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The traditional 'balance sheet' expat package (home salary + all allowances) is declining — companies are moving to local-plus or local market packages as the expat population normalises and remote work reduces relocation necessity
The traditional expat package — maintaining home country salary, adding cost-of-living adjustment, housing allowance, school fees, home leave, and tax equalisation — made economic sense when international assignees were rare specialists moving to genuinely different cost environments. Three structural changes are reducing this model: (1) remote/hybrid work has made many roles location-flexible, reducing physical relocation needs; (2) the global normalisation of professional labour markets means many host-country nationals can do the work at local salaries; (3) cost consciousness post-COVID has driven HR functions to challenge legacy expat packages. ECA International estimates the proportion of companies using 'local' or 'local-plus' packages for long-term assignments rose from approximately 25% (2018) to approximately 45% (2025). However, genuinely challenging locations (Sub-Saharan Africa, Central Asia, certain Middle East postings) still command traditional packages.
Source: ECA International Assignment Cost Survey 2025; Mercer Worldwide Benefit and Employment Guidelines; WTW Global Mobility Trends 2025
The Netherlands 30% ruling — which allows incoming highly skilled migrants to receive 30% of salary tax-free for up to 5 years — is one of Europe's most valuable expat tax benefits but was significantly restricted from 2024
The Dutch 30% ruling (30%-regeling) allows employers to pay qualifying incoming employees 30% of their salary as a tax-free expense allowance for up to 5 years. For a senior professional earning €150,000/year gross: 30% = €45,000 tax-free, saving approximately €18,000-20,000 in income tax annually. This made the Netherlands extremely attractive for international talent — Amsterdam became a primary choice for US and UK companies establishing European operations post-Brexit (Booking.com, Uber, Netflix). However, from 2024, the government capped the 30% ruling at the 'Balkenende norm' (approximately €233,000 salary threshold) and announced progressive reduction from 30% to 10% over 5 years (30% → 20% → 10%). These restrictions significantly reduced the attractiveness for high earners.
Source: Belastingdienst 30% ruling guidance 2025; Amsterdam law firms expat tax briefings 2025; ECA Netherlands assignment costs
African diaspora expats returning to Nigeria, Ghana, or Kenya on international packages command premiums of 150-300% over local salaries — creating a two-tier professional market in major African cities
European and American companies deploying expats to African markets — or African professionals returning from European assignments — typically receive packages calibrated to home-country salary levels, creating dramatic salary disparities within the same office. A Nigerian professional returning from London on a British company assignment package may earn 5-10× the local market rate for equivalent seniority. In Lagos, for example: local market rate for a senior manager in finance might be NGN 15-25 million/year (approximately €8,000-13,000); an expatriate in the same role on a 'balance sheet' package might receive the equivalent of €60,000-100,000 (base) plus housing allowance, school fees, and other benefits. This two-tier system creates resentment, retention challenges for local talent, and governance questions about equity. Companies are increasingly under pressure to 'localise' — transitioning returning diaspora to competitive local packages.
Source: ECA International African assignment costs; Mercer Nigeria cost of living; PwC Africa expat remuneration survey 2025
Typical Expat Total Package Cost as Multiple of Base Salary — by Assignment Type
Mercer + ECA International 2025
📋 Reference Data
Expat Package Components — Typical Structure by Assignment Type 2025
Mercer + ECA International + WTW 2025
| Component | Short-Term (<1yr) | Long-Term (1-5yr) | Local-Plus | Notes |
|---|---|---|---|---|
| Base salary | Home rate maintained | Home rate or host rate | Host market rate | Balance sheet vs host approach |
| Mobility/assignment premium | 5–15% of base | 10–20% of base | 5–10% | Incentive to relocate; hardship-linked |
| Cost-of-living adjustment (COLA) | Full differential | Full differential | Partial or none | Mercer COLA index — city vs city |
| Housing allowance | Full company-provided or allowance | £2.500–£5.000/mo (London) | Partial contribution | Most expensive element for popular cities |
| School fees (children) | Paid in full | Paid in full — international school | Not typically included | €15.000–€40.000/yr per child in EU |
| Home leave flights | Monthly (short-term) | 2–4 flights/yr | Not typically included | Economy for long-haul; business for senior |
| Tax equalisation | Full — employer pays difference | Full equalisation | Not typically included | Ensures neither gain nor loss from tax |
| Settling-in allowance | One-off €2.000–€5.000 | One-off €5.000–€15.000 | Not typically included | Moving, set-up, first month |
| Language/cultural training | Often included | Often included | Sometimes | Particularly for non-English destinations |
| Spouse/partner support | Career counselling | Career counselling + allowance | Not typically included | Spousal career disruption — major assignee concern |
ⓘ Total employer cost of a traditional long-term expat assignment is typically 2-2.5× the base salary cost of an equivalent local hire. For a senior manager at €150,000 base: total assignment cost approximately €300,000-375,000/year. School fees alone (2 children at international school) add €30,000-80,000/year. This is why companies are increasingly scrutinising the ROI of traditional expat packages and moving toward local-plus or local market approaches. Tax equalisation ensures the assignee pays neither more nor less tax than they would at home — the employer absorbs any differential.
Expat Cost-of-Living Premium by City — Europe 2025 (Mercer COLA Index)
Mercer Cost of Living Survey 2025
| City | Mercer COLA Rank (global) | vs New York baseline | Typical Housing (1-bed, expat standard) | School Fees (international, /yr) | Notes |
|---|---|---|---|---|---|
| Zurich | 1st globally | + 8% vs NYC | CHF 3.500–5.500/mo | CHF 25.000–45.000 | Most expensive city globally for expats 2025 |
| Geneva | 3rd globally | + 5% vs NYC | CHF 3.200–5.000/mo | CHF 22.000–40.000 | International orgs drive demand |
| London | 17th globally | - 5% vs NYC | £3.000–5.500/mo | £20.000–40.000 | High absolute cost; post-Brexit FX reduces for USD earners |
| Copenhagen | 22nd globally | - 8% vs NYC | DKK 15.000–25.000/mo | DKK 80.000–150.000 | Scandinavian premium; low crime compensates |
| Oslo | 25th globally | - 10% vs NYC | NOK 20.000–35.000/mo | NOK 120.000–200.000 | High absolute; oil sector expats common |
| Amsterdam | 28th globally | - 12% vs NYC | €2.200–3.800/mo | €15.000–30.000 | Post-Brexit expat surge pushed rents very high |
| Paris | 34th globally | - 15% vs NYC | €2.500–4.500/mo | €15.000–35.000 | Strong demand from luxury/finance sector |
| Frankfurt | 42nd globally | - 18% vs NYC | €2.000–3.500/mo | €15.000–28.000 | Financial centre; ECB/bank expat population |
| Brussels | 51st globally | - 22% vs NYC | €1.800–3.200/mo | €15.000–30.000 | EU institutions expat community; relatively affordable |
| Dublin | 38th globally | - 16% vs NYC | €2.000–3.500/mo | €10.000–25.000 | Tech FDI expat community; housing crisis affects |
| Madrid | 62nd globally | - 28% vs NYC | €1.500–2.800/mo | €10.000–20.000 | More affordable than NW Europe; growing expat community |
| Warsaw | 89th globally | - 42% vs NYC | €800–1.500/mo | €8.000–15.000 | Cheapest major EU city for expats; rapidly rising |
ⓘ Mercer COLA ranks cities by cost basket for expats (housing, food, transport, utilities, entertainment at expat standard). New York = 100 baseline. Zurich is consistently ranked the world's most expensive city for expatriates. Warsaw shows the most rapid cost increase — rising approximately 25 positions over 5 years as Poland's economy modernises. School fees at international schools (IB curriculum) vary enormously — typically €15,000-40,000/year per child in Western Europe, making children a major driver of total assignment costs.
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🔬 Methodology & Sources
Expat Salary Premium Data
Expat compensation consists of: base salary (home country or host country basis); mobility/assignment premium (typically 10-20% of base); cost-of-living adjustment (COLA) — differential between home and host location; housing allowance; children's education allowance; home leave flights; tax equalisation. Total package can be 150-300% of base salary for challenging assignments. All EUR figures de-DE locale.
Formula
Total_expat_cost = Base + Mobility_premium + COLA + Housing + Education + Tax_gross_up | Effective_premium = (Total_cost / Equivalent_local_hire) × 100
CitationMercer International Assignments 2025; ECA international assignment cost benchmarks; ORC worldwide assignment policies.
❓ Frequently Asked Questions
An expat salary premium (also called mobility premium or assignment premium) is an additional payment — typically 10-20% of base salary — paid to employees who relocate internationally for work. It compensates for the disruption of moving, leaving social networks, and taking on assignment-related risks. Hardship premiums (0-25% of base) are additional payments for difficult or dangerous locations. On top of the premium, traditional expat packages include cost-of-living adjustments, housing allowances, school fees, home leave flights, and tax equalisation — bringing total employer cost to typically 2-2.5× the base salary.
The Dutch 30%-regeling allows qualifying incoming highly skilled migrants to receive 30% of their salary as a tax-free expense allowance for up to 5 years. To qualify: must be recruited from abroad; must have specific expertise scarce in the Netherlands; must earn above a salary threshold (€46,107 in 2025; lower for under-30s with master's degree). The tax-free 30% represents a significant net pay benefit — for someone earning €120,000/year, the saving is approximately €13,000-15,000/year in income tax. From 2024, the ruling was capped and will be progressively reduced from 30% to 10% over the 5-year period under new coalition legislation.
Zurich ranks as the world's most expensive city for expatriates (Mercer Cost of Living Survey 2025) — driven by housing (1-bed expat standard CHF 3,500-5,500/month), food prices (50-70% above EU average), and international school fees (CHF 25,000-45,000/year per child). Geneva is close behind (3rd globally). Within the EU, Copenhagen, Oslo, Amsterdam, Paris, and Dublin are the most expensive for expatriates. Warsaw is the most affordable major EU city but rising rapidly. For assignments to London, international school fees (£20,000-40,000/year) and housing (£3,000-5,500/month at expat standard) are the dominant cost drivers.
A local-plus package pays the assignee at the host country local market rate (unlike traditional packages which maintain home country salary) but adds selected expatriate benefits — typically: housing contribution; school fees; one or two home leave flights per year. It sits between a traditional expat package (full balance sheet approach) and a pure local contract. Local-plus packages are increasingly popular as companies seek to reduce assignment costs while remaining competitive for international talent. They work well for intra-European assignments where salary levels are broadly comparable, but less well for moves from high-cost to low-cost countries where a local package would represent a significant pay cut.
African assignments typically command the highest total premiums in European multinational packages. Hardship allowances of 15-25% of base are common for Nigeria (Lagos, Abuja), Angola, DRC, Cameroon, and similar markets. Housing allowances are high — secure expat compound housing in Lagos is approximately USD 3,000-8,000/month. Security arrangements (driver, guard) add further costs. School fees at international schools (ISL, American International School) in Lagos or Accra: approximately USD 15,000-35,000/year. Many companies calculate a 'total assignment cost' of 3-4× base salary for West African assignments. The diaspora dimension — African professionals returning on European packages — creates complex equity questions within local organisations.
Sources & References
Data sourced from official institutional publications. Results are for informational purposes only. Last reviewed Jan 2026.
Data Disclaimer
Expat salary data is highly variable by employer, sector, assignment type, and individual negotiation. Figures are indicative benchmarks from HR consultancy surveys.
Expat salary data is highly variable by employer, sector, assignment type, and individual negotiation. Figures are indicative benchmarks from HR consultancy surveys.