — directly affect:

• Your real monthly cost vs rent
• Your saving and investing capacity
• Your flexibility if you need to sell early
• The total cost of ownership over time

There is no universal answer: for some people, buying early is efficient; for others, staying a renter for a few years, saving and investing before a first purchase is more rational. It depends on your holding period, career mobility, risk tolerance and long-term goals.

7. Use a simulator to make your first purchase decision

Instead of relying on rules of thumb (“rent is throwing money away”, “you must buy as soon as possible”), a first-time buyer should model different scenarios:

• Changing the taux_pret by ±0.5 percentage points
• Testing higher or lower down payments (impact on montant_fn)
• Switching to a cheaper insurer (lower taux_assurance)
• Varying the holding period: 5, 10, 15 years
• Adjusting assumptions for rent growth and property prices

That’s exactly what our buy or rent tool does: you plug in your first-time buyer data, test multiple assumptions and see, in euros, the future wealth gap between renting and owning.

This content is informational and does not constitute personalized financial advice. To know whether, as a first-time buyer, it makes more sense for you to buy or rent right now, the only rational approach is to run the numbers for your case.

Simulate your situation on buy-or-rent.net and adjust the taux_pret, montant_fn and taux_assurance to design your own first-time buyer strategy.