🧠 Calquify Intelligence
Germany's Ehegattensplitting (income splitting for married couples) provides the largest marriage tax benefit in Europe — up to approximately €15,000/year for a one-earner couple where the working spouse earns a high salary — but simultaneously creates a strong disincentive for the non-working spouse (typically women) to enter the labour market, which has been identified by economists and the OECD as a significant contributor to Germany's gender employment gap
Ehegattensplitting mechanics: married couples can elect to be assessed jointly (Zusammenveranlagung) — their combined income is halved, tax calculated on the half, then doubled. This shifts income from the higher bracket to the lower bracket. Example: couple with income €120,000 / €0: Joint: tax on €60,000 × 2 = approximately €23,000 total. Individual: tax on €120,000 approximately €44,000. Splitting benefit: approximately €21,000/year. Example with working spouse at lower income: €120,000 + €30,000 = €150,000 combined: Joint: tax on €75,000 × 2 = approximately €28,000. Individual: tax on €120,000 (€44,000) + tax on €30,000 (€6,000) = €50,000. Splitting benefit: approximately €22,000. The labour market disincentive: for the non-working spouse to work part-time at €20,000, their marginal contribution (tax on €20,000 at the family's marginal rate rather than their own rate) is much higher than if assessed individually. OECD analysis: Germany has the largest spousal tax penalty on second earners in the OECD — a secondary earner in Germany faces an effective marginal rate of approximately 60-70% on their first euro of earnings (due to the Ehegattensplitting benefit they sacrifice). This contributes to Germany's female labour force participation gap (approximately 6 percentage points below EU average).
Source: EStG §26 Ehegattensplitting; BMF Splittingtabelle 2026; OECD Taxing Wages 2025 German second earner analysis; IW Köln marriage tax Germany
The Netherlands' strictly individual income tax system — where each partner is taxed only on their own income regardless of marital status — means there is no marriage tax bonus or penalty for income tax purposes, making it one of Europe's most economically neutral tax systems regarding the decision to work or form a partnership
Dutch individual taxation: each Dutch tax resident is assessed individually for Box 1 (income from work), Box 2 (substantial interests), and Box 3 (savings and investments). Marriage or partnership (registered or informal partnership for tax purposes) does not shift income between partners. The only marriage-adjacent tax benefit: heffingskorting overdracht (transfer of tax credits): if one partner has too little income to use their general heffingskorting (€3,070 in 2026) and/or arbeidskorting, the unused portion can be transferred to the working partner — but this is being phased out (afbouwing) and will be fully eliminated by 2028. Box 3: partners together are assessed on joint Box 3 assets (savings, investments) — they can optimise how they split the heffingsvrij vermogen (exempt wealth) between them (€57,000 per person in 2026). The neutrality result: a Dutch couple where one earns €100,000 and the other €0 pays the same total income tax as two couples each earning €50,000 — the income splitting effect that benefits German couples does not apply. This makes the Netherlands' system neutral toward labour market participation of both partners.
Source: Wet IB 2001 Artikel 2.17 (partner system); Belastingdienst heffingskorting overdracht afbouw; OECD individual versus joint taxation; PwC Netherlands individual tax neutrality analysis
Switzerland's cantonal income splitting system creates one of Europe's most complex inter-cantonal marriage tax landscapes — where identical couples can face dramatically different marriage tax advantages depending on which canton they live in, and some cantons actually impose a 'marriage penalty' (Heiratsstrafe) where married couples pay MORE tax than two unmarried cohabiting individuals with the same income
Swiss Heiratsstrafe (marriage penalty): in cantons using a global income approach without proper splitting adjustment, married couples can pay more tax than cohabiting couples with the same income. Federal Supreme Court (Bundesgericht) ruling 2022: found that the Federal Government's failure to fully eliminate the marriage penalty at federal level was unconstitutional — ongoing reform. Federal level: Direkter Bundessteuer uses a splitting factor of 1.88 (not 2) for married couples — partial but not full splitting; creates a partial marriage penalty for dual-earner couples earning similar amounts. Canton variation: Zurich uses splitting with factor 2 (full) — marriage benefit for unequal earner couples, neutral for equal earners. Zug: simplified cantonal system; relatively neutral. Geneva: complex progressive formula; can create marriage penalty for similar-earning dual-income couples. The political dimension: married Swiss couples and family organisations have consistently lobbied for full splitting correction; the Federal Council has proposed several reforms that have not been fully implemented. For Swiss expats and relocating couples: the canton of residence can have a significant impact on total family income tax — inter-cantonal comparison before choosing residence location is essential planning.
Source: Bundesgericht ruling BGE 2022 Heiratsstrafe; Swiss Federal Council Steuerpaket reform; EFD Swiss federal tax splitting factor; Canton Zurich tax calculator married vs cohabiting
Annual Marriage Tax Saving — One Earner at €100k, Spouse €0 Income (€)
National tax authority calculations 2026
📋 Reference Data
Marriage Tax Benefit/Penalty — Country Comparison Q1 2026
National tax authority rates + OECD Taxing Wages 2025
| Country | System | One Earner (€100k/€0) | Equal Earners (€50k/€50k) | Effect on 2nd Earner | Notes |
|---|---|---|---|---|---|
| Germany | Joint splitting (÷2) | Large benefit about €15.000-21.000/year | Neutral (equal splitting) | Strong disincentive (high marginal rate on 2nd income) | EStG §26; Splittingvorteil; Steuerklasse III/V; OECD criticism for gender labour gap |
| France | Joint (quotient conjugal, 2 parts) | Moderate benefit | Neutral (2 parts for couple) | Moderate; children add further parts | Children increase benefit; cap applies; spouse share income |
| Switzerland (Zurich) | Splitting (factor 2) | Benefit for unequal earner | Neutral | Moderate disincentive | Cantonal; Zurich uses full factor 2; Federal level partial penalty possible |
| Belgium | Quotient conjugal (optional) | Benefit up to about €3.000 extra | Neutral or slight benefit | Some disincentive depending on option | 30% of lower income shifted to higher earner; maximum €11.850 |
| Luxembourg | Joint splitting option | Benefit for unequal earner | Neutral to slight benefit | Moderate disincentive | Class A (joint) vs Class B (individual); choose annually |
| Austria | Individual; heffingskorting transfer | No income splitting benefit | No benefit | Neutral | Individual assessment; Alleinverdienerfreibetrag for sole earner couples |
| Ireland | Standard rate band transfer | Partial benefit (€49.000→€73.600 combined band) | Slight benefit | Moderate; unused band transfers | Married couples can transfer unused standard rate band (€49.000 each → max €73.600) |
| Spain | Individual only (regional options vary) | No national splitting benefit | No benefit | Neutral (individual) | Declaración conjunta available but rarely better than individual |
| Italy | Individual taxation | No income splitting | No benefit | Neutral | Individual taxation; family credits for dependants |
| Portugal | Optional joint or individual | Modest benefit for unequal earner | Neutral to slight benefit | Moderate | Quociente conjugal applied if joint filing beneficial |
| Netherlands | Individual only | No income splitting benefit | No benefit | Neutral (most neutral EU system) | Heffingskorting transfer being phased out 2028 |
| United Kingdom | Individual only | No splitting benefit | No benefit | Neutral | GBP; individual taxation; married couple's allowance only legacy (born pre-1935) |
| Sweden | Individual only | No splitting benefit | No benefit | Most neutral EU system | Individual since 1971 reform; explicitly designed to promote female labour participation |
| Denmark | Individual only | No splitting benefit | No benefit | Neutral | Individual; no joint filing option; Denmark explicitly rejected Ehegattensplitting model |
| Norway | Individual only | No splitting benefit | No benefit | Neutral | Individual; class-based deductions abolished; fully individual since 2014 |
ⓘ All EUR de-DE except UK (GBP en-GB). 'One Earner (€100k/€0)' = couple where only one partner works at €100,000 gross, other has no income — this shows the maximum marriage tax benefit (where splitting is most advantageous). 'Equal Earners (€50k/€50k)' = couple both earning €50,000 — equal-income couples gain little or nothing from splitting systems. Countries with splitting: Germany, France, Switzerland (mostly), Belgium, Luxembourg, Portugal (optional). Countries with individual taxation: Netherlands, UK, Sweden, Denmark, Norway, Spain (mostly), Italy. Sweden deliberately moved to individual taxation in 1971 as a policy to promote female labour market participation — one of the first countries to make this policy link explicit. The OECD consistently identifies income splitting as a structural barrier to second-earner (predominantly female) labour market participation.
Germany Ehegattensplitting — Annual Tax Saving by Income Distribution
BMF Splittingtabelle 2026
| Partner A Income | Partner B Income | Tax Without Splitting | Tax With Splitting | Annual Saving | Effective Benefit Rate |
|---|---|---|---|---|---|
| €60.000 | €0 | about €16.900 | about €10.800 | about €6.100 | 10,2% of joint income |
| €80.000 | €0 | about €24.300 | about €15.400 | about €8.900 | 11,1% of joint income |
| €100.000 | €0 | about €32.700 | about €21.000 | about €11.700 | 11,7% of joint income |
| €120.000 | €0 | about €41.500 | about €27.000 | about €14.500 | 12,1% of joint income |
| €150.000 | €0 | about €55.500 | about €35.000 | about €20.500 | 13,7% of joint income |
| €100.000 | €30.000 | about €38.500 | about €27.000 | about €11.500 | 8,8% of joint income |
| €100.000 | €50.000 | about €42.600 | about €33.000 | about €9.600 | 6,4% of joint income |
| €80.000 | €60.000 | about €38.800 | about €33.000 | about €5.800 | 4,1% of joint income |
| €70.000 | €70.000 | about €38.800 | about €36.000 | about €2.800 | 2,0% of joint income |
| €80.000 | €80.000 | about €48.600 | about €48.600 | €0 | 0% — splitting neutral for equal earners |
ⓘ Tax calculations are approximate, including Solidaritätszuschlag (5.5% of income tax), excluding Kirchensteuer. Splitting benefit is maximised when the income disparity between partners is greatest — single-income couples (one works, one does not) receive the maximum benefit. Equal earner couples receive zero or near-zero benefit from splitting — the progressive rate advantage cancels out. The splitting benefit creates a strong financial incentive for the lower-earning partner (often the mother) to reduce working hours or exit employment entirely — the household loses the splitting benefit only proportionally, while keeping near-maximum benefit even when the lower earner works part-time. This is the mechanism economists identify as the 'Ehegattensplitting gender trap'.
🔗 Explore Related Intelligence
→
Tax Data
Income Tax Rates Netherlands 2026
Dutch income tax
→
Tax Data
Child Tax Credits Allowances Europe 2026
Child benefits
→
Tax Data
Marginal Tax Rate Traps Europe 2026
Tax rate traps
→
Tax Data
Tax-Free Allowances Europe 2026
Personal allowances
🔬 Methodology & Sources
Married vs Single Tax Methodology
European countries fall into three categories: (1) Individual taxation — each spouse taxed independently on own income regardless of marital status (Netherlands, UK, Sweden, Denmark); (2) Joint filing with splitting — combined income divided by 2 (or other factor) to determine rate (Germany Ehegattensplitting, France quotient conjugal, Switzerland); (3) Optional joint filing — can choose individual or joint depending on which is more beneficial (Belgium, Luxembourg). The benefit of splitting is largest when one partner earns significantly more than the other — the higher earner's income is notionally shifted to the lower bracket. All EUR de-DE; UK GBP en-GB.
Formula
Splitting_benefit = tax(A+B) - 2×tax((A+B)/2) | NL: no splitting benefit | DE_splitting = tax(combined/2)×2 vs tax(A)+tax(B) | Marriage_penalty = tax_married > tax_single (rare in EU; occurs when both earn similar high incomes in some systems)
CitationBMF Ehegattensplitting EStG §26; OECD Taxing Wages; DGFIP France barème quotient; Belastingdienst partner heffingskorting.
❓ Frequently Asked Questions
Yes — Germany's Ehegattensplitting (income splitting for married couples) can provide very significant tax savings, especially for couples with unequal incomes. How it works: married couples can file a joint tax return where their combined income is halved, tax calculated on the half, then doubled. This shifts the higher earner's income into lower tax brackets. At €100,000 / €0 income split: joint filing saves approximately €11,700/year versus individual filing. At €120,000 / €0: saves approximately €14,500/year. The more unequal the incomes, the larger the benefit. Couples with similar incomes (€70,000 / €70,000) gain near-zero splitting benefit. To use the maximum withholding advantage during the year: the higher earner takes Steuerklasse III (low monthly withholding) and the lower earner takes Steuerklasse V (high monthly withholding); the annual settlement squares the final position.
No — the Netherlands uses strictly individual income tax. Each partner is taxed only on their own income, regardless of whether they are married, registered as tax partners, or cohabiting. Marriage does not shift income between partners for income tax purposes. The only family-related income tax benefit: if one partner earns too little to fully use their heffingskorting (general tax credit, €3,070 in 2026), the unused portion can be transferred to the working partner — but this is being phased out and will disappear entirely by 2028. Box 3 (savings and investments): partners are assessed jointly on combined Box 3 assets but can optimise the allocation of the exempt threshold (€57,000 per person) between them. The Netherlands deliberately uses individual taxation to maximise labour market participation neutrality — no disincentive for either partner to work.
A marriage tax penalty occurs when a married couple pays MORE income tax than two unmarried individuals with the same incomes would pay. It happens most commonly in countries with joint filing systems when both partners earn similar incomes — because adding their incomes together pushes them into higher brackets, while individual filing would keep both in lower brackets. Switzerland: some cantons and the Federal level impose a partial marriage penalty for equal-earning dual-income couples — the Bundesgericht has ruled this unconstitutional but reform is incomplete. United States: the US marriage penalty affects some high-income dual-earner couples (not European but notable internationally). Most EU countries: individual taxation (Netherlands, UK, Sweden) avoids the marriage penalty by design; joint-filing countries (Germany, France) typically include splitting mechanisms that avoid penalties for most configurations but can create penalties for equal earners in some cases. The opposite (marriage bonus): Germany's Ehegattensplitting always provides a bonus for unequal earner couples — the larger the income disparity, the larger the bonus.
France uses a quotient familial system where each household is assigned a number of 'parts' for income tax calculation. Married couples and PACS partners receive 2 parts (1 per person versus 1 part for a single person). Income tax calculation: divide total household income by number of parts to find the per-part income; calculate tax on per-part income using the progressive rate scale; multiply back by number of parts for total tax. The 2-part system for couples effectively averages the couple's income — beneficial for unequal earner couples (brings high earner's income into lower brackets via averaging). Children add 0.5 parts each (third and subsequent children add 1 part). Cap: the benefit per additional half-part is capped at approximately €1,678 — limiting the advantage for very high-income households. For couples without children where both earn the same income: the quotient conjugal provides no benefit (averaging equal incomes doesn't change rates). For couples with one high earner: significant benefit, similar in principle to German Ehegattensplitting but with a lower cap.
Germany is by far the most advantageous European country for single-income married couples (one earner, one non-working spouse). The Ehegattensplitting can save up to €21,000+/year for couples where one partner earns a very high salary and the other has no income. At €100,000/€0: approximately €11,700/year saving. France is second, with the quotient conjugal providing savings (capped), particularly for couples with children. Switzerland (depending on canton) and Belgium offer moderate benefits. Netherlands, UK, Sweden, Denmark, Norway offer no marriage income tax benefit at all — individual taxation throughout. The German saving is so large that it creates a genuine disincentive for the non-working spouse to enter employment — the household often loses more in Ehegattensplitting benefit than the lower-earning partner would gain in net salary from a part-time job. This is the 'Ehegattensplitting gender trap' that feminist economists and OECD have repeatedly identified as a barrier to female employment in Germany.
Sources & References
Data sourced from official institutional publications. Results are for informational purposes only. Last reviewed Jan 2026.
Data Disclaimer
Married tax benefits depend on income levels, filing choices, and individual circumstances. The savings shown are illustrative for specific income distributions. Always calculate your specific position with a tax adviser.
Married tax benefits depend on income levels, filing choices, and individual circumstances. The savings shown are illustrative for specific income distributions. Always calculate your specific position with a tax adviser.