Fixed-Price vs Hourly Billing for Ecommerce Projects
Ecommerce builds need checkout optimisation and conversion work scoped in from day one. Fixed-price milestones cap your cost, include CRO, and let you stop after any working release.
Fixed-price or hourly for an ecommerce build?
Fixed-price is better when your ecommerce feature, migration or storefront rebuild has clear requirements — checkout flow, payment integrations, product data — that need to be scoped into the work before it starts. Hourly billing suits exploratory R&D where the scope is genuinely unknown. For most production ecommerce builds, fixed scope gives finance a number they can approve and gives you a cap on cost overruns.
Fixed-price vs hourly, side by side
| Dimension | Fixed-price (AnyPlace) | Hourly billing |
|---|---|---|
| Launch deadline | A date the store can be built to, agreed at discovery | A deadline that moves with the hourly bill |
| Checkout work | One priced milestone for the whole flow - cart, payment, shipping, confirmation | Split across separate tickets, each with its own debate |
| Conversion work | A testable hypothesis with a baseline measured before the change | Experiments run on whichever surface the week allows |
| Seasonal peaks | Capacity and load testing are part of the acceptance criteria | Discovered when the November traffic arrives |
| Inventory and ERP sync | Scoped as one integration with a defined source of truth | Three integrations, three spreadsheets, three sources of truth |
| What fits | A defined catalogue, checkout and launch date | A marketplace with undifferentiated supply, where the model is still being tested |
Budget and risk comparison
| Measure | Fixed-price | Hourly |
|---|---|---|
| Cost of the launch | Known before the first line of theme code | Discoverable only after the hours are spent |
| Performance work | Core Web Vitals budgets are written into the milestone | Handled as a separate engagement after launch |
| If the scope grows | The next milestone is priced before it starts | Added to the same open timesheet |
| Checkout conversion | Baseline measured, fix shipped, result measured | A list of ideas the team may or may not get to |
| Peak season readiness | Load-tested before the date that matters | Handled in the busiest week of the year |
Illustrative figures, not a quote. See pricing ranges.
When fixed-price works for ecommerce builds
Ecommerce scope is unusually concrete — catalog, checkout, promotions. That clarity is exactly what fixed-price milestones are built for.
Fit 01
Platform migration
Moving off Magento, WooCommerce or a legacy platform has a defined source and target: migrate products, customers, orders and URLs, then cut over. The destination is fixed, so the price can be.
Best for
Replatforms with an existing store and real order history.
Fit 02
Custom storefront
When the theme no longer fits the brand, a bespoke storefront is a bounded build — design system, templates, integrations and launch. Hourly billing just charges more for the same storefront.
Best for
Brands whose UX is part of the product.
Fit 03
Checkout optimisation
Cart, checkout and PDP improvements are measurable: define the funnel, implement the changes, measure conversion. Each experiment becomes a milestone with a known price.
Best for
Stores with traffic but soft conversion rates.
What drives ecommerce project scope
These five factors move an ecommerce estimate more than anything else. Scope each one honestly before comparing quotes — they explain most fixed-price differences and most hourly overruns.
| Scope driver | What it changes | Typical impact |
|---|---|---|
| Catalog size | Product count, variants, attributes, images and migration cleanup. | 10,000+ SKUs with messy data can double migration effort. |
| Integrations | ERP, CRM, 3PL, PIM and accounting syncs — each with its own API quirks. | Every deep integration adds weeks; middleware is where hours disappear. |
| Payment methods | Cards, wallets, BNPL, bank transfers and regional methods. | Each method brings its own compliance and checkout states. |
| Promotions engine | Discount rules, bundling, loyalty tiers and stacking logic. | Simple coupons are cheap; enterprise rule engines are a project alone. |
| Multi-store | Multiple regions, currencies, languages and storefronts on one backend. | Per-storefront theming and tax rules multiply front-end work. |
Common questions
Is fixed-price realistic for an ecommerce build?
For a defined catalogue, checkout and a launch date, yes - and in ecommerce the deadline is what makes it work. The scope is stable even when the design changes: catalogue, cart, payment, shipping, order confirmation. What is not fixed scope is a marketplace model that is still being tested against competitors.
How do you price conversion work?
Separately from the build, and against a measured baseline. The first engagement is a baseline and a ranked list of leaks; each subsequent fix is a small fixed-price milestone with a hypothesis stated in advance, so you can tell whether it worked rather than whether it felt better.
What about peak season - Black Friday and festive sales?
Load testing and a go-live readiness review are part of the acceptance criteria, not an extra. The conversation about what to do with a slow checkout starts before the traffic arrives, which is the only time it is a useful conversation.
Can you work with our existing Shopify or ERP setup?
Yes. Most of the work is integration - the catalogue, the inventory source of truth and the payment and shipping configuration. We scope the integration explicitly so that one clear system owns inventory and the others read from it, rather than three spreadsheets disagreeing at checkout.
Content last reviewed October 2026.
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