Global Tax Planning in the Wake of OECD’s 2026 Reforms

Key Reform Trends from OECD’s Report

• Capital Income Taxation Tightens: Belgium introduced a new flat capital gains tax with an exemption tier; Japan cut deductions for extremely high incomes and raised minimum effective rates for capital income (oecd.org).
• Exemptions and Incentives Tailored: Many countries widened credits for R&D, start-ups, or specific sectors; Belgium, Finland, and others expanded non-resident / expat regimes to attract talent (oecd.org).
• Base Broadening over Rate Cuts: Most jurisdictions focused on reducing deductions/exemptions rather than lowering rates. Tax thresholds were not adjusted to inflation in some places, creating fiscal drag and incremental tax burden. (oecd.org)

Planning Takeaways for Global Investors & High-Net-Worth Individuals

1. Reassess your investment domicile: Capital gains, dividends, carried interest rules vary: Belgium’s capital gains tax, Japan’s minima, and deferments or exemptions for certain sectors. If you’re holding financial assets abroad, the withholding and effective rates may rise.
2. Use treaty and regime benefits wisely: If eligible for expat or key employee regimes (e.g. Belgium, Finland), evaluate whether residence or non-residence status offers advantages—especially with higher rates on non-qualified incomes.
3. Align timing of income realisation: Where possible, structure realised gains or distributions in a year when favorable deductions or credit carryovers exist beneath newly tightened capital income rules.
4. Plan for inflation drift: In countries freezing PIT thresholds (e.g. UK through to 2031), ordinary inflation will increase your PIT burden. Proactive planning (e.g. timing expenses or deferring income when possible) can help.

Practical Example

Say you’re a global tech entrepreneur earning dividends and capital gains. Under reforms:

• If Belgium: dividends get flat tax, capital gains taxed unless under EUR 10,000 or depending on shareholding size.
• If Japan: your deductions shrink, effective minimum tax jumps to 30%.
• If UK: dividend/savings tax rates hike by ~2 pp from April 2027. So, delay or accelerate certain sales/distributions depending on where you expect to be resident or where your entity is tax resident.

Action steps:

• Map your incomes by type and jurisdiction.
• Use entities or trusts in places with favorable withholding rates or treaty access.
• Revisit tax-loss carryforwards or deferred gains now before regimes tighten.

Global tax planning in 2026 must balance rising revenue needs with emerging incentive regimes. Adaptation—not avoidance—is the name of the game.