What is Open-Book Contracting?

Open-book contracting is the alternative to the traditional model in which the supplier names a fixed price and the buyer has no visibility into how it was built. With open book, the cards are on the table: the supplier discloses their input costs, labour costs, fixed overhead loading, and the agreed margin percentage.

This model works particularly well for services with variable cost components — cleaning, catering, facilities services, and technical maintenance. If cleaning material costs rise, you see it in the books and pay more. If they fall, you pay less. You share the fluctuations in both directions.

Open-book contracting requires trust and practical arrangements covering what information is disclosed, who may inspect the books, how frequently the cost build-up is reviewed, and what margin is agreed.

One important caveat: open book only works if you can interpret the information provided. Not every SMB owner has the knowledge to analyse a cost price calculation from a facilities company. An external adviser or procurement consultant can help evaluate the data.

Combining open-book contracting with a bonus-malus arrangement based on quality indicators is a powerful structure for long-term outsourcing contracts.

In outsourced services, you normally have no way of knowing whether you are paying a fair price. The supplier sets a monthly rate based on what the market will bear — not on their actual costs. Open-book contracting reverses that logic.

For SMBs outsourcing significant services such as cleaning, catering, or facilities management, open book links the price to commercial reality rather than to the supplier's negotiating position.