TANDEM is an architecture firm in Tervuren. Private Limited, started on 18 January 2013, 1 establishment.

What is the address of TANDEM?

The registered office of TANDEM is located at Nieuwstraat 23, 3080 Tervuren.

Is TANDEM still active?

Yes. According to the CBE (30 October 2026) TANDEM is active, legal situation “Normale toestand”, started on 18 January 2013.

Is TANDEM registered on Peppol?

Yes, TANDEM is registered on the Peppol network with ID 0208:0502600649.

What is the enterprise number of TANDEM?

The enterprise number of TANDEM is BE0502600649.

When was TANDEM founded?

TANDEM was founded on 18 January 2013.

Who are the directors of TANDEM?

According to the 2025 annual accounts, the directors of TANDEM are: OLIVIER MAQUENNE, JULIE HERION.

Is TANDEM a reliable company?

Databakkes does not pass judgement; this is what the sources say: Active according to the CBE since 18 January 2013; 4 annual accounts filed, latest fiscal year 2025; 2 directors known from the annual account.

How much profit did TANDEM make in 2025?

TANDEM recorded a loss after taxes of € 15,631 in financial year 2025.

What is the revenue of TANDEM?

As a small company, TANDEM is not required to publish revenue in its annual accounts. In financial year 2025, its added value was € 33,639.

TANDEM (Private Limited) - Tervuren - BE0502600649

Dossier TANDEM, printed on 30 October 2026 from databakkes.be/en/0502600649/tandem. Sources: CBE, National Bank of Belgium, Belgian Official Gazette.

Warning lights

Signals from the annual accounts, the CBE and the Official Gazette, each with its threshold and source. No score, no verdict.

Negative equity NBB

More debt than assets in 2 of the last 4 fiscal years.
Two loss years in a row NBB

Negative result in 2024 and 2025.
Tight liquidity NBB

Cash and receivables cover 32 % of short-term debt in 2025; threshold 65 %.

Financials

Financial year 2025

TANDEM from Tervuren, company number BE0502600649, closed financial year 2025 with a result of € -15,631 after tax. For that financial year TANDEM recorded a gross margin of € 33,639 and equity of € -8,423. Compared with financial year 2024, the result moved from € -27,832 to € -15,631. The company made a loss. More debts than assets. High debts against a small own buffer. The most recent annual accounts were filed with the National Bank of Belgium on August 18, 2026.

What it is worth Caution

€ -8,423

▼ € 3,231 vs 2024

Assets minus debts, by the books. What is left if everything were sold and paid today.

Loss Caution

€ -15,631

▲ 44 % less loss than in 2024

Profit after tax over the fiscal year.

Cash in the bank

€ 5,007

▼ 82% vs 2024

Cash and bank balances on the last day of the fiscal year.

Where the profit goes Caution

Loss, nothing to pay out

Reserves fell to € -28,883.

People and assets in 2025

Vehicles and equipment

€ 4,900

▼ 20% vs 2024

Book value of vehicles, furniture and equipment.

Debts at end 2025

Bank debt ≈ 22 years to go The accounts give the long-term loan and the part due within the year. The remainder divided by that part is the number of years at an equal pace; a new loan or early repayment changes it.

€ 286,206

▼ 5% vs 2024

€ 12,773 is repaid this year. At this pace the long-term loan is gone in ≈ 22 years.

Owed to suppliers

€ 89

▼ € 26,195 vs 2024

Supplier invoices still open on the last day of the fiscal year.

Taxes

€ 9,036

▲ 84% vs 2024

Corporate tax and VAT still to pay. No wage debt: nothing outstanding to staff or social security.

Key figures per fiscal year Download key figures (CSV)
	2022	2023	2024	2025	Change 2024 → 2025
Gross margin	€ 16,552 Gross margin 2022: € 16,552 First fiscal year in the series	€ 46,698 Gross margin 2023: € 46,698 ▲ 182% vs 2022 (€ 16,552) Favourable step	€ 14,962 Gross margin 2024: € 14,962 ▼ 68% vs 2023 (€ 46,698) Unfavourable step	€ 33,639 Gross margin 2025: € 33,639 ▲ 125% vs 2024 (€ 14,962) Favourable step	▲ 125%
Profit after taxes	€ -21,866 Profit after taxes 2022: € -21,866 First fiscal year in the series	€ 6,238 Profit after taxes 2023: € 6,238 ▲ € 28,104 vs 2022 (€ -21,866) Favourable step	€ -27,832 Profit after taxes 2024: € -27,832 ▼ € 34,070 vs 2023 (€ 6,238) Unfavourable step	€ -15,631 Profit after taxes 2025: € -15,631 ▲ € 12,201 vs 2024 (€ -27,832) Favourable step	▲ € 12,201
Equity	€ 16,403 Equity 2022: € 16,403 First fiscal year in the series	€ 22,640 Equity 2023: € 22,640 ▲ 38% vs 2022 (€ 16,403) Favourable step	€ -5,192 Equity 2024: € -5,192 ▼ € 27,832 vs 2023 (€ 22,640) Unfavourable step	€ -8,423 Equity 2025: € -8,423 ▼ € 3,231 vs 2024 (€ -5,192) Unfavourable step	▼ € 3,231
Total debts	€ 492,903 Total debts 2022: € 492,903 First fiscal year in the series	€ 381,304 Total debts 2023: € 381,304 ▼ 23% vs 2022 (€ 492,903) Favourable step	€ 403,998 Total debts 2024: € 403,998 ▲ 6% vs 2023 (€ 381,304) Unfavourable step	€ 363,369 Total debts 2025: € 363,369 ▼ 10% vs 2024 (€ 403,998) Favourable step	▼ 10%
Cash	€ 23,962 Cash 2022: € 23,962 First fiscal year in the series	€ 54,517 Cash 2023: € 54,517 ▲ 128% vs 2022 (€ 23,962) Favourable step	€ 27,456 Cash 2024: € 27,456 ▼ 50% vs 2023 (€ 54,517) Unfavourable step	€ 5,007 Cash 2025: € 5,007 ▼ 82% vs 2024 (€ 27,456) Unfavourable step	▼ 82%
Land & buildings	€ 412,297 Land & buildings 2022: € 412,297 First fiscal year in the series	€ 255,918 Land & buildings 2023: € 255,918 ▼ 38% vs 2022 (€ 412,297) Unchanged	€ 249,259 Land & buildings 2024: € 249,259 ▼ 3% vs 2023 (€ 255,918) Unchanged	€ 242,601 Land & buildings 2025: € 242,601 ▼ 3% vs 2024 (€ 249,259) Unchanged	▼ 3%
Retained profit	€ 10,203 Retained profit 2022: € 10,203 First fiscal year in the series	€ 14,580 Retained profit 2023: € 14,580 ▲ 43% vs 2022 (€ 10,203) Favourable step	€ -13,252 Retained profit 2024: € -13,252 ▼ € 27,832 vs 2023 (€ 14,580) Unfavourable step	€ -28,883 Retained profit 2025: € -28,883 ▼ € 15,631 vs 2024 (€ -13,252) Unfavourable step	▼ € 15,631
Bank debt	€ 444,472 Bank debt 2022: € 444,472 First fiscal year in the series	€ 326,440 Bank debt 2023: € 326,440 ▼ 27% vs 2022 (€ 444,472) Favourable step	€ 302,629 Bank debt 2024: € 302,629 ▼ 7% vs 2023 (€ 326,440) Favourable step	€ 286,206 Bank debt 2025: € 286,206 ▼ 5% vs 2024 (€ 302,629) Favourable step	▼ 5%
Balance sheet total	€ 509,305 Balance sheet total 2022: € 509,305 First fiscal year in the series	€ 403,944 Balance sheet total 2023: € 403,944 ▼ 21% vs 2022 (€ 509,305) Unchanged	€ 398,806 Balance sheet total 2024: € 398,806 ▼ 1% vs 2023 (€ 403,944) Unchanged	€ 354,946 Balance sheet total 2025: € 354,946 ▼ 11% vs 2024 (€ 398,806) Unchanged	▼ 11%

Key figures of TANDEM, 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?

What happened at TANDEM in recent years, according to the Belgian Official Gazette, the CBE and the National Bank:

Aug 18, 2026 New annual accounts for financial year 2025: loss of € 15,631. filed late Source: NBB ↗
Jan 18, 2013 New establishment in Tervuren. KBO
Jan 18, 2013 Start of the company according to the CBE. KBO

In short

From € 21,866 loss in 2022 to € 15,631 loss in 2025.

Paid € 644 in corporate taxes since 2022.

Best year ever: 2023, with € 6,238 profit.

Original PDFs at the National Bank ↗

Management

OLIVIER MAQUENNE JULIE HERION

TANDEM

Studio Julie Hérion

Behind TANDEM are OLIVIER MAQUENNE and JULIE HERION. JULIE HERION is also behind Studio Julie Hérion.

Directors

According to the 2025 annual accounts

OLIVIER MAQUENNE

Director

JULIE HERION

Director

Also active at: Studio Julie Hérion

Establishments

Establishment units

Physical locations of this company

Registered office

Nieuwstraat 23

3080 Tervuren

2.216.205.916

Gaystraat 12 box A

3080 Tervuren

Active since 18 January 2013

Who else lives here?

A building full of entrepreneurs or one very busy letterbox? Another 1 companies are registered at this address.

All companies at this address →

Studio Julie Hérion same network

€ 33,873 gross margin · 2025

What is an establishment unit? An establishment unit is a geographically identifiable place where activities of the enterprise are carried out.

Details

Company number

0502.600.649

VAT number

BE 0502.600.649

Registered office

Nieuwstraat 23, 3080 Tervuren

Names & denominations

TANDEM

Enterprise type

Rechtspersoon

Legal form

Private limited company

Legal situation

Normale toestand

Start date

18 January 2013

Peppol

Active · Active since 23 Sept 2025

Activities · NACE

Activiteiten van interieurarchitecten

Activiteiten van reclamebureaus

View on CBE Public ↗ Annual accounts (NBB) ↗

TANDEM

Warning lights

Financials

What happened to TANDEM?

Management

Directors

Establishments

Establishment units

Who else lives here?

Details

Frequently asked questions