Consumer Spending
Consumer spending makes up roughly 60% of GDP in advanced economies and 35–55% in most emerging markets. The composition tells a sharp story: low-income households spend over 50% on food; high-income households spend under 15%. Housing absorbs 20–35% in most advanced economies. Healthcare and education have risen as shares everywhere over the past 50 years.
Key insights
Engel's Law holds robustly
Ernst Engel's 1857 finding — that food share of household budgets falls as income rises — is one of the most robustly verified regularities in economics. Bangladesh and Nigeria spend ~50% of household budget on food; the US ~13%; Singapore ~7%. Within-country, the same pattern holds across income deciles. The mechanism: food consumption is roughly capped by physiology while income can grow without limit.
Housing has risen as a share
In the 1960s US, housing was ~22% of consumer spending. Today it's 33%. Similar pattern across the OECD. Drivers: rising land prices in big cities; quality improvements (larger homes, better amenities); slow productivity growth in construction. Healthcare and education have risen in parallel for similar Baumol-cost-disease reasons. Manufactured goods and food have fallen as shares.
Composition convergence has limits
Chinese household consumption is shifting toward the OECD pattern as incomes rise — food share fell from 53% (1980) to 30% (2023). But composition won't fully converge: cultural preferences (dining out vs cooking), housing tenure differences (urban renting vs owning), healthcare-system design (single-payer vs out-of-pocket), and welfare-state coverage all leave durable cross-country differences in observed spending patterns.
US household budget composition (2023)
% of total household spending, BLS Consumer Expenditure Survey
Key Finding: Housing and transport together account for half of household spending. Food share remains under 15%.
Food share of household spending — selected countries
% of consumption spending devoted to food at home
Key Finding: Nigeria and Bangladesh spend nearly 50%; the US, UK and Singapore under 15%.
Methodology & caveats
Spending vs consumption
Household spending (cash outlays) differs from consumption (use of services). Imputed rent for homeowners is consumption but not spending. Employer-paid healthcare is consumption but not household spending. National accounts use 'household final consumption expenditure' which includes imputed rent. Cross-country comparisons should specify which concept is used.
Budget surveys vs national accounts
Two main sources: household budget surveys (BLS CEX in US, FES in UK, OFCS in EU) and national accounts derived from production statistics. The two often disagree — surveys typically capture 70–85% of national-accounts consumption. The gap reflects under-reporting (alcohol, tobacco), elite under-sampling, and methodology choices.
Quality adjustment over time
Comparing 'spending on food' in 1960 vs 2024 is harder than it looks. Food today includes more processing, more variety, restaurant meals. Housing includes air conditioning, internet, more square footage. Hedonic and chain-weighted indices try to adjust for this; long-run shares should be read as the broad pattern rather than precise point comparisons.