Fixed price vs retainer is the second-most-important agency decision after picking the agency itself. Honest comparison from a London team that uses both models. When fixed price wins (clearly defined scope, hard deadline, finite project). When retainer wins (ongoing strategy, evolving scope, compounding outcomes). Studio in Shoreditch (EC2A) covering W1, EC1, EC2A, NW1, E14.
Fixed price wins for: clearly scoped projects (logo, landing page, single Webflow build, business plan, pitch deck), hard deadlines (visa application, fund-raise close), finite work with deliverable milestones, and clients who want certainty over flexibility. Risk: scope creep mid-project — we manage this with strict change-orders. All our productised pricing (£199 logo through £14,999 MVP) is fixed-price.
Retainer wins for: ongoing strategy work (SEO, PPC, content, fractional CMO), evolving scope (we don't know what next month's priority is until this month's data lands), compounding outcomes (retention, brand, organic traffic), and clients who need capacity-on-tap. Retainers run £199/mo (Local SEO Starter) up to £6,999/mo (Premium Fractional CMO).
Common mistake: signing fixed price for ongoing work (every change becomes a billable change-order, relationship sours fast). Or signing retainer for a single discrete project (paying ongoing fee when you wanted a one-off). Match the engagement model to the work shape, not to which sounds cheaper.
A typical engagement breaks down like this. Every line is in your fixed-price proposal — no day-rate ambiguity.
| Phase | Cost (typical) |
|---|---|
| Fixed-price (small) Logo, landing page, business plan, pitch deck | £199–£1,499 |
| Fixed-price (mid) Brand site, Webflow build, app MVP starter | £1,499–£14,999 |
| Fixed-price (large) Mobile app, Shopify Plus migration, full identity programme | £14,999–£75,000 |
| Retainer (small) Local SEO, basic PPC, single-channel content | £199–£999/mo |
| Retainer (mid) Multi-channel SEO + PPC, content, retention | £999–£3,999/mo |
| Retainer (premium) Fractional CMO, dedicated team, full-stack growth | £3,999–£9,999/mo |
| Total engagement | £199–£9,999 |
All tiers include free strategy call, fixed scope, and 30-day post-launch support. Buy direct via Stripe or book a call first — the price is the same either way.
Free strategy call within 24 hours. A senior strategist (not a sales rep) reviews your brief and follows up with a fixed-price proposal in 5 working days.