Warning lights
Signals from the annual accounts, the CBE and the Official Gazette, each with its threshold and source. No score, no verdict.
-
Two loss years in a row NBB
Negative result in 2024 and 2025.
Financials
Financial year 2025
Tandem - Architecture & Énergie from Sint-Lambrechts-Woluwe, company number BE0633530061, closed financial year 2025 with a result of € -7,297 after tax. For that financial year Tandem - Architecture & Énergie recorded a gross margin of € 3,063 and equity of € 35,183. Compared with financial year 2024, the result moved from € -11,630 to € -7,297. The company made a loss. The company holds a healthy buffer. A strong own buffer against the debts. The most recent annual accounts were filed with the National Bank of Belgium on July 6, 2026.
€ 35,183
▼ 17% vs 2024
Assets minus debts, by the books. What is left if everything were sold and paid today.
€ -7,297
▲ 37 % less loss than in 2024
Profit after tax over the fiscal year.
€ 27,085
▲ 19% vs 2024
Cash and bank balances on the last day of the fiscal year.
Loss, nothing to pay out
Reserves fell to € 28,983.
People and assets in 2025
≈ 1
No payroll staff. One director, so that person most likely runs the business.
€ 1,928
▼ 69% vs 2024
Book value of vehicles, furniture and equipment.
Debts at end 2025
€ 225
▼ 84% vs 2024
Loans from banks and other lenders, long and short.
€ 1,269
▼ 23% vs 2024
Supplier invoices still open on the last day of the fiscal year.
€ 9,027
▲ 163% vs 2024
Corporate tax and VAT still to pay. No wage debt: nothing outstanding to staff or social security.
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| 2022 | 2023 | 2024 | 2025 | Change 2024 → 2025 | |
|---|---|---|---|---|---|
| Gross margin | € -1,142 | € 18,842 | € -4,494 | € 3,063 | ▲ € 7,557 |
| Profit after taxes | € -13,945 | € 8,725 | € -11,630 | € -7,297 | ▲ € 4,333 |
| Equity | € 45,386 | € 54,111 | € 42,481 | € 35,183 | ▼ 17% |
| Total debts | € 34,447 | € 28,644 | € 21,488 | € 25,231 | ▲ 17% |
| Cash | € 26,343 | € 40,382 | € 22,840 | € 27,085 | ▲ 19% |
| Land & buildings | € 2,778 | € 2,381 | € 1,985 | € 1,588 | ▼ 20% |
| Retained profit | € 39,186 | € 47,911 | € 36,281 | € 28,983 | ▼ 20% |
| Bank debt | € 6,588 | € 2,859 | € 1,422 | € 225 | ▼ 84% |
| Balance sheet total | € 79,833 | € 82,755 | € 63,969 | € 60,414 | ▼ 6% |
Key figures of Tandem - Architecture & Énergie, fiscal years 2022 to 2025, from the annual accounts filed with the National Bank of Belgium.Next annual account (fiscal year 2026) expected before 31 July 2027.
What happened to Tandem - Architecture & Énergie?
What happened at Tandem - Architecture & Énergie in recent years, according to the Belgian Official Gazette, the CBE and the National Bank:
- New annual accounts for financial year 2025: loss of € 7,297. Source: NBB ↗
- New establishment in Hoeilaart. KBO
- New establishment in Sint-Lambrechts-Woluwe. KBO
- New establishment in Hoeilaart. KBO
- Start of the company according to the CBE. KBO
In short
From € 13,945 loss in 2022 to € 7,297 loss in 2025.
Paid € 7,117 in corporate taxes since 2022.
Best year ever: 2023, with € 8,725 profit.
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De Lijn 8 June 2026 New annual account 2025
filed on 8 June 2026
What was left
€ 20 k ▼ 91%
Money in the bank
€ 178 k ▼ 98%
Open the dossier →
NMBS 8 June 2026 New annual account 2025 What was left ▼ 80%
bpost 18 May 2026 New annual account 2025 What was left from loss to profit
Management
Behind Tandem - Architecture & Énergie is Joelle Decorte.
Directors
According to the 2025 annual accounts
Joelle Decorte
Director
Establishments
Establishment units
Physical locations of this company
Januarilaan 30 box 2
1200 Sint-Lambrechts-Woluwe
Kelleveldweg 3
1560 Hoeilaart
Active since 3 July 2015
Raymond Lauwersstraat 11
1560 Hoeilaart
Active since 1 January 2019
What is an establishment unit? An establishment unit is a geographically identifiable place where activities of the enterprise are carried out.
Website
Technologies
Hosting & Email
Email provider
Self-hosted
Hosting
GANDI-AS Domain name registrar - www.gandi.net, FR
Website info
Features
Security
Details
- Company number
- 0633.530.061
- VAT number
- BE 0633.530.061
- Registered office
- Januarilaan 30 bus 2, 1200 Sint-Lambrechts-Woluwe
- Names & denominations
- Tandem - Architecture & Énergie
- Enterprise type
- Rechtspersoon
- Legal form
- Private limited company
- Legal situation
- Normale toestand
- Start date
- 3 July 2015
- Peppol
- Active · Active since 27 Dec 2025
- Contact
- tandem-architecture.be
- Activities · NACE
Activiteiten van bouwarchitecten