Several tasks depend on each other, and doing them out of order is what turns a manageable month into a frustrating one. This is the sequence.
Day one: the keys and the inventory
The état des lieux d'entrée is the comparator against which your guarantee is judged at the end, and the guarantee is capped at two months' rent excluding charges on any lease signed since 1 August 2024.
Do it with the property empty, before furniture arrives. Record every existing mark in words as well as photographs: "scratch, 8 cm, left of door frame, hallway" is evidence; "some marks" is not. Include the cave, and confirm it is numbered and empty.
Photograph every meter with its serial number and reading on the same day. Count the keys, badges and any parking remote against the inventory, since missing access devices are one of the few deductions a landlord can justify with a real invoice.
Week one: the commune and the post
The declaration of arrival at the population office is due within eight days of establishing residence, and within three working days of arriving on the territory for third-country nationals. It produces your entry in the national register, which most administrations read your address from.
Where you move from another Luxembourg commune, the new commune handles the deregistration from the old one.
Put your name on the letterbox and the entryphone in the same week. Significant documents arrive by post here, including confirmation of social security affiliation, the tax card, and any formal landlord notification sent by registered letter.
Week one: the energy contract
The network operator and the supplier are separate entities. Creos operates the network and performs the meter reading on behalf of all suppliers; your supplier sells the energy. Switching supplier requires no change to the meter.
Default supply is regulated but priced above ordinary contract tariffs, so four months on it is a purely avoidable cost. Arrange the contract in the first week rather than the first quarter.
Take out contents and liability insurance at the same time, which almost every lease requires and which is frequently requested at the signature meeting itself.
Week one: the building
Get the syndic's name and emergency number, since in an apartment a surprising share of what goes wrong is a common-part matter: the lift, the entrance, the cellar corridors, the roof, the heating plant where it is collective.
Ask for the règlement de copropriété and any règlement d'ordre intérieur, since most leases bind the tenant to respect them and they govern pets, bicycles, balconies and what may be stored where.
Get the waste calendar from the commune and the bin arrangement from the syndic or the outgoing tenant. Incorrect sorting can mean a bin is not collected, which affects the whole building.
Weeks two to four: the chain that runs itself
Social security affiliation is normally submitted by your employer to the CCSS. The tax administration then issues the fiche de retenue d'impôt automatically, typically within around thirty working days, without any request from you.
Notice if it does not arrive, because in its absence an employer must apply the highest class-1 rate, which cannot be below 33%. That is the single most expensive thing to leave unchecked in a first month.
Luxembourg health cover works on a reimbursement model: you pay and then claim, so every consultation generates an invoice to submit.
Weeks two to four: the map
Stand at the building entrance, set a timer for five minutes and walk in three directions. Five things should sit inside that radius on level ground: a supermarket you would genuinely use, your stop, a pharmacy, a bakery and green space.
Then check their real opening hours for the days you are free. The law of 19 December 2025, in force from 19 June 2026, permits Monday to Friday 05:00 to 21:00 and Saturdays, Sundays and public holidays 05:00 to 19:00, but permitted is not obligatory.
Find your commune's market day, which is the second weekly anchor, and identify a doctor and a dentist before you need one, since waiting times are the constraint.
What to buy, and in what order
Lighting first. Unfurnished Luxembourg lettings frequently come with bare ceiling fixtures or none, and the sun sets before half past four in late December. Three or four sources at different heights cost less than a chair and move to the next apartment.
Then a rug, which changes the warmth of a hard floor across a heating season running roughly October to April and, in a building with timber floors, reduces what carries to the neighbours below. Then curtains, hung close to the ceiling. Then closed storage against the longest uninterrupted wall.
Everything else can wait. Live in the space for a fortnight before arranging it properly, since most people arrange a room the way the previous occupant did.
Before the first winter
Find out who services the boiler, since in many Luxembourg leases the annual service is allocated to the tenant. Bleed the radiators, check the thermostatic valves turn, and look at the corners of external walls and window reveals for any dark bloom.
Document anything you find with dated photographs and raise it in writing early. A problem recorded in November is a maintenance question; the same problem found at an exit inspection is an argument about your guarantee.
Three questions we are asked
What is the most common first-month mistake? Leaving the energy supply on default tariff, and not putting a name on the letterbox. Both are minutes of work and both cost real money or real time.
Do I need to do the inventory with the agent? It is normally done together. Take your own photographs regardless and send them by email the same day, which creates a dated record.
How long before it feels settled? Realistically the second winter, once the fixed points are automatic rather than discovered.
The dependency chain, in one paragraph
Several tasks unlock others, and knowing the order removes most of the frustration.
The employment contract opens a bank account, frequently remotely and before you have an address. The bank account makes a rental file competitive and pays the guarantee, capped since August 2024 at two months' rent excluding charges. The lease serves as proof of accommodation at the commune. The commune registration produces the national register entry that most administrations read your address from. And the social security affiliation, filed by your employer with the CCSS, triggers the tax card automatically.
Trying to do any of these before the one it depends on is the single most common source of lost weeks in a first month.
Editorial note: This is a framework for a housing decision, not advice on a specific property. Communal rules, building regulations and market practice in Luxembourg change. Verify with your commune, your lease or règlement de copropriété, and guichet.lu before relying on any of the above.