A property showing a 6% gross yield on an Excel spreadsheet can drop to 3%, or even lower, once vacancy, unpaid rent, condominium charges and taxation are actually taken into account. In France, the gap between the advertised gross yield and the actual net yield commonly reaches 30 to 40%, and the net-net yield after tax can fall below 2% for an investor taxed at 30%. It is not that your calculation is wrong, it is that it is incomplete: a spreadsheet does not anticipate the tenant who leaves without notice, the boiler that breaks down in the middle of winter, or the general meeting that votes for a facade renovation. In this article, I explain, from the perspective of an advisor who works with investors every day, why theory and the real world often tell two different stories, and above all how to secure your project before it becomes a headache.
In summary
- The gross yield shown in listings systematically ignores vacancy, unpaid rent, non-recoverable charges and taxation, which artificially inflates the actual yield by 30 to 40%.
- Condominium charges and unforeseen works (facade renovation, roofing, elevator) are the main sources of unpleasant budget surprises for landlords.
- Day-to-day rental management (finding a tenant, move-in and move-out inspections, payment reminders, claims) takes a lot of time that many owners greatly underestimate at the time of purchase.
- Good support upfront, from valuing the property to reading the condominium documents, helps avoid most of the disappointments that turn a profitable project into a burden.
Why the advertised yield is almost never the real yield
When you look at a listing, you see a price, a rent, and a division that gives a flattering percentage. This is the famous gross yield: annual rent divided by purchase price, multiplied by one hundred. The problem is that this figure only tells a third of the story. It says nothing about what will actually end up in your pocket at the end of the year.
The gap between gross, net and net-net
On a national average, gross yield is around 5.2%. Once you deduct the property tax (taxe foncière, up nearly 4% in recent years according to INSEE), non-occupant landlord insurance, management fees and a realistic provision for vacancy, you end up with a net yield that fluctuates more between 2.5 and 4.5%. And if you carry the calculation through to the end by including tax on the rent received, the so-called "net-net", you can fall below 2% for an owner in a 30% marginal tax bracket. In other words, the figure that made you sign is almost never the one you will actually collect.
A concrete example to understand the gap
Let's take a studio bought for 150,000 euros and rented for 650 euros per month, i.e. 7,800 euros in annual rent. Advertised gross yield: 5.2%. Now deduct one month of vacancy, the national average (about 650 euros), the property tax (900 euros), non-recoverable condominium charges (600 euros), PNO insurance (150 euros) and a small provision for works (300 euros). Only 6,200 euros net remain, i.e. a yield of 4.1%. Add income tax and social contributions, and you come closer to 2.5 to 3%. It is not dramatic, but it is clearly no longer the figure that appeared in the listing.
Vacancy and unpaid rent, two risks that are always underestimated
No one buys a rental property thinking it will remain empty for six months or that the tenant will stop paying. And yet, these are two of the main factors that drag down the actual yield of an investment.
Vacancy: one month a year, on average, is not an exception
On a national average, vacancy is estimated at about one month per year, i.e. 8.3% of annual rent that simply evaporates. In high-demand areas such as certain large cities, this figure can drop to two weeks, but in more relaxed markets or for poorly positioned properties (wrong price, poor condition, wrong neighborhood), vacancy can climb to two months or even more. This is why, even before signing, it is essential to know the local rental market well, the balance between supply and demand, and the rent actually charged in the neighborhood, not the one you would like to obtain.
Unpaid rent: the risk no one wants to consider
Unpaid rent accounts for an average of 1 to 3% of rents across the French rental stock, but this rate can climb to 5 or 7% for landlords who have not taken out any unpaid rent guarantee. A GLI insurance policy generally costs between 2 and 4% of the rent collected, which seems expensive until the day a tenant stops paying for eight months during eviction proceedings. On that day, the insurance becomes the best decision you have ever made.
The expert's view
"I have seen investors turn up with an impeccable Excel spreadsheet, neatly aligned columns, and a net-net yield calculated down to the decimal, only to call me six months later completely overwhelmed because the syndic had just voted €18,000 of roof works spread over the next three years; the truth is that a property is not a fixed financial product, it is a living asset that ages, that has tenants with real lives, unforeseen events and moods, and that belongs to a co-ownership where others sometimes decide on your behalf on expenses you had not anticipated; my role is not to dampen the enthusiasm of someone who wants to invest, it is to help them look at the property as it really is before the purchase, to read the last three minutes of general meetings, to check the state of the maintenance log, to plan over ten years and not just the first rent collected, because a successful rental project is never the one with the best calculation line, it is the one that was prepared with eyes wide open."
Co-ownership charges and works, the real grey area
This is probably the item that prospective landlords most often misjudge. They look at the amount of current charges shown in the listing, factor it into the calculation, and think they have covered the question. Except that co-ownership charges are not fixed; they change, and above all, they can skyrocket overnight.
The maintenance log, your best ally before buying
Before buying a property in a co-ownership, always request the building's maintenance log and the minutes of the last three general meetings. These documents tell you whether a facade renovation, a roof repair, a replacement of the collective boiler or an elevator compliance upgrade has already been voted on or merely discussed. An older, poorly maintained building may seem inexpensive to buy and prove to be a financial pit three years later, when you receive a call for funds of several thousand euros.
Anticipating a works provision, even when everything seems new
Even on a recent property, it is better to set aside a small reserve each year for routine maintenance: a boiler that breaks down, a leak, a water heater to replace. It is this kind of expense, individually modest but recurring, that silently eats away at the net profitability of a rental investment year after year.
Day-to-day rental management, a job in its own right
Rental investment is often imagined as passive income: you buy, you rent, and the money comes in every month. In practice, managing a rented property takes time, availability and sometimes strong nerves.
Finding and selecting the right tenant
Writing a listing, organizing viewings, reviewing applications, checking guarantees, drafting the lease, carrying out the move-in inspection: each of these steps takes time and demands real rigor. A poor choice of tenant at the outset can cost far more than one additional month of vacancy spent finding the right profile.
Handling the unexpected, reminders and turnover
Water damage on a Sunday evening, a tenant who no longer responds to your reminders, a lease renewal to prepare, a move-out to coordinate: rental management is an accumulation of small tasks which, taken together, amount to several hours a month. This is exactly why many landlords end up delegating this management to an agency or an advisor, even if it means accepting fees which also reduce the net profitability initially displayed.
The practical tip
- Before any purchase, always request the last three minutes of general meetings and the building's maintenance log.
- Systematically include a vacancy provision of at least one month per year in your profitability calculation, even in high-demand areas.
- Take out unpaid rent guarantee insurance as soon as the property is put up for rent, rather than treating it as an optional extra.
- Always calculate your profitability in three stages: gross, net of charges, then net-net after taxes, before comparing several properties with one another.
- Get support from a professional who knows the local market to validate the rent that can realistically be achieved, not just the one you are hoping for.
Taxation, a powerful but poorly understood lever
Many investors choose the non-professional furnished rental scheme (LMNP) without truly understanding the tax mechanisms that make it so attractive, or the pitfalls that can result from it.
LMNP under the réel regime: the little-known tax weapon
Under the réel regime, the LMNP status allows you to deduct all the actual expenses related to the rental: loan interest, property tax (taxe foncière), co-ownership charges, management fees, insurance, maintenance work, and even your chartered accountant's fees. Thanks to the depreciation mechanism applied to the property and the furniture, it is possible to pay no tax on the rent received for 15 to 25 years, depending on the value of the property. This is a considerable advantage, provided you keep your accounts properly, which generally requires the support of a professional.
Deductible or depreciable work: the nuance that changes everything
Be careful with the distinction between maintenance and repair work, which is immediately deductible from rental income, and improvement or extension work, which must be depreciated over several years. A misclassification can have a direct impact on your tax for the year, so it is best to have this point confirmed before undertaking major work.
How to secure your rental project from the start
The good news is that almost all of these pitfalls can be anticipated if you take the time to prepare your project properly before signing anything.
Choosing the right property, not just the right price
A poorly located property, one with poor insulation, or one in a fragile co-ownership will never become a good investment, regardless of its purchase price. Take the time to compare the property listings available in your target area to get a realistic idea of the prices and rents in place, and never rely solely on the sales pitch of a seller in a hurry.
Surrounding yourself with the right professionals
A notaire to secure the transaction, a chartered accountant for taxation, and above all a real estate advisor who knows the local market to help you assess the property's real rental potential: it is this combination that makes the difference between a project that delivers on its promises and one that disappoints. If you are unsure how to proceed, do not hesitate to find a local real estate advisor who can support you from start to finish, from the search for the property through to putting it up for rent.
And if you already own property, how to take back control
If you already own a rental property that demands more energy than expected, it is never too late to reassess the situation.
Reassessing the real profitability of your current property
Redo your calculation with the real figures from the past year: actual vacancy, expenses actually paid, time spent on management. If the result is disappointing, it is not necessarily inevitable, but a sign that you may need to adjust the rent, renegotiate an expense, or change your management method.
Selling rather than enduring
Sometimes, the best decision is still to sell a property that has become unmanageable in order to reinvest elsewhere, in an asset that is easier to manage or better located. Before making any decision, it is useful to have your property valued to find out its current market value and calmly weigh up whether to keep, renovate or sell.
Conclusion
A spreadsheet will never replace the reality on the ground, and that is precisely what makes rental investment both exciting and demanding. The yield shown in a listing is only a starting point; what really matters is your ability to anticipate vacancy, unpaid rent, condominium charges, renovation work and the management time that this type of project requires. The national figures confirm it: between the gross yield and the net-net yield, the gap can represent a 30 to 40% loss in profitability, and it is precisely this margin of error that must be built into the very first calculation. The good news is that none of this is insurmountable as long as you are well supported and well informed before signing. A successful rental project is never a matter of chance; it is the result of thorough preparation, a clear-eyed view of the risks, and professional support that spares you unpleasant surprises. That is exactly the role we play every day for our clients, sellers and investors alike.
FAQ - Frequently Asked Questions
What is the difference between gross yield and net yield?
Gross yield is calculated by dividing the annual rent by the purchase price, without taking charges into account. Net yield deducts non-recoverable charges such as the property tax (taxe foncière), insurance, management fees and rental vacancy. On average, the gap between the two represents 30 to 40% of the gross yield displayed.
How much does rental vacancy really cost in France?
On a national average, rental vacancy represents about one month per year, or 8.3% of the annual rent. This figure can drop to two weeks in a very high-demand area, but climb to two months or more for a property that is poorly positioned in terms of price or location.
Should you take out unpaid rent insurance?
It is strongly recommended. Without coverage, unpaid rent can climb to 5 to 7% of rents over the term of a lease, compared with 1 to 3% on average with careful tenant selection. The cost of the insurance, between 2 and 4% of rents, remains far lower than the risk incurred in the event of prolonged non-payment.
Does the LMNP status really allow you to pay no tax on rental income?
Yes, thanks to the depreciation mechanism for the property and furniture under the "réel" regime, it is possible to pay no tax on rental income for 15 to 25 years depending on the value of the property and the deductible expenses. However, this arrangement requires rigorous accounting, generally entrusted to a chartered accountant.
How can you avoid unpleasant surprises related to condominium charges?
The best approach is to request the building's maintenance logbook and the last three minutes of general meetings before purchase. These documents reveal work that has already been voted on or is being considered, such as a facade renovation or a roof repair, which can represent several thousand euros in additional charges.
Author of the publication
Fabrice DOBROWOLSKI, Director of the Optimhome network
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