Invisible consumers: how data deficiencies in energy efficiency of micro- enterprises influence policy design

Micro-enterprises represent major share of EU firms and account for almost 19.8% of EU value added, yet they remain invisible in energy statistics and energy efficiency policy evaluation. This invisibility is not only a matter of missing data but also a classification problem, since energy use is commonly allocated to household, commercial, or industrial sectors based on metering and contract arrangements rather than enterprise characteristics. As a result, micro-enterprise energy consumption is embedded in sectoral aggregates and cannot be consistently observed as a distinct analytical category. This paper examines how this statistical invisibility might affect the observability of micro-enterprises in energy efficiency policy design and evaluation. It combines a cross-country assessment of data availability across ten EU Member States with a Croatian case study based on a structured survey of 470 micro-enterprises. The survey investigates household-business overlap in workspace use, energy bills, and vehicle ownership. The cross-country review shows that core indicators needed for policy evaluation, including energy consumption, workspace or building use, transport activity, and size specific sectoral classification, are largely unavailable or only observable at aggregated levels. Financial information is available in some countries but remains weakly harmonised. Complementary sources can improve firm level coverage for economic variables but do not resolve the absence of micro-enterprise specific energy consumption data. The Croatian case study provides empirical evidence of extensive household and business overlap. 43% percent of respondents reported on shared household and business energy bills, and 64% report on shared vehicle use. These overlaps indicate that household energy statistics may overstate residential demand while business statistics may underestimate enterprises’ energy needs, with the strongest overlap among the smallest firms. The findings highlight the need to improve the statistical visibility of micro-enterprises and to explicitly account for mixed household and business energy use in both policy design and evaluation. This is particularly relevant for instruments targeting distributional impacts and vulnerability, including measures linked to the Social Climate Fund.