Top 10 mistakes made by landlords in Paris

The 10 Costly Mistakes Buy-to-Let Landlords Make in Paris

Renting out an apartment in Paris looks, on paper, like an ideal investment. High demand, some of the highest rents in France, and a property value that increases over the long term. Yet, behind this flattering picture, many owners discover another reality: a net profitability eaten away by avoidable decisions, tax treatment endured rather than chosen, and sometimes an in-place tenant who turns the investment into an administrative nightmare.

Most of these situations are not due to bad luck. They stem from a limited number of repetitive mistakes, which we encounter at BAUVAUT when taking over properties from other agencies or taking on management for landlords who wanted to do everything themselves. Here are the ten most expensive ones — those that turn a high-performing rental investment into a painful chore.

1. Underestimating the market and renting too quickly — or too expensively

This is the initial mistake. The owner bases their rent on the neighbor's listing upstairs, on what they thought they read on SeLoger last year, or worse, on the amount they need to cover their mortgage. None of these benchmarks are valid.

In Paris proper, rent control applies to almost the entire rental stock. Exceeding the increased reference rent exposes you to a retroactive adjustment and a dispute that the tenant can initiate up to three years after moving in. Conversely, under-valuing your property by €80 per month represents nearly a thousand euros lost every year — without any compensation. A rigorous valuation, based on recent market data and deep knowledge of the neighborhood, is not a luxury: it is the foundation.

2. Choosing the wrong rental framework

Airbnb, Civil Code lease, 1989 Act lease: these three frameworks are not interchangeable, and choosing the wrong one can compromise your profitability for years.

An owner who keeps renting out their property for short-term lets when their co-ownership association prohibits it, or when they have not obtained a change of use permit for their secondary residence, faces fines of up to €100,000. Conversely, a landlord who signs a 1989 Act lease when their natural target is a corporate professional relocating for twelve to eighteen months deprives themselves of a 20 to 30% higher rent — precisely what a furnished Civil Code lease allows.

3. Rushing the tenant's application review

The urgency of finding a tenant pushes too many landlords to approve an application without thoroughly checking it. A quickly photocopied tax assessment, three unverified pay slips, a guarantor listed on the lease without having checked their own solvency.

A few weeks later, the first unpaid rent occurs. And in Paris, eviction proceedings last between eighteen and thirty months, during which the property remains occupied with no income coming in. A seriously vetted application — document authenticity, rent-to-income ratio below 33%, professional stability, solid guarantors — costs two hours of work. An eviction process costs tens of thousands of euros.

4. Neglecting the move-in inventory of fixtures

The inventory of fixtures is not a formality: it is the key document that determines who pays for what upon departure. A document rushed in fifteen minutes, without photos, with vague descriptions like "good general condition," will systematically work against the landlord.

A scratch on a herringbone parquet floor, a missing bathroom seal, a loose baseboard: if nothing is recorded at move-in, you cannot withhold anything from the security deposit upon departure. A professional inventory of fixtures today produces between forty and sixty pages with time-stamped photos for each room. This makes the difference between a security deposit you rightfully withhold and a deposit you return through gritted teeth.

5. Ignoring compliance obligations

Energy Performance Certificate (DPE), risk assessments, Carrez or Boutin surface area, electrical compliance, smoke detector: the list grows longer with every legislative term and continues to evolve in 2026.

A landlord offering a property rated F or G for rent is now breaking the law. In Paris, the ban already affects nearly 15% of the private rental stock. Beyond the fine, the tenant can demand a retroactive rent reduction, or even the termination of the lease. These obligations are not negotiable: they determine the very legality of the rental.

6. Underestimating the THRS on vacant properties

This is the most expensive tax blind spot we correct for our new landlord clients. The housing tax on secondary residences (THRS) hits any vacant or furnished property that is not occupied as a primary residence on January 1st. In Paris, the municipal surcharge brings the overall rate to particularly high levels.

A lease that ends on December 31st mechanically leaves the property vacant at the time of the tax's triggering event. The result: several thousand euros of THRS for a few days of administrative vacancy. The solution is purely operational — shifting lease end dates, anticipating turnovers — but it requires a management approach that plans taxes in advance, not in reaction.

7. Confusing gross tax status with net profitability

Many landlords still think only in terms of rent received and forget that the real indicator is what remains after taxes, building charges, property tax, and provisions. With the micro-BIC reform that came into force in 2025 and is fully applied in 2026, deductions for unclassified furnished rentals fell to 30% with a cap of €15,000 in annual revenue. For a short-term rental owner, this is a paradigm shift: the actual regime (régime réel) almost systematically becomes more relevant than the micro-BIC, provided it is structured correctly.

The LMNP status (non-professional furnished landlord) with depreciation, deduction of mortgage interest, deductible expenses: these levers do not trigger themselves. A landlord who chooses their tax regime at the time of tax filing rather than when renting out the property loses, on average, several thousand euros per year.

8. Wanting to manage everything yourself to save money

This is the most humanly understandable mistake — and often the most expensive. The landlord calculates: "5% management fee, that's €1,500 a year, I'll save that." What they don't calculate: the weeks of vacancy due to a poorly positioned listing, the contractor charging premium emergency rates on a Sunday, the hours spent on the phone with a tenant in conflict, the tax penalties for ignored letters.

Managing a rental property in Paris yourself requires availability, legal expertise, and a network of tradespeople that take years to build. For an active owner, delegating is not an expense: it is a transfer of hidden costs to a visible, controlled cost.

9. Listing your property with multiple agencies at the same time

This is a marketing mistake that seems clever — multiplying opportunities by instructing two or three agencies at once — but yields the opposite effect. A property listed simultaneously appears with slightly different prices, photos that are sometimes inconsistently retouched, and descriptions that do not match. For the prospective tenant, especially in the expat and corporate segment, the signal is immediate: the property smells of urgency, division, and a lack of professionalism.

An exclusive mandate given to an agency that masters its market segment is worth more than three simple mandates that cancel each other out. This is not a matter of agent ego: it is a matter of market perception.

10. Failing to plan for the tenant's departure

The final mistake, the one you discover when it is too late: not preparing the turnover. Notice given in the middle of the low rental season, a property that wasn't refreshed between two tenants, repairs put off that scare away the best viewing candidates.

Rental vacancy is never neutral. Every month without rent in Paris represents between €1,200 and €4,000 depending on the property — equivalent to years of management fees. A well-prepared turnover, with early re-listing, updated photos if necessary, and marketing targeted on the right channels, often allows renting again with zero vacancy. This is the detail that separates a high-performing investment from one that lies dormant.

Profitability is decided in the details — not in the listed rent

None of these mistakes are spectacular when taken individually. But combined, they turn a Parisian apartment into a mediocre investment. Conversely, a property that is correctly positioned, legally secured, tax-optimized, and managed without interruption can show a net yield several points higher than the market average.

It is precisely this invisible work — anticipation, rigor, network — that distinguishes an owner who endures their property from an owner who takes full advantage of it.

Do you own property in Paris or its inner suburbs and recognize one or more of these mistakes in your situation? BAUVAUT assists you with a tailored approach: a comprehensive audit of your property, choosing the most efficient tax regime, and full management for short, medium, or long term. Request your free, no-obligation audit.