Public rate card · fixed price and revenue share

Know the deal before the work starts.

Commission a complete, defined job for a fixed price. For qualifying product partnerships, explore revenue share instead of a build invoice. Named senior leadership can also be retained by days or month. We write down the scope and terms before starting.

01 · Fixed price

A known outcome for a known price.

We compile the scope, quote the complete job and absorb execution risk inside that agreed boundary. New or changed requirements are made visible and separately approved; we do not hide them by delivering less.

Ask for a fixed-price quote →
02 · Revenue share

We earn when the product earns.

For qualifying products, there is no build invoice. Zero Drift designs, builds and operates the product for an agreed share of revenue received, with an annual cap and lower tail written into the contract. You keep the business and product IP.

See the full partnership model →
03 · Retainer or day rate

Named senior attention for ongoing decisions.

Fractional leadership and genuinely open-ended recovery work use published day rates or monthly retainers. The agreed days, decision authority and delivery capacity are written down before work starts.

See the leadership service →
S1Architecture ReviewTime2 weeksTermsfixed£12,000S2Agentic-Ready Codebase AnalysisTime1–2 weeksTermsfixed£8,000S3Depth Audit (is it actually done?)Time1 weekTermsfixed£6,000S4Technical Due DiligenceTime2–3 weeksTermsfixed; expedited +50%£15,000S5Spec Compile & Build PlanTime2 weeksTermsfixed; credited against S6 if Zero Drift builds it£10,000S6Feature-Complete Product BuildTimeDelivery window quoted from the agreed build planTermsfixed from the agreed plan or revenue sharefrom £60,000S7Technical Recovery / RefactorTimeScoped after an architecture or codebase reviewTermsscoped fixed price or day ratefrom £25,000 or £1,400/dayS8Verification Harness BuildTime2–4 weeksTermsfixed£18,000S9Fractional CTO / Architecture LeadTimeRetainer, 4–16 days/monthTermsday rate or monthly retainer£1,500/day; retainers £6,000 / £11,000 / £20,000 per month for 4 / 8 / 16 daysS10AI-Native Delivery EnablementTime2–3 weeksTermsfixed£14,000

Payment

Fixed work: 50% on start, 50% on delivery. Retainers: monthly in advance.

Prices exclude VAT.