Checkout & Discount Logic
Checkout rules a discount code can’t express.
Tiered and B2B pricing, bundles, free gifts, delivery and payment rules — built with Shopify Functions and checkout extensions, at a fixed price per rule.
From $600Fixed price per function or package. Custom Functions need Shopify Plus.
When checkout can’t follow your pricing, you lose orders.
Most checkout problems come down to one rule Shopify can’t express out of the box.
Rules lost in the Scripts migration
Shopify Scripts stopped running on June 30, 2026. Some rules didn’t make it across.
Prices your discounts can’t express
Tiered, bundle or customer-specific prices end up as codes nobody remembers.
Delivery or payment options that don’t fit
Express shipping offered for bulky goods, net terms offered to first-time buyers.
Orders you can’t fulfil
Addresses you don’t ship to, caught only after the customer has paid.
What you get
Discount and pricing rules
Tiered and B2B pricing, bundles, buy-X-get-Y and free gifts.
Delivery and payment rules
Hide, rename or reorder options by cart, address or customer — including net terms for B2B.
Cart and checkout checks
Stop orders you can’t fulfil before the customer pays.
Checkout fields and notices
Extra fields, messages and offers inside checkout, built as checkout extensions.
How it works
From $600
Fixed price per function or package. Custom Functions need Shopify Plus.
Prices in US dollars, before any tax.
A 30-minute call
You describe the rule in your own words. We tell you if Shopify allows it.
A fixed quote
One price per rule or package, in writing, before we start.
Built, tested, handed over
We test on a development store first, then go live and hand over the code.
Questions before you book
Short answers. Anything else, ask us — the reply comes from one of the two people who would do the work.
Why do I need Shopify Plus?
Shopify only runs Functions built for a single store on Plus. Not on Plus? Start with an audit — we find App Store apps that do the job and set them up.
Start with an auditCan you rebuild the rules from our old Scripts?
Yes. Send us the Scripts or describe what they did, and we rebuild them as Functions.
Will it slow down my checkout?
No. Functions run inside Shopify itself, not on a server of ours, and Shopify holds them to strict time limits.
Tell us the rule. We’ll tell you if Shopify allows it.
A 30-minute call is usually enough to know what it takes and what it costs.
You talk to the engineers
No account managers. The two people on the call write the code.
A fixed price, in writing
Agreed before work starts. It only moves if the scope does.
The code is yours
Handed over with the repository and a short guide to how it works.