Exchange Rates, Purchasing Power and Cost of Living: What Changes When You Move Countries
A currency converter can tell you what €2,000 is worth in Canadian dollars today. It cannot tell you what €2,000 buys in Madrid, how that compares with Toronto, or whether the exchange rate will still be the same when you move.
Market exchange rates and cost of living answer different questions
A market exchange rate is the price of one currency in terms of another. The European Central Bank’s euro reference rates are set through a daily concertation procedure between central banks across Europe and are normally published around 16:00 CET on working days. The ECB publishes them for information purposes and discourages using them as transaction rates; the rate you actually receive can differ.
Cost of living asks what goods and services cost where you live. Those local prices do not mechanically move one-for-one with the daily FX rate. That is why Compare Living Cost keeps local-currency values as the canonical evidence and treats converted display currency as a separate layer.
Purchasing power parity is designed for price-level comparison
The OECD defines purchasing power parities (PPPs) as currency-conversion rates that equalize purchasing power by eliminating differences in price levels between countries. PPPs are useful for comparing real economic quantities and broad price levels.
They are not the rate your bank will give you to transfer money, and they are not a replacement for city-specific rent or transport prices. They are a different analytical tool.
Why market FX can make a city look suddenly cheaper or more expensive
Imagine a local rent stays fixed at 2,000 units of currency. If your home currency strengthens by 10%, the converted rent appears cheaper to you even though the landlord has not reduced the rent. The opposite happens if your home currency weakens.
This matters most when you earn in one currency and spend in another, or when you still have debt, savings or family obligations back home.
Local salary decisions should start in local currency
If you will earn and spend in the destination currency, compare the salary with local rent, transport, groceries and taxes first. Then convert the result back to your home currency for context.
If you will be paid remotely in another currency, FX risk becomes part of the budget. A monthly income that comfortably covers local costs at today’s rate may be tighter after a currency swing.
Do not use PPP as a personal shopping basket
PPP baskets are broad statistical constructs covering many goods and services. Your personal basket can be very different. A renter with no car, a family buying childcare and a retiree paying healthcare costs do not experience the same spending mix.
Use PPP to understand broad international price-level differences, then use city and household-specific evidence for the actual move decision.
Inflation adds another layer
Inflation measures how prices change over time. A country can have lower inflation than another and still have a higher price level. The UK Office for National Statistics’ Household Costs Indices also show why different household groups can experience cost changes differently even within one country.
For a move planned months ahead, look at both the current price level and whether important categories—especially rent and energy—are changing quickly.
How Compare Living Cost handles FX
The site stores cost anchors in local currency, then converts display values using a dated FX snapshot. That means a source observation remains tied to its original currency and definition. The conversion can be refreshed without rewriting the evidence itself.
This is important for auditability. If a converted number changes, you can distinguish “the exchange rate changed” from “the underlying local price evidence changed.”
Three international-move scenarios
1. Local salary, local expenses
Focus first on local after-tax income versus local costs. FX is mainly useful for comparing the offer with your current finances and savings.
2. Foreign salary, local expenses
Model an FX buffer because your income and expenses are in different currencies.
3. Local salary, foreign obligations
If you will keep paying a mortgage, student loan or family support in another currency, that obligation can become more expensive even if your local budget is unchanged.
A better comparison workflow
- Compare each city in local currency.
- Identify the major cost categories and evidence dates.
- Convert the total with a current market FX rate.
- Use PPP/price-level data as broad context, not a personal bill.
- Stress-test the exchange rate if income and obligations span currencies.
For the full city-comparison workflow, see How to Compare Cost of Living Between Two Cities.
PPP is usually national; your move is usually city-specific
Purchasing power parity is excellent for comparing broad international price levels, but a national PPP does not tell you the rent premium in central London, the transit tariff in Tokyo or the neighbourhood spread in Vancouver. City-level housing can diverge sharply from national averages.
Use PPP as a macro check: does the country generally have a higher or lower price level? Then return to city-specific evidence for the categories that actually drive your budget.
FX snapshots need dates because currencies move faster than many prices
A transit fare may remain unchanged for a year while the exchange rate changes daily. Displaying a converted city total without an FX date can create false precision. A dated snapshot lets the reader distinguish a change in currency markets from a change in local prices.
For a move several months away, run at least one adverse FX scenario if you will transfer savings, service foreign debt or earn in another currency.
Cross-border savings and debt create asymmetric risk
If you earn locally but keep debt in your old currency, a weakening destination currency can make that debt more expensive relative to your pay. If you hold substantial savings in a stronger foreign currency, the same move can improve your local purchasing power. The city’s local cost of living has not changed in either case—the household’s currency exposure has.
Official data and methodology references
- ECB — Exchange rates methodology
- OECD — Purchasing Power Parities
- OECD — Price level indices
- ONS — Calculating the Household Costs Indices
These sources provide statistical or methodological context. They do not imply that every source directly supplies a Compare Living Cost city value; city-page evidence remains documented separately in the site’s public ledgers.