Extra Work and Price Changes in Czech Work Contracts (Smlouva o dílo) 2026
“Extra work” (vícepráce) is the most common source of disputes in Czech work contracts — construction, IT, design. The Civil Code distinguishes fixed price, budget-based price, budget with reservation of completeness, and non-binding budget. Wording matters.
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Budget wording is decisive
If price is based on a budget, state explicitly whether it is binding, non-binding, or with a reservation that quantities are not guaranteed.
Without clear wording, you cannot assume the contractor may unilaterally increase the price — the legal category controls when increases are allowed.
Change orders in practice
Use written change orders before extra work starts: scope, price impact, time impact, signatures.
If the contractor must warn you before exceeding a budget, put that duty and a price cap in the contract.
Typical freelance or trade projects with a defined deliverable and price model.
High-value construction, public procurement, major defect claims.
Create a Czech work contract (smlouva o dílo)
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