The words “ceiling” and “standard allowance” come up often when talking about deductions. They do not mean the same thing.
The ceiling: an upper limit
A ceiling is the maximum amount you can deduct for a given category. Beyond it, the excess is no longer deductible. For example: old-age provision contributions (art. 111 bis) are deductible up to an annual ceiling set by law.
The standard allowance: an automatic minimum
A standard allowance (or minimum flat-rate) is an amount granted automatically, without supporting documents. For example, a minimum flat-rate for income-related costs and a minimum flat-rate for special expenses are applied automatically. If your actual expenses exceed the allowance, it is worth declaring them to deduct more.
The standard allowance is a floor granted automatically; the ceiling is an upper limit not to be exceeded. Between the two, it is your actual supporting documents that count.
Why does it matter?
Knowing these limits avoids two mistakes: under-declaring (and therefore paying more than necessary) or overestimating a saving. Reminder: a ceiling is a deduction limit, not a promise of tax savings — the actual saving depends on your personal situation. The exact amounts change from one tax year to another; we check them with you.
General information, subject to legal and contractual conditions and your personal situation; to be confirmed with the ACD (Luxembourg tax authority) or a qualified professional.