Cost of Living Comparison for Internationally Mobile Individuals

Standard cost of living comparisons are a useful starting point, but for the internationally mobile individual they are often dangerously incomplete. The consumer basket that Numbeo or Mercer uses to rank cities typically covers groceries, restaurant meals, local transport, and city-average rents. It does not include the costs that define an expat lifestyle: international school fees, private medical insurance, club memberships, and the periodic cost of flights home.

Understanding the true comparative cost of living across locations — and translating it into a rigorous personal financial plan — is a core element of expat financial planning.

The Main Data Sources

Three organisations dominate the global cost of living measurement landscape, and each measures something slightly different.

Numbeo is a crowd-sourced database of consumer prices across cities worldwide. It is freely accessible, updated continuously, and covers thousands of cities. It is useful for quick comparisons of groceries, restaurants, and local transport. Its limitation is that it reflects the prices available to local residents, not necessarily the prices paid by expat households.

Mercer Cost of Living Survey is designed for multinational employers calculating expatriate compensation packages. It measures the cost of a basket of goods and services specifically relevant to expat employees — focusing on the international shops, international-standard restaurants, and housing typical of an expatriate lifestyle. It is more relevant to expat financial planning than Numbeo, but it is subscription-based and its basket still excludes schooling and medical insurance.

ECA International provides similar employer-focused benchmarks, particularly for housing and goods cost comparisons, and is widely used by global mobility teams at large corporations.

For individual financial planning purposes, these indices are a useful starting framework — but they must be supplemented with your specific circumstances.

Major City Comparison: London as the Baseline

The following comparison uses London as 100 and provides approximate ranges for consumer basket costs (excluding school fees, international medical insurance, and major lifestyle adjustments). These are illustrative approximations based on 2026 data and should be treated as directional rather than precise.

City	Approximate Index (London = 100)
Zurich / Geneva	115–130
New York	100–115
London	100
Singapore	75–90
Hong Kong	85–95
Paris	80–90
Sydney	75–88
Tokyo	65–78
Dubai	60–75
Barcelona	58–70
Lisbon	52–65
Athens / Cyprus	48–62
Bangkok	30–42
Bali	25–38

These ranges reflect typical expatriate consumer baskets and will vary substantially depending on lifestyle choices, whether you rent or own, and how much you adapt to local consumption patterns rather than maintaining a fully expatriate lifestyle.

The Costs Indices Do Not Capture

International school fees. If you have school-age children and wish to maintain continuity of education (or simply access a strong English-language curriculum), international schools are the primary option in most expatriate destinations. Annual fees range from approximately £12,000 per child at modest international schools in Southeast Asia to £35,000 or more per child at premium IB schools in Singapore, Hong Kong, or Dubai. This cost is not included in any standard cost of living index, yet for a family with two children, it can add £25,000–70,000 per year to the budget.

International private medical insurance (IPMI). Most expatriate destinations do not offer high-quality public healthcare accessible to non-residents on the same basis as local citizens. A comprehensive international private medical insurance policy covering worldwide treatment (including return to the UK or another high-quality healthcare hub for specialist care) costs approximately £3,000–6,000 per year per person for a healthy individual in their 30s or 40s, rising to £10,000–20,000 or more for individuals in their 50s and 60s, particularly those with pre-existing conditions. Again, this is absent from standard indices.

Home visits. Most expatriates travel back to their home country at least once or twice a year. Business class flights between London and Singapore, for example, cost £3,000–8,000 per return trip. A family of four visiting the UK twice a year represents a significant ongoing travel budget not captured in consumer price comparisons.

Shipping and relocation. The upfront cost of international relocation — shipping household contents, vehicle import duties, temporary accommodation during transition — is typically £10,000–50,000 for a full family move. This is a one-off cost but should be included in the financial planning for any move.

Housing in the transition period. Most expatriate destinations require a minimum deposit (often three to six months' rent) on arrival. Furnished accommodation in an expatriate-friendly location in Singapore, for example, can cost £3,500–8,000 per month for a family-sized apartment, with prices at the higher end in premium districts.

The Lifestyle-Equivalent Adjustment

Indices compare your cost in the new city to your cost in the old city for the same consumer basket. But this may not be the most useful comparison.

The question for many expatriates is not "what does my current London lifestyle cost in Bangkok?" but rather "what does an equivalent quality of life — a large apartment, good schooling, good restaurants, holidays — cost in Bangkok compared to London?"

This lifestyle-equivalent comparison often narrows the gap. In Bangkok, an equivalent quality of life to a good London household — large serviced apartment in a premium district, membership at an international gym and club, regular dining at good restaurants, international school fees for two children — might cost £75,000–100,000 per year. This is meaningfully cheaper than a comparable London lifestyle (perhaps £150,000–200,000 per year) but not as dramatically different as a simple index comparison might suggest.

For some locations the gap is more dramatic. Living to a high standard in Cyprus — a comfortable villa, good private medical care, occasional fine dining, regular flights back to the UK — can be achieved for £50,000–70,000 per year, genuinely representing a significant reduction from UK costs even for high-quality living.

The Property Dimension

Standard cost of living indices assume you rent housing. If you own a property in your destination city — particularly one you own outright — your effective cost of living is substantially lower than the index implies.

Many of our clients moving to Cyprus, Portugal, Spain, or Thailand over the age of 50 purchase a property outright (sometimes selling a UK property to fund this) and eliminate a housing cost that would otherwise be their largest single expense. In this scenario, the "cost of living" comparison becomes very different: you may be comparing a £0/month housing cost in Cyprus against a £3,500/month rent equivalent in London, a saving of £42,000 per year from housing alone.

This is a compelling element of the investment property case in lower-cost destinations: you reduce the cost of living comparison in your favour permanently, not just while the property market is favourable.

Taxes and Net Cost of Living

Cost of living comparisons typically compare gross costs — before tax implications of your new location. But your net cost of living depends heavily on your tax position in the destination country.

Portugal's Non-Habitual Resident (NHR) regime, for example, historically offered significant tax advantages for new residents over a 10-year period, reducing the effective cost of living further. The classic NHR regime closed to new applicants from 2024 and has been replaced by a narrower incentive (the IFICI regime, sometimes called "NHR 2.0") focused on certain high-value and scientific roles, so new arrivals should check current eligibility. Cyprus's 60-day rule and non-dom regime can reduce the effective tax rate on overseas income significantly. Dubai's absence of income tax and capital gains tax means that gross and net costs are effectively the same — a major factor for high earners.

Any honest cost of living comparison for an internationally mobile individual should incorporate the after-tax income available in the destination country, not merely the pre-tax gross costs.

Building Your Personal Cost of Living Budget

Rather than relying on aggregate indices, we recommend building a bottom-up personal budget for any potential new location. The framework:

1. Housing: research actual rents or purchase prices in the specific area you intend to live, for the type of property you require.
2. Schooling: if applicable, identify which international school(s) you would use and obtain current fee schedules.
3. Healthcare: obtain quotes for international private medical insurance for your family from two or three providers.
4. Food and household: estimate based on your consumption patterns (index data is useful here as a starting point).
5. Transport: research local transport options and whether you would own a vehicle.
6. Lifestyle: estimate your spending on restaurants, leisure, fitness, entertainment.
7. Travel: add return flights to your home country multiplied by the frequency you expect to visit.
8. Remittances and home country costs: include any costs you maintain in your home country — property maintenance, continuing insurance policies, professional subscriptions.
9. Tax: model the after-tax income you would have in the new location.

This bottom-up approach will give you a personal cost of living budget that reflects your actual circumstances, not an average of other people's consumption.

Planning Implications

The cost of living comparison is one input into a broader financial independence calculation. The question is not merely whether your costs are lower, but whether your income — from investments, pensions, rental property, business activity — is sufficient to sustain your desired lifestyle in the destination country for your planning horizon (often 30 to 40 years for someone retiring at 55 to 60).

A lower cost of living destination can meaningfully extend the life of a retirement portfolio, reduce the sustainable withdrawal rate required, and bring forward the point of financial independence. Conversely, if the destination country requires a large upfront purchase (property) or generates unexpected costs (schooling, medical), the benefit can be partly offset.

Cash flow modelling tools used by financial planners can model these scenarios in detail, including assumptions about local inflation (which may differ from UK inflation), currency risk (your costs may be in local currency but your assets in sterling), and longevity assumptions appropriate to your health and family history.

How Global Investments Can Help

At Global Investments, we work with internationally mobile clients to build rigorous cost of living analyses for specific destination countries, incorporating the full range of expat-specific costs that aggregate indices miss. Our advisers can run cash flow models comparing your financial position in different scenarios — remaining in the UK, retiring to Cyprus, moving to Spain, splitting time between locations — to give you a clear picture of what each option means for your financial security over the long term. We also help clients integrate property purchase in the destination country into the broader financial plan, and connect them with local advisers for destination-specific tax and legal guidance. Speak with our team to build a personalised analysis for your situation.