Business tax

What corporate-tax rate structures exist?

Corporate income tax structures fall into four broad families. Flat-rate frameworks apply a single rate regardless of profit level: US federal 21 percent under IRC §11 since 2018 [SC1]; Sweden 20.6 percent; Denmark 22 percent; Norway 22 percent (with petroleum-sector surtax); Switzerland federal 8.5 percent on after-tax (with cantonal-and-communal layers producing combined effective 12–22 percent by canton). Two-tier frameworks apply a reduced rate up to a profit threshold and a standard rate above: Netherlands 19/25.8 percent at EUR 200,000; Hong Kong 8.25/16.5 percent at HKD 2 million; Spain reduced 23 percent for micro-companies (turnover under EUR 1m) on first EUR 50,000. Multi-tier progressive frameworks apply graduated rates: Korea 9/19/21/24 percent across KRW 200m / 20bn / 300bn breakpoints; Argentina 25/30/35 percent tied to accumulated profits inflation-indexed. Federation-with-state-or-provincial-overlay frameworks apply a federal rate plus subnational rates: Canada federal 15 percent (9 percent CCPC SBD on first CAD 500,000) plus provincial rates totalling combined 23–31 percent; Germany 15 percent + 5.5 percent Soli + Gewerbesteuer (3.5 percent × municipal Hebesatz 200–580 percent) producing combined 28–33 percent; Switzerland three-tier as above; US federal 21 percent + state corporate-tax rates 0–11.5 percent producing combined 21–28 percent.

How are entity types differentiated?

Most jurisdictions distinguish at least four entity types for tax purposes: (i) sole-proprietor / unincorporated trader (taxed as part of the individual's personal return); (ii) partnership (typically taxed at partner level under pass-through treatment with the partnership filing an information return); (iii) limited liability company / LLC (variable treatment — classified as partnership, S-corp, or C-corp in the US; SARL/SAS in France; GmbH in Germany; Pte Ltd in Singapore; with some jurisdictions giving LLC-equivalent entities a flat character); (iv) C-corp / public-or-private corporation (taxed at entity level under the corporate-income-tax regime, with separate dividend-level taxation on shareholder distributions — the classical double-tax framework, modified by integration mechanisms in some jurisdictions). The US distinction between C-corp and S-corp is the most consequential entity-choice in the US framework: an S-corp passes income through to shareholders' personal returns and avoids the corporate-level tax; a C-corp pays the 21 percent federal corporate rate plus dividend-level personal tax on distributions. The UK's small-private-limited-company regime, France's SARL versus SAS distinction, and Germany's GmbH versus Aktiengesellschaft distinction are the principal European parallels.

How does Pillar Two interact with corporate-tax rates?

The OECD Pillar Two Global Anti-Base Erosion (GloBE) framework, agreed in October 2021 and progressively implemented from 2024 onwards, applies a 15 percent minimum effective tax rate to in-scope multinational groups with consolidated revenue above EUR 750 million [SC7]. The framework operates through three principal mechanisms: (i) the Income Inclusion Rule (IIR), under which the parent jurisdiction tops up to 15 percent on low-taxed foreign subsidiaries' income; (ii) the Undertaxed Profits Rule (UTPR), which back-stops the IIR for jurisdictions that have not implemented it; (iii) the Qualified Domestic Minimum Top-up Tax (QDMTT), which lets the source jurisdiction collect the top-up rather than ceding it to a foreign parent. Implementation timelines: EU member states under Directive 2022/2523 from 31 December 2023 (IIR) / 31 December 2024 (UTPR); UK, Canada, Australia, South Korea, Japan, Switzerland, Norway from fiscal years beginning on or after 1 January 2024; New Zealand and Hong Kong from 1 January 2025; UAE Domestic Minimum Top-up Tax from 1 January 2025; Singapore from 1 January 2025; Israel deferred to 1 January 2026. The US has not implemented Pillar Two as of the most recent legislative cycle — the GILTI and BEAT regimes operate as alternative minimum-tax mechanisms for US-parented groups but are not Pillar-Two-compliant; foreign-parented groups with US subsidiaries face the foreign-jurisdiction's IIR/UTPR.

What deductions and credits typically apply?

Corporate tax deductions across jurisdictions follow common categories: (i) ordinary-and-necessary business expenses (the basic principle); (ii) depreciation and capital allowances on tangible assets (with jurisdiction-specific schedules — US MACRS, UK capital allowances, Australia simplified depreciation rules, Germany AfA); (iii) interest expense subject to thin-capitalisation rules (the EU ATAD 30 percent of EBITDA cap, or comparable national rules); (iv) intra-group payments subject to transfer-pricing arm's-length-principle review; (v) loss carry-forward and carry-back with jurisdiction-specific time limits (US 80 percent of taxable income post-TCJA, UK 5-year carry-forward of trading losses with 50 percent restriction above GBP 5m profits, France progressive use rules); (vi) R&D incentives — US Research Credit under IRC §41 (15-percent base + 14-percent ASC alternative), UK R&D Expenditure Credit at 20 percent (post-2024 merged regime) plus Enhanced R&D Intensive Support for loss-making R&D-intensive SMEs, Italy 110 percent enhanced deduction under Patent Box, France Crédit d'impôt recherche (CIR) at 30 percent / 5 percent; (vii) participation exemption regimes that exempt qualifying intra-group dividends and capital gains (Netherlands deelnemingsvrijstelling, Germany Schachtelprivileg, Sweden, Belgium RDT/DBI, Spain section 21 IS Law).

How do small-business / SME regimes work?

Most jurisdictions operate dedicated small-business or SME regimes that reduce effective rates for qualifying smaller corporations. US: no separate small-business corporate rate, but the QBI deduction (20 percent of qualified business income for pass-through filers) under IRC §199A operates as a parallel mechanism that reduces effective rates on pass-through income up to specified thresholds. UK: Small Profits Rate of 19 percent on first GBP 50,000 with marginal relief tapering to the 25 percent main rate above GBP 250,000 [SC2]. Canada: Small Business Deduction reduces federal rate to 9 percent on first CAD 500,000 of CCPC active business income, subject to passive-investment-income clawback above CAD 50,000. Australia: Base Rate Entity rate of 25 percent for companies with turnover under AUD 50 million and passive income at 80 percent or less of assessable income (versus 30 percent standard rate). France: reduced 15 percent on first EUR 42,500 for SMEs with turnover under EUR 10m. Germany: no separate small-corporate rate, but a partial business-trade-tax relief mechanism for personal-business owners through section 35 EStG. Italy: regime forfettario for sole-traders (15 percent flat or 5 percent for new activities) — note this is a personal-tax regime, not a corporate one. Spain: post-2025 multi-year reduction trajectory toward 20 percent for micro-companies (turnover under EUR 1m) by 2029. Singapore: Partial Tax Exemption (75 percent of first SGD 10,000 + 50 percent of next SGD 190,000 exempt for all companies); Start-Up Tax Exemption (75 percent of first SGD 100,000 + 50 percent of next SGD 100,000 in first three YAs). Korea: 9 percent on first KRW 200 million as the first-bracket-tier of the four-bracket structure. Malaysia: SMEs (paid-up capital ≤MYR 2.5m and gross income ≤MYR 50m) face graduated 15/17/24 percent at MYR 150k / 600k breakpoints.

How does multistate / multi-jurisdiction nexus work?

In federal jurisdictions, businesses operating across state-or-province lines face nexus issues — the threshold question of when a business has sufficient connection with a state-or-province to trigger that jurisdiction's tax-collection or income-tax-filing obligations. The US post-Wayfair (South Dakota v. Wayfair, Inc. 2018) economic-nexus framework allows states to impose sales-tax-collection obligations on out-of-state sellers exceeding economic-nexus thresholds (commonly USD 100,000 in sales or 200 transactions per year) without a physical-presence requirement [SC1]. State income-tax nexus operates under longer-standing rules including Public Law 86-272 protections for solicitation-only sellers of tangible personal property, increasingly narrowed by state-level interpretation post-2020. Apportionment formulas for income-tax nexus typically use a sales-factor-only or three-factor (sales/property/payroll) approach, with single-sales-factor adoption increasing across US states in recent years. Canada's federal-provincial corporate-tax structure handles inter-provincial allocation through a combined-payroll-and-revenue formula under the General Agreement on the Allocation of Taxable Income. Australia and Germany operate as essentially federal-only corporate-tax systems with state-level tax limited to payroll-tax (Australia) or trade-tax (Germany Gewerbesteuer with municipal-level rate variation rather than separate state-level corporate income tax).

How does the corporate-individual integration mechanism work?

Most developed economies operate some form of corporate-shareholder integration to mitigate the classical double-tax framework. Imputation systems (Australia, New Zealand, Mexico through the integrated dividend regime) attach a credit to dividends paid out of company-tax-paid profits, with shareholders crediting the imputation against their personal tax liability — Australia's franking-credit system is the global prototype. Half-rate / partial-inclusion systems include only a portion of dividend income in the shareholder's taxable income (Canada's gross-up-and-credit, Germany's Teileinkünfteverfahren at 60 percent inclusion). Reduced shareholder rate systems apply a separate, lower rate to dividend and capital-gain income at the shareholder level (US qualified-dividends at 0/15/20 percent LTCG-equivalent rates; France PFU 30 percent; UK 8.75/33.75/39.35 percent dividend-tax rates). One-tier exemption systems eliminate shareholder-level tax on dividends paid out of company-tax-paid profits (Singapore one-tier system; Hong Kong territorial absence of dividend tax for individuals; UAE post-CT framework). The choice among these models is the principal lever in dividend-tax-policy design and materially affects after-tax investment returns.

What transfer-pricing and CFC rules apply?

Most jurisdictions operate transfer-pricing rules requiring intra-group transactions to be priced on the arm's-length principle, mirroring OECD Transfer Pricing Guidelines. The US transfer-pricing regime under IRC §482 operates through documentation requirements, advance pricing agreements (APAs), and the IRS's Mutual Agreement Procedure (MAP) framework. The UK, EU member states, Canada, Australia, India, and most major economies have implemented OECD-aligned TP frameworks with Country-by-Country Reporting from 2017–18 onwards. Brazil moved to OECD-compatible arm's-length-principle rules through Lei 14.596/2023 from 1 January 2024 — a structural shift away from the prior Brazilian-specific fixed-margin methods. Controlled Foreign Company (CFC) regimes catch resident-shareholder-controlled foreign subsidiaries' undistributed income to prevent deferral: the US Subpart F regime under IRC §951–965 plus GILTI on global intangible low-taxed income; the EU Anti-Tax Avoidance Directive (ATAD) Models A and B implemented across EU member states; the UK CFC regime under TIOPA 2010 Part 9A; Australia's CFC framework under Part X ITAA 1936; India's section 115JC/MAT-AMT framework alongside specific CFC-equivalent provisions.