HOAI fee calculator

Get a fee estimate based on the HOAI 2021 fee tables in one minute — for buildings and interiors, structural design or technical equipment.

Non-binding estimate: since the ECJ ruling C-377/17 (2019) the minimum and maximum rates of the HOAI are no longer binding — fees are agreed freely. This calculation is neither an offer nor legal advice.

Service profile

Eligible costs (net, in euros)

Table range: €25,000 to €25,000,000. Outside this range the HOAI makes no stipulation.

Fee zone

The fee zone reflects the planning requirements (zone I = very low … highest zone = very high). Your planning office will help you classify your project.

Commissioned service phases

Phase 1 — Basic evaluation (2 %)
Phase 2 — Preliminary design (7 %)
Phase 3 — Design development (15 %)
Phase 4 — Approval planning (3 %)
Phase 5 — Execution planning (25 %)
Phase 6 — Preparation of contract award (10 %)
Phase 7 — Assistance with contract award (4 %)
Phase 8 — Site supervision (32 %)
Phase 9 — Post-completion support (2 %)

Fee estimate

Enter the eligible costs — the result appears instantly.

Table values and percentages: HOAI 2021 (secs. 34/35, 51/52, 55/56), intermediate values interpolated linearly.