Which data can you trust when comparing Spain with other countries?

Key rules

• Wages: Compare wages in PPP, using medians where you can, not raw euro averages.
• Official first: Eurostat, OECD and INE data beat crowdsourced indices and asking-price portals for any serious comparison.
• Local figures: National averages hide city and regional gaps, so use your own city's figures for personal decisions.
• Dates: Check the reference year or edition of every dataset before you rely on it.

The short answer

Use official statistics from Eurostat, the OECD and Spain's INE as your base. Use crowdsourced sites and asking-price portals only for a rough feel. Every source has limits, and the limits are usually about definitions, coverage and how old the data is. The source list below the article shows where to find each one.

Check these traps first

Most bad comparisons come from comparing things that are not the same.

• Exchange rates or PPP. PPP (purchasing power parity) adjusts for local prices. Market exchange rates do not. Compare wages in PPP, not just in euros.
• Mean or median. High earners pull averages up. The median shows the typical person better.
• Gross or net. Check how taxes and social contributions are treated.
• Who is counted. Surveys differ on full-time versus all workers, on informal work and on what counts as a household.
• Unemployment. The international definition differs from registered unemployment.
• Reference year. Data is often published with a lag and later revised. Always check the year.

The notes that come with Eurostat and OECD datasets explain these choices.

Cost of living

• Best sources: Eurostat price level indices compare consumer prices across EU countries and some others. OECD PPP figures give price-adjusted comparisons. INE publishes inflation and household spending surveys.
• Weak points: National averages hide big differences between cities. The standard basket will not match your own spending. Rent is poorly captured.
• What to do: For a personal decision, build a budget for your own city and lifestyle.

Wages

• Best sources: Eurostat earnings statistics, including the Structure of Earnings Survey and minimum wage data. OECD average wage and employment data. INE's EPA (Encuesta de Población Activa, the labour force survey) and its wage structure survey.
• Weak points: Gross versus net, mean versus median, full-time equivalent adjustments and sector coverage all vary. The EPA is a quarterly sample and gets revised.
• What to do: Compare in PPP and check each dataset's reference year.

Housing

• Best sources: Eurostat's housing cost overburden rate, the share of people spending more than 40% of disposable income on housing. INE's housing price and rent indices. Banco de España reports on housing and affordability. The Ministry of Housing's price series based on actual transactions.
• Weak points: National averages hide large regional gaps. Survey data lags. Countries define housing costs differently.
• Property portals: They are good for current trends, but they show advertised prices, not signed ones, and lean toward cities. They are not official statistics.

Healthcare

• Best sources: OECD Health at a Glance covers spending, doctors and outcomes. Eurostat health statistics cover unmet needs and life expectancy. Spain's Ministerio de Sanidad publishes public-system waiting lists and the Barómetro Sanitario, a patient satisfaction survey.
• Weak points: Spain's health system is run by its regions, so a national average hides regional differences. Countries measure waiting times differently.
• Private rankings: The Euro Health Consumer Index is a private ranking, not an official source, and its last editions are some years old. Check the edition year of any report.

Safety

• Best sources: Eurostat crime statistics. The UNODC data portal. The Ministry of the Interior's quarterly Balance de Criminalidad for Spain.
• Weak points: Legal definitions and police recording differ, and underreporting varies. National rates hide local variation.
• What to do: Homicide is the most comparable indicator. Compare like-for-like offence categories. The Global Peace Index is a composite with subjective elements, so treat it as a rough guide.

Crowdsourced indices

Numbeo is built from voluntary user submissions. There is no controlled sample and no representative weighting. Contributor numbers vary by city, and outliers and stale entries can distort results. Its indices are relative to New York City and use a basket that may not match your spending. It is fine for a rough city comparison. Do not use it for a serious country comparison when Eurostat or OECD data exists.

A simple routine

1. Pick the factor that matters most to you.
2. Take the official figure from the source above.
3. Check the definition, the year and whether it is an average or a median.
4. Then look for your own city's figures, not the national ones.

The questions below cover common doubts.

Where to find reliable figures for comparing Spain

Where to find reliable figures, by factor

• Eurostat (European Union statistics office): Cost of living: use the price level indices to compare consumer prices across EU and some other countries. They give one aggregate figure per country, hide city differences and capture rent poorly.

• OECD: Cost of living and pay: use purchasing power parities (PPP) to compare prices, and compare wages in PPP terms. Average wage and employment data cover many countries, but definitions differ between them.

• INE (Instituto Nacional de Estadística, Spain's statistics institute): Cost of living and pay: find Spanish consumer prices and household spending, plus the labour force survey (EPA) and the wage structure survey.

• Eurostat earnings and housing statistics: Pay and housing: use earnings statistics and the minimum wage data. For housing, use the housing cost overburden rate, the share of people spending more than 40% of disposable income on housing. Check gross versus net and mean versus median.

• INE housing price and rent indices: Housing pressure: read official price and rent trends for Spain.

• Banco de España (Spain's central bank): Housing pressure: read its reports on housing and affordability.

• OECD Health at a Glance and Eurostat health statistics: Healthcare: compare spending, doctors, outcomes, unmet medical needs and life expectancy. Waiting times are measured differently between countries.

• Ministerio de Sanidad (Spain's health ministry): Healthcare: find waiting lists in the public system and the Barómetro Sanitario, a patient satisfaction survey. Regions run healthcare, so national averages hide gaps.

• Eurostat crime statistics and the UNODC data portal: Safety: compare crime across countries. Homicide is the most comparable figure, because legal definitions, police recording and underreporting differ for other offences.

• Ministerio del Interior (Spain's interior ministry): Safety: read the quarterly Balance de Criminalidad for Spanish figures, and compare like-for-like offence categories.

Frequently asked questions

Should I compare wages in euros or in PPP?

Compare wages in PPP, because PPP adjusts for local price levels and market exchange rates do not. A salary that looks higher in euros can buy less where prices are higher. Also check whether a figure is gross or net, and mean or median.

Is Numbeo reliable for comparing countries?

No, Numbeo is not reliable for comparing countries, because it is built from voluntary user submissions with no controlled sample. It works for rough city comparisons, but use Eurostat or OECD data for country comparisons. Small cities and tourist or expat bias can distort its results.

Is the Global Peace Index a good way to compare safety?

No, the Global Peace Index is not the best safety measure, because it is a composite score with subjective elements. Homicide is the most comparable indicator across countries. Compare like-for-like offence categories, since police recording and legal definitions differ.

Can I trust asking prices on property portals to judge housing costs?

Only for current trends, because asking prices are advertised prices rather than signed ones and lean toward cities. For a fuller picture, use official price and rent indices and the share of people who spend more than 40% of their income on housing.

Do national averages tell me what living in my city will cost?

No, national averages hide big city and regional differences, so they are a starting point only. Rent is also poorly captured in price level comparisons. For your own decision, build a budget from the city you would live in.