Belgian Investment Deduction for SMEs 2026: rates, conditions and how to claim

The Belgian investment deduction (investeringsaftrek / déduction pour investissement) is a tax incentive that lets a Belgian company deduct an additional portion of an asset's acquisition value from its taxable profit, on top of the regular depreciation. The deduction is processed entirely through the corporate tax (vennootschapsbelasting / impôt des sociétés) return and produces a direct cash impact in the year of investment.

The legal basis sits in articles 68 and following of the Belgian Income Tax Code (WIB 92). The federal legislator overhauled the regime in 2024-2025, consolidating a wide range of partial deductions into a small number of clearly defined base rates with increases for specific categories.

The four pillars of the Belgian investment deduction in 2026:

1. Single (one-off) base deduction — 8% for SME companies on ordinary investments, applied once in the year of investment. 2. Increased deduction — 13,5% (digital, energy, R&D, patents) up to 20,5% (security investments). 3. Green deduction — new from 2025-2026, up to 40% for climate investments meeting strict criteria. 4. Spread deduction — 22,5% on annual depreciation for small companies investing in R&D or energy, distributed over the useful life.

The standard one-off investment deduction for SME companies is 8% of the acquisition or investment value of the asset in 2026. The deduction is applied once in the taxable period in which the investment was made.

Who qualifies as an SME company? A company is "small" within the meaning of article 1:24 §1-6 of the Belgian Code of Companies and Associations (WVV) when, on the balance sheet date, it does not exceed more than one of the following thresholds: - Annual average of 50 full-time equivalents - Annual revenue (excl. VAT) €11,25 million - Balance sheet total €6 million

Practical example: your company invests €75.000 in a new production machine in 2026. One-off deduction = 8% × €75.000 = €6.000. At the reduced corporate tax rate of 20% (applicable to SMEs on the first €100.000 of profit) this translates to €1.200 less tax in the year of investment.

What qualifies as an investment? New tangible or intangible fixed assets, capitalised on the balance sheet, with a useful life greater than one year, acquired in new condition, and used in Belgium for business purposes.

Carry-forward: if the deduction cannot be fully used in the year of investment due to insufficient profit, the unused balance carries forward indefinitely to subsequent financial years until exhausted.

Specific investment categories receive an increased deduction in 2026 instead of the base 8%. The rates for SME companies:

| Category | Deduction 2026 | |----------|----------------| | Digital investments (cybersecurity, e-commerce, AI, ERP systems) | 13,5% | | Energy investments (heat pumps, insulation, renewable energy) | 13,5% | | Research and development (R&D) investments | 13,5% | | Patents (acquired or developed) | 13,5% | | Security investments (alarms, cameras, payment security) | 20,5% | | Productive investments in seagoing vessels | 30% | | Reusable packaging | 3% additional (cumulative with base) |

Example 1 (digital): your company invests €40.000 in a new ERP system that qualifies as a digital investment. Deduction = 13,5% × €40.000 = €5.400. At 20% corporate tax €1.080 in tax savings.

Example 2 (security): a retail company invests €15.000 in a CCTV system and shop alarm. Deduction = 20,5% × €15.000 = €3.075. At 20% corporate tax €615 in tax savings.

Important: you choose one rate per investment — unlike the Netherlands, the Belgian regime does not allow stacking. The base 8% and the increased 13,5% or 20,5% are alternatives. For most qualifying investments the increased rate is obviously more favourable.

The Belgian federal government introduced in 2025-2026 a new green investment deduction with rates up to 40% for specific climate investments. The aim: accelerate corporate investment in technology aligned with European climate targets.

Green deduction rates 2026: - 40% for "green and digital" technology investments listed on the federal green list (e.g. battery storage for green electricity, geothermal heat pumps >100 kW, electric commercial vehicles >3,5 tons) - 30% for energy-efficient production processes (e.g. heat recovery, biomass installations) - 40% for investments in hydrogen technology and related infrastructure

Example: a logistics company invests €180.000 in an electric 7,5-ton truck on the federal green list. Green deduction = 40% × €180.000 = €72.000. At 25% corporate tax €18.000 in tax savings — on top of normal depreciation of €36.000 in year 1.

Conditions 2026: - Investment must be on the official federal "green investments" list (maintained by FPS Finance) - Comply with the UN SDG criteria - Apply for a certificate from FPS Environment within 6 months of investment - Investment used entirely on Belgian territory

Combination with base rate: the green deduction replaces the base deduction (no stacking). When in doubt, choose the higher percentage.

In addition to one-off deductions, small companies have access to the spread investment deduction. Instead of taking the deduction in one shot in the investment year, the percentage is calculated on the annual depreciation across the useful life of the asset.

Rate 2026: 22,5% of depreciation for: - Research and development (R&D) investments - Energy-saving investments

Condition: the company must employ no more than 20 full-time equivalents (annual average).

Example: your company invests €50.000 in R&D laboratory equipment with a 5-year useful life. Annual depreciation = €10.000. Spread deduction = 22,5% × €10.000 = €2.250 per year for 5 years = €11.250 in total.

When to choose spread over one-off? When the company has insufficient profit in the investment year to fully use the one-off deduction, and the carry-forward route creates extra administrative burden, the spread deduction provides a natural distribution without loss. For most growing SMEs, however, the one-off deduction is more attractive due to the year-1 cash flow impact.

Important: the choice between one-off and spread is per investment and is final once made. The choice is recorded in the corporate tax return for the investment year.

In contrast to the Netherlands (RVO notification for EIA/MIA), the Belgian investment deduction is processed entirely through the corporate tax return (form 275.U). No separate prior application, no confirmation certificate — only correct entries in the right boxes of the return.

Filing flow step by step:

1. Capitalise the investment in the accounts with acquisition date, cost price and planned depreciation period. 2. Determine the category. Select the applicable deduction category: ordinary base 8%, increased 13,5% / 20,5%, or green 40%. For increased deductions hold the supporting evidence ready (e.g. "energy saving" certificate from the regional energy agency). 3. Calculation in the return. In annex 275.U list per investment: acquisition value, category, percentage and calculated deduction. The total goes in box 90 of the main return form 275.1. 4. Retain supporting documents. Invoices, delivery notes, any certificates and the choice between one-off/spread must be kept for 7 years for audit.

Special certificates 2026: - Energy investments (increased 13,5%): certificate from the competent regional energy agency (VEA in Flanders, Bruxelles Environnement, Awac in Wallonia). - Green deduction (40%): certificate from FPS Environment. - R&D investments (increased 13,5% or spread 22,5%): declaration in line with the FPS Finance circular 2025/C/12 on R&D qualification.

FINEO generates the calculation automatically from the capitalised investments in the accounts and pre-fills the relevant boxes in the corporate tax return.

Belgian entrepreneurs with cross-border activities or considering a Dutch sister company often compare the two systems.

| Aspect | Belgium 2026 | Netherlands 2026 | |--------|--------------|------------------| | SME base deduction | 8% one-off | 28% (KIA, bracket) | | Energy | 13,5% increased | 40% (EIA) | | Environmental | 13,5%-40% (increased / green) | 27/36/45% (MIA) | | Free depreciation | Not available | 75% (VAMIL) on Milieulijst | | Prior notification | None, all via return | RVO notification within 3 months for EIA/MIA | | Carry-forward | Indefinite | Not applicable (KIA is annual) | | Stacking | No, one rate per investment | Yes (KIA + EIA, KIA + MIA + VAMIL) |

Conclusion: the Netherlands is more attractive for BVs investing up to roughly €130.000 per year (due to the high KIA bracket). Belgium offers advantages for long-term R&D programmes (spread deduction 22,5%) and for green investments meeting the stricter 40% criteria. For cross-border holdings, FINEO's advice centre analyses where each investment is most efficient.

FINEO handles the Belgian investment deduction entirely within the accounting platform. When you register an investment — via invoice upload, manual entry or PSD2 bank feed with your Belgian bank — the system automatically detects whether the asset qualifies and which percentage applies.

What FINEO does automatically:

- Categorises every fixed asset (base / increased / green) based on invoice content, supplier and category - Calculates the one-off deduction per investment using current 2026 rates - Generates annex 275.U for the corporate tax return - Tracks whether increased deductions require a regional or federal certificate, and sends reminders - Records carry-forward balances automatically and applies them in subsequent financial years - Surfaces in the Advice Centre which planned investments yield the highest investment-deduction return if completed now - Compares one-off vs spread for R&D and energy and proposes the more advantageous route

The company only needs to register the investment and approve a category proposal. The corporate tax return is automatically pre-filled with all deductions in box 90 and the corresponding annex 275.U.