You handle other people's money: co-ownership funds, works funds, rent collected for landlords. What sets it apart from your own turnover, and why two sets of books beat one.

In short. A syndic or property manager in Luxembourg actually keeps two sets of books that must never be mixed: the accounts of their own company, and the accounts of each co-ownership (syndicat des copropriétaires) or each landlord they work for. The co-owners' money, the working-capital fund, the works fund and the rent collected on behalf of others are not your turnover: they sit on separate accounts, as third-party funds. Your turnover is your management fees, charged with VAT at the standard rate of 17 %. At Advena, these books are kept in real time, on a fixed monthly fee, from 325 € per month.

Managing buildings on behalf of others is a trade of its own, and so is its accounting. You collect money that is not yours, you split charges between co-owners, you report to a general meeting, and yet your company has its own accounting life, its own taxes and its own annual accounts. Confusing these two layers is costly: it distorts your result, muddies your VAT and chips away at your clients' trust. Here is how a syndic, a property administrator or a lettings manager keeps the books in Luxembourg, and where the mistake bites.

A regulated trade before it is an accounting one

Before any bookkeeping, you need the right to practise. The property administrator and the co-ownership syndic require a business permit distinct from the estate agent's, under the amended law of 2 September 2011 on the right of establishment. Many people blur this line, and we already flagged it in our guide to the accounting of a real estate agency: selling property for others, administering it, and acting as syndic for a co-ownership are three separate activities, each with its own duties. A firm wearing several hats takes on several rulebooks, and it shows in the accounts.

On the co-ownership side, the framework is set by the amended law of 16 May 1975 on the statute of co-ownership of built property, together with its implementing rules. It defines who decides what, the role of the syndic, and how a building's accounts are kept and approved. You do not have to become a lawyer, but your accounting must follow that logic: funds that belong to the co-ownership, decisions taken at a general meeting, and a yearly rendering of accounts.

Two sets of books that must never merge

This is the heart of the matter, and the point handled worst. A syndic keeps, on one side, the accounts of their own company: fees earned, staff, rent, equipment, taxes. On the other, for every building they manage, they keep the accounts of the co-ownership: the calls for funds, the building's charges, their allocation across the lots, and the annual statement. These are two separate worlds, with two treasuries, two ledgers and two audiences.

The golden rule fits in one sentence: a building's money never passes through your company's profit and loss. A charge call collected for the co-ownership is not income for you; it is money you hold and will use to pay the lift maintainer, the heating engineer or the building's insurer. If that money climbs, even for a moment, into your turnover, your accounts are lying. A serious manager physically separates the two: each co-ownership's funds on their own account, and a per-building set of accounts that can say, at any time, exactly what is owed to whom.

The co-owners' money is not your cash

A syndic constantly handles sums that are not theirs. They fall into a few clearly identified pots:

  • Calls for current charges: the provisions co-owners pay to cover upkeep, energy, insurance and the building's running costs.
  • The working-capital fund: a permanent cash advance that keeps the co-ownership from running dry between two calls.
  • The works or reserve fund: savings built up over time to finance major future works, facade, roof, replacement of equipment.
  • Rent and rental deposits, in lettings management, collected on behalf of landlords and paid over after charges and your fees are deducted.

None of these amounts is income for your company. They are all tracked as third-party funds, on separate bank accounts, building by building and owner by owner. It is a point of discipline that co-owners expect, that the general meeting checks, and that a dispute tests at once: the day you have to prove where the euro paid two years ago went, clean accounts protect you and muddled accounts accuse you.

Co-ownership funds, third-party rent, management fees: want a setup that keeps every flow cleanly apart? We configure it, on a fixed fee.

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Your fees, by contrast, really are your turnover

What you earn is not the building's money, it is your fees: syndic fees, lettings-management fees, charges for the specific services set out in the contract. These fees are a supply of services, subject to VAT at the standard rate of 17 %, as we set out in our guide to VAT rates in Luxembourg in 2026. So you charge VAT on your fees and recover the VAT on your own business expenses.

The subtlety is that the charges you re-bill to the co-ownership are not your fees. Paying the lift maintainer's invoice with the building's funds, then allocating it across the co-owners, is not a sale you make: it is the co-ownership's expense that you carry out in its name. Only your management remuneration is your taxable income. Treating the one like the other inflates your turnover artificially and manufactures VAT to remit on money that was never yours.

Lettings management: a steady rhythm, third-party funds everywhere

Lettings management follows the same logic as the syndic, applied to landlords rather than to a building in co-ownership. You collect the rent on behalf of the owners, you may pay charges, you take your management fee, then you pay over the balance. The rent is never your income: it belongs to the owner, and only your fee is yours. If the property is held through a dedicated structure, the owner's accounting is a separate topic, which we covered in our article on the accounting of a property company.

The appeal of lettings, for you, is its rhythm: recurring, predictable fees month after month, which balance out the syndic side. The risk is the sheer number: many small mandates, many small amounts, many third-party accounts to keep without letting anything slip. It is exactly the kind of tracking where a late entry or a mis-posted pay-over quickly turns into a dispute.

PCN 2020, annual accounts and your company's taxes

Behind the buildings' accounts sit your own. If you trade through a company, your management entity keeps double-entry books under the standard chart of accounts, the PCN 2020, draws up its annual accounts and files them with the trade register. It is liable for corporate income tax, municipal business tax and net wealth tax, whose calculation we detail in our article on corporate tax in Luxembourg. The baseline of duties common to any company, whatever the sector, is set out in our guide to the accounting obligations of an SME in Luxembourg.

So the particularity of a property manager is not the complexity of any single entry, it is the discipline of compartmentalisation: keeping your own books without ever contaminating them with the buildings', and keeping the buildings' books without ever letting them spill into yours.

How we keep a property manager's books

We keep your accounts in the Odoo we configure for your activity: your fees and their 17 % VAT on one side, the flows of each co-ownership and each lettings mandate as third-party funds on the other, on separate accounts that do not cross. Your receipts, your invoices and your expenses live in one place, so your real margin and your position towards each building read in real time, not the following spring. For a trade where you must be able to account for every euro held for others, this continuous tracking is not a comfort, it is a protection. All of it fits into a fee agreed in advance, from 325 € per month, all-in and with no hourly billing: a question put to your account manager does not cost extra. The detail of the market's billing models is in our article on the cost of an accounting firm in Luxembourg, and the whole picture in our complete guide to accounting firms for an SME.

Who this model does not suit

Let us be plain. Our fixed fee and our real-time approach are aimed at the Luxembourg syndic, property administrator or lettings manager who wants to steer their margin and stay beyond reproach on the funds they hold for others. If all you want is to file one set of accounts a year at the lowest price, never looking at your books between two year-ends, our continuous tracking will not serve you. And if your activity stretches into administering portfolios of hundreds of buildings with very particular structures, or into sharp legal advice on co-ownership law, that goes beyond routine bookkeeping: we inform and point you to the specialist competence you need, without ever claiming a regulated title we do not hold.

Want an accountant who understands a syndic's double life and gives you your figures while they still matter? Let's talk.

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Frequently asked questions

Must a syndic separate the co-owners' money from its own cash?

Yes, it is the basic principle of the trade. The calls for funds, the working-capital fund and the works fund belong to the co-ownership, not to the syndic. They are kept as third-party funds, on separate bank accounts, building by building, and must never climb into the turnover or cash of the management company.

Are a syndic's fees subject to VAT in Luxembourg?

Yes. Syndic and lettings-management fees are a supply of services, subject to VAT at the standard rate of 17 %. By contrast, the building charges that the syndic re-bills to the co-ownership are not its fees: they are expenses carried out on behalf of the co-owners, not to be booked as the syndic's taxable income.

Do you have to keep accounts building by building?

Yes. Each co-ownership has its own accounts: calls for funds, charges, allocation across the lots, and an annual statement approved at the general meeting. So a syndic keeps as many sets of building accounts as it has mandates, on top of its own company's accounts. The two layers stay strictly separate.

Is the works fund booked as income?

No. The works fund, or reserve fund, is the co-ownership's savings set aside to finance future major works. It is the co-owners' money, tracked as third-party funds. It is never income for the management company, even if it passes through an account the company administers for the co-ownership.

Must a property manager file annual accounts?

Its own company, yes, if it has that form: it keeps its books under the PCN 2020, draws up its annual accounts and files them with the trade register, like any commercial company. The accounts of the buildings it manages follow co-ownership logic and are rendered at the general meeting, which is a separate exercise.

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Why Advena?

We are the only Luxembourg accounting firm that keeps your books inside the management tool it deployed for you, configured for a property manager's double life: your fees and their VAT on one side, each co-ownership's and each mandate's funds as third-party funds on the other. A fee agreed in advance from 325 € per month, a named account manager, your position readable at all times and no surprise invoice. We inform you of the rule and keep it for you; we point you to specialist advice when your situation calls for it, without claiming a regulated title we do not hold.

General framework in force on 8 October 2026: co-ownership is governed by the amended law of 16 May 1975 on the statute of co-ownership of built property, and access to the property administrator profession by the amended law of 2 September 2011 on the right of establishment. Rules can change: check the official sources (guichet.lu, logement.public.lu) before any binding decision. This article informs and does not replace an analysis of your situation.

Tell us how many buildings and mandates you manage, and we'll tell you what it costs to keep it all straight. No phantom quote.

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