Insinööritoimisto Kolmostie Oy is a limited company based in Helsinki, registered in 2006. Its taxable income in 2024 was 142 t€ and its income taxes 29 t€. Public buyers bought 2,0 M€ from it in 2022–2026; the largest buyer is Työllisyys, kehittämis- ja hallintokeskus (Työ- ja elinkeinoministeriön hallinnonala).
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Taxes
Measured by taxable income, Insinööritoimisto Kolmostie Oy is in the top quarter of the industry class engineering design and technical consultancy incidental to urban planning (178 companies with taxable income; median 25 t€, 5,6 times the median).
Taxable income is the profit as calculated for taxation, not revenue. Public data from the Finnish Tax Administration; figures for 2025 are published in November 2026. Revenue, financial ratios and employee numbers are shown once the company has filed its financial statements digitally.