A SOPARFI approves its accounts within six months of the year-end and files them with the RCS within seven. Its tax returns for the previous year are due by 31 December, with quarterly advances. Most holdings pay the minimum net wealth tax of EUR 535, 1,605 or 4,815. Dividends trigger a withholding return within eight days. Loans need arm's length pricing, the board needs to decide in Luxembourg, and RCS and RBE changes go in within a month, now enforced by daily penalties.
A holding company that does nothing still has a full diary
A SOPARFI, the société de participations financières, is not a special legal form. It is an ordinary Luxembourg SARL or SA that holds shares, lends to its subsidiaries and receives dividends and gains. It is fully taxable, which is exactly why it has access to tax treaties and the EU directives. The price of that access is a year of filings with four different bodies: the direct tax administration (ACD), the VAT authority (AED), the Luxembourg Business Registers (LBR) and, for some holdings, the central bank (BCL).
Most obligations are cheap to meet and expensive to miss. A dividend paid without the eight-day withholding return, a loan priced without a transfer pricing file, or a board that never meets in Luxembourg can cost far more than the structure saves.
This note is the compliance and tax calendar. The corporate law side, meaning meetings, the legal reserve, interim dividends and capital changes, is in our companion note on running a Luxembourg SARL or SA. Here we cover what a holding files and checks each year, month by month, with a checker at the end.
7 months
Approval within six months, RCS filing within one more.
31 December
Returns for the previous year, with quarterly advances.
EUR 535 to 4,815
Minimum by balance sheet total since 2025.
1 month
RCS and RBE changes, now with daily penalties.
Annual accounts: approval, eCDF and the RCS
Every SOPARFI keeps double-entry books on the standard Luxembourg chart of accounts (plan comptable normalisé, PCN) and prepares annual accounts: balance sheet, profit and loss account and, unless the company is small enough for the abridged format, notes. The shareholders approve them within six months of the year-end. The approved accounts are filed with the RCS within one month of approval and no later than seven months after the year-end: 31 July for a calendar year.
The filing is electronic and structured. The balance sheet and profit and loss account are submitted through the eCDF platform in the standard format, which is then passed to the RCS and published. The ACD sees the same figures, so the tax return and the filed accounts must match. Late deposits cost higher fees and trigger the LBR procedure described below.
A holding is audited only if it exceeds two of three size criteria on two consecutive year-ends: a balance sheet of EUR 7.5 million, net turnover of EUR 15 million and 50 employees. Holdings rarely have turnover or staff, so many stay below the line. An SA still needs a supervisory auditor (commissaire). Our note on annual accounts in Luxembourg walks through the format and the filing.
Law and practice: Law of 19 December 2002 on the RCS and on bookkeeping and annual accounts, with the size thresholds updated by the Grand-Ducal Regulation of 25 October 2024; Grand-Ducal Regulation on the standard chart of accounts (PCN); Law of 10 August 1915, Articles 450-8 (SA) and 710-23 (SARL) on approval of the accounts. Guichet.lu, Filing annual accounts.
Returns, advances, net wealth tax and withholding tax
Three returns, one deadline. A SOPARFI files a corporate income tax return, a municipal business tax return and a net wealth tax return each year. The law sets 31 May of the following year; the ACD grants a general extension to 31 December, and that is the date that matters in practice. The 2025 returns of a calendar-year holding are therefore due by 31 December 2026, and the 2026 returns by 31 December 2027. Returns are filed electronically. Corporate income tax is 16% before the 7% employment fund surcharge, municipal business tax 6.75% in Luxembourg City: 23.87% combined in 2026.
Many holdings pay little income tax because their income is exempt. Dividends and capital gains on a participation of at least 10%, or with an acquisition cost of at least EUR 1.2 million for dividends and EUR 6 million for gains, held for at least twelve months, are exempt under the participation exemption. The catch: expenses linked to the exempt income, including interest on the debt that financed the shares, are not deductible up to the exempt dividend and are recaptured when the shares are sold with an exempt gain.
Quarterly advances. The ACD sets advances on the basis of the last assessment. Corporate income tax advances fall on 10 March, 10 June, 10 September and 10 December. Municipal business tax and net wealth tax advances fall on 10 February, 10 May, 10 August and 10 November. If income grows, ask for higher advances.
| Balance sheet total | Minimum net wealth tax |
|---|---|
| Up to EUR 350,000 | EUR 535 |
| EUR 350,001 to EUR 2,000,000 | EUR 1,605 |
| Above EUR 2,000,000 | EUR 4,815 |
Net wealth tax. Companies pay 0.5% of their unitary value, the net assets on 1 January, up to EUR 500 million and 0.05% above. Qualifying participations are exempt, so for most holdings the minimum net wealth tax decides the bill. Since tax year 2025 the minimum depends only on the balance sheet total, whatever the share of financial assets. The minimum is due even in a loss year.
A company can reduce its net wealth tax by booking a special reserve of five times the reduction and keeping it for five years. The reduction is capped at the corporate income tax of the previous year, so a holding with exempt income has little room to use it. It is booked in the resolution on the result, which is why the tax adviser should see the draft resolution.
Dividend withholding tax. A SOPARFI that pays a dividend withholds 15% and files form 900 with payment within eight days of the date the dividend is made available. If the resolution sets no payment date, the dividend is deemed available the day after the decision. A qualifying parent in the EU or in a treaty country, holding at least 10% or shares that cost EUR 1.2 million for twelve months, receives the dividend free of withholding. Interest bears no withholding tax. Our note on dividends to non-resident shareholders covers the treaty side.
An SARL holds 100% of a German GmbH and has a balance sheet total of EUR 3.2 million. In 2026 it receives a EUR 400,000 dividend, exempt under the participation exemption, and pays EUR 9,000 of costs. Its taxable income is nil, but the minimum net wealth tax is EUR 4,815, paid in four advances of about EUR 1,204. In June 2027 the shareholders approve a EUR 350,000 dividend to the two individual owners; the company withholds EUR 52,500 and files form 900 within eight days.
Law and practice: Income Tax Law (LIR), Articles 146 to 149 (withholding tax), 147 (exemption), 166 (participation exemption) and 174 (rates); Grand-Ducal Regulation on Article 166; Net Wealth Tax Law, Section 8 (rates and minimum tax) and Section 8a (reserve), the minimum amended for tax years from 2025 by the Law of 19 December 2024; General Tax Law (AO), Section 109 (extensions). Guichet.lu, Tax calendar; impotsdirects.public.lu, withholding tax forms.
VAT, financing and the interest limitation
VAT. A holding that only holds shares and receives dividends is not a VAT taxable person. That changes in three situations. First, when it buys services from abroad, such as legal or advisory fees, it must account for Luxembourg VAT under the reverse charge and needs a VAT number for that, usually under a simplified registration. Second, when it actively manages its subsidiaries and invoices them management fees, it becomes a taxable person. Since 2025 the small business exemption covers turnover up to EUR 50,000; above that, full registration and periodic returns follow. Third, a holding can register voluntarily to recover input VAT on costs linked to taxable fees.
A registered holding files periodic returns by the 15th of the month after the period, and an annual return. Annual filers submit it by 1 March; monthly and quarterly filers by 1 May. The standard rate is 17%. Input VAT linked to dividends is not recoverable, so a mixed holding apportions it. Our note on VAT registration in Luxembourg covers the procedure.
Transfer pricing on loans. Most SOPARFIs lend money to their subsidiaries or borrow from their shareholders. Article 56bis LIR requires arm's length terms, following the OECD guidelines. For companies whose main activity is intra-group financing, the circular on intra-group financing transactions of 27 December 2016 adds substance conditions and expects equity that matches the risks assumed, the equity at risk. It allows a simplification: an after-tax return of 2% on the financed assets for pure intermediaries that meet the substance conditions. Shareholder current accounts follow circular L.I.R. no. 164/1 of 29 January 2025, which abolished the old 5% rate.
Luxembourg has no general filing of a transfer pricing file with the return, but the ACD can ask for the supporting documentation, and the company must be able to show how the price was set. A benchmark of the interest rate, a credit rating of the borrower and a functional analysis are the core. Our note on transfer pricing in Luxembourg sets out what the file contains.
Interest limitation. Exceeding borrowing costs are deductible up to the higher of 30% of tax EBITDA and EUR 3 million. A standalone entity, with no associated enterprise and no permanent establishment abroad, is exempt. Most holdings sit under the EUR 3 million threshold, but a leveraged acquisition holding can reach it.
An SA borrows EUR 5 million from its shareholder at 6% and lends it to a Spanish subsidiary at 6.4%. A benchmark supports both rates, and the company keeps equity matching the credit risk it bears. Its taxable margin is EUR 20,000 a year. Without the file, both tax offices can adjust.
Law and practice: Law of 12 February 1979 on VAT, Article 57 (small business exemption, EUR 50,000 from 2025) and reverse charge rules; LIR, Articles 56, 56bis and 168bis (interest limitation); AO, Section 171 (documentation on request); Circular L.I.R. no. 56/1 – 56bis/1 of 27 December 2016; Circular L.I.R. no. 164/1 of 29 January 2025.
Substance, treaty access and exit
A SOPARFI is resident in Luxembourg if its registered office or its central administration is there. Treaty partners look further: where the board actually decides and whether it could act without instructions from abroad. A holding that is only a letterbox risks losing treaty benefits, the Parent-Subsidiary Directive exemption under the anti-abuse rule, and in the worst case its residence.
- Board. A majority of managers or directors resident in Luxembourg, or at least physically present at meetings held in Luxembourg.
- Decisions. At least one board meeting a quarter, with real agenda items: investments, loans, dividends, accounts.
- Minutes. Written, signed, showing who attended, from where and what was discussed.
- Office. A domiciliation agreement with a regulated provider, or own premises; books and records kept in Luxembourg.
- Bank. An account the board controls, with signatories who answer to the board.
- Capacity. Directors with the skills to understand the transactions and the authority to refuse them.
Residence certificate. To apply a treaty rate at source, the subsidiary's country often asks for a Luxembourg certificate of tax residence. The ACD issues it on request, and foreign tax offices increasingly ask about substance at the same time. Our page on substance requirements lists what tax offices ask for.
Exit tax. Moving the seat or the central administration abroad is treated as a liquidation for tax purposes, and the hidden reserves are taxed. Within the EU and EEA, payment of the tax on a transfer can be spread over five years. Check this before management moves abroad, even informally.
Law and practice: LIR, Articles 38, 159 and 172; Parent-Subsidiary Directive 2011/96/EU, Article 1(2) to (4) (anti-abuse rule); Council Directive (EU) 2016/1164 (ATAD), Article 5 (exit taxation); Law of 31 May 1999 on domiciliation; the 2016 financing circular on substance.
RBE, LBR, AML, DAC6, CRS, Pillar Two and the BCL
RBE. The register of beneficial owners shows the individuals who own or control more than 25%, or failing them the senior managers. Luxembourg has no annual confirmation. Every change is filed within one month of the company learning of it. Fines for failures run from EUR 1,250 to EUR 1,250,000.
LBR sanctions since 21 September 2026. The 2025 reform of the RCS and RBE laws gave the Luxembourg Business Registers power to sanction incomplete or outdated files. The enforcement phase started on 21 September 2026. The LBR sends a registered letter listing the deficiencies. After 30 days a warning appears on the public file; after 60 days the deficiencies are shown on extracts and certificates; after seven months a daily penalty of EUR 40 runs for up to 90 days, so EUR 3,600; after twelve months the company is struck off the register. Banks read the extracts long before the penalty bites.
AML and the domiciliation agent. The domiciliation agent must know its client under the anti-money laundering law: directors, beneficial owners, source of funds and main transactions, reviewed periodically. A holding that does not answer puts its domiciliation, and so its registered office, at risk.
DAC6. Cross-border arrangements with certain hallmarks are reported within 30 days. The intermediary reports first; the company reports itself if there is no intermediary or the intermediary is exempt. Fines reach EUR 250,000.
CRS and FATCA. A holding of an operating group is usually an active non-financial entity. A family holding whose portfolio is managed by a bank or an asset manager can be an investment entity, and therefore a reporting financial institution. It then files its own CRS and FATCA reports by 30 June, including nil reports. Penalties go up to EUR 250,000, plus 0.5% of amounts not reported. Crypto assets add the DAC8 reporting layer from 2026.
Pillar Two. The 15% minimum tax applies to groups with consolidated revenue of at least EUR 750 million in two of the last four years. Smaller groups should still record the scope test each year. See our note on Pillar Two for mid-sized groups.
BCL statistics. Holdings with participations or loans across borders can be asked by the Banque centrale du Luxembourg to report balance of payments and direct investment data. The BCL contacts those in scope; once a letter arrives, reporting is compulsory.
Law and practice: Law of 13 January 2019 on the RBE and Law of 19 December 2002 on the RCS, both amended by the Law of 23 January 2025; LBR enforcement phase from 21 September 2026; Law of 12 November 2004 on AML; Law of 25 March 2020 (DAC6); Law of 18 December 2015 (CRS) and Law of 24 July 2015 (FATCA); Law of 22 December 2023 (Pillar Two); BCL regulations on statistical reporting.
Month by month for a 31 December year-end
The table shows the calendar year 2027 for a SOPARFI with a calendar financial year. Dates move with the year-end for the accounts; tax advances and returns follow the calendar year in which the financial year ends.
| Month | What falls due |
|---|---|
| January | 1 January: reference date for net wealth tax. 15 January: VAT return for Q4 (quarterly filers). Board meeting on the year-end and dividend plans |
| February | 10 February: municipal business tax and net wealth tax advance |
| March | 1 March: annual VAT return (annual filers). 10 March: corporate income tax advance. Draft accounts and transfer pricing update |
| April | Board meeting: draft accounts, interest rates, loan renewals |
| May | 1 May: annual VAT return (periodic filers). 10 May: business tax and wealth tax advance |
| June | 10 June: corporate income tax advance. 30 June: accounts approved; CRS and FATCA reports for reporting financial institutions |
| July | 31 July: accounts filed with the RCS through eCDF. Dividend withholding return within 8 days of any payment |
| August | 10 August: business tax and wealth tax advance |
| September | 10 September: corporate income tax advance. Board meeting; review of substance and the domiciliation KYC file |
| October | Prepare the 2026 tax returns; check the residence certificate needs for the coming year |
| November | 10 November: business tax and wealth tax advance |
| December | 10 December: corporate income tax advance. 31 December: 2026 corporate income tax, business tax and wealth tax returns |
| Any time | RCS and RBE changes within 1 month; DAC6 within 30 days; dividend withholding return within 8 days |
Penalties. Modest on their own; the real cost is lost standing with banks and tax offices.
| Failure | Consequence |
|---|---|
| Late or missing tax return | Surcharge up to 10% of the tax; fine up to EUR 25,000 |
| Late tax payment | Interest of 0.6% a month |
| Accounts not filed with the RCS | Higher fees; fines of EUR 500 to EUR 25,000 for managers; LBR procedure |
| Outdated RCS or RBE file | LBR: EUR 40 a day for up to 90 days, then striking off; RBE fines EUR 1,250 to 1,250,000 |
| Dividend withholding not declared | Tax due by the company, with interest and surcharges |
| DAC6 report missed | Fine up to EUR 250,000 |
| CRS or FATCA failures | Up to EUR 250,000 plus 0.5% of amounts not reported; EUR 10,000 for a missing nil report |
Build your SOPARFI compliance calendar
The calendar starts from today and runs twelve months. Event-driven obligations have no fixed date: the deadline runs from the payment, the change or the arrangement.
Your SOPARFI compliance calendar
Describe the holding. You get the dated obligations for the next twelve months, the minimum net wealth tax, the substance red flags and the VAT and transfer pricing points to check.
Approve within six, file within seven.
Returns for the previous year, advances every quarter.
Withholding return after each dividend.
Board in Luxembourg, minutes, a file for every loan.
SOPARFI annual compliance: frequent questions
When does a SOPARFI file its tax returns?
The law sets 31 May of the following year for the corporate income tax, municipal business tax and net wealth tax returns, but the tax office routinely extends the deadline to 31 December. In practice the 2025 returns of a calendar-year holding are due by 31 December 2026, filed electronically.
How much is the minimum net wealth tax for a holding?
Since tax year 2025 it depends only on the balance sheet total: EUR 535 up to EUR 350,000, EUR 1,605 up to EUR 2 million and EUR 4,815 above. Because qualifying participations are usually exempt from net wealth tax, the minimum is what most holdings actually pay.
Does a pure holding company need a VAT number?
A holding that only receives dividends is not a taxable person and does not register. It must register, often under a simplified procedure, when it buys services from abroad that fall under the reverse charge, and fully once it charges management fees to its subsidiaries above the EUR 50,000 small business threshold or chooses to register to recover input VAT.
Is there an annual beneficial owner confirmation in Luxembourg?
No. Unlike Belgium, Luxembourg has no yearly confirmation. Every change in the beneficial owners must be filed with the RBE within one month of the company learning of it, and the Luxembourg Business Registers now check files actively, with daily penalties since 21 September 2026.
When is the dividend withholding tax return due?
Within eight days of the date the dividend is made available to the shareholders, on form 900, with payment of the 15% tax. Dividends to a qualifying EU or treaty parent holding at least 10%, or shares that cost at least EUR 1.2 million, for twelve months can be paid free of withholding tax.
Do Luxembourg holding companies report under CRS?
It depends on the classification. A holding of an operating group is usually an active non-financial entity. A family holding whose portfolio is managed by a bank or asset manager can be an investment entity: then it is a reporting financial institution and files its own CRS and FATCA reports by 30 June.
Does Pillar Two apply to my holding?
Only if the group has consolidated revenue of at least EUR 750 million in two of the four preceding years. Below that, the holding is outside the minimum tax, but the scope check is worth recording each year as the group grows.