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Paul Walsh

API integration · Sage Accounting

Sage Accounting integration

Your OpenCart, WooCommerce or Shopify store connected to Sage Accounting, so orders go in as sales invoices, customers as contacts and VAT on the right tax rate, with payments recorded against invoices so the books reconcile. Quoted up front, and you own the code.

  • Order sync from £850, agreed before any work
  • VAT mapping agreed with your accountant
  • You approve access in Sage and never share your password

Get a quote

I'll reply within 24 hours with a price.

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Or WhatsApp / text 07398 946 380

Prices

Every project is different, so these are starting prices. You get a written quote before any work starts, then 50% to begin and 50% when you're happy with it.

Order sync

Orders, customers and VAT into Sage, one way

From

£850

  • Sage sign-in approved by you, tokens stored securely
  • Orders created as sales invoices
  • Customers created as contacts without duplicates
  • VAT mapped to your Sage tax rates
  • Tested on a Sage trial account first
  • Error handling and sync alerts
Choose Order sync
Most popular

Full sync

Adds products, stock and payment reconciliation

From

£1,495

  • Everything in Order sync
  • Products matched to Sage products
  • Stock levels kept in step
  • Payments recorded against invoices
  • Requests queued and retried within Sage's limits
  • Log of every sync
Choose Full sync

Multi-store and custom

Bigger builds, quoted from your spec

Quoted

  • Everything in Full sync
  • Several stores into one Sage business
  • Two-way sync where it's needed
  • Custom rules for your products and VAT
  • Quoted from your spec
Choose Multi-store and custom

What the integration does

  • Orders become sales invoices Each order is created in Sage as a sales invoice, with the right customer, products, delivery charge and VAT, once it reaches the status you choose, such as paid or despatched.
  • Customers become contacts Customers are created as Sage contacts, or matched to the existing contact, so you don't end up with the same customer three times.
  • Products and stock Your shop's products are matched to products in Sage, and stock levels can be kept in step, so what you can sell online matches what Sage says you have.
  • VAT on the right rate Standard, reduced and zero-rated items, and exempt sales where you have them, are each mapped to the correct Sage tax rate, so your VAT return adds up.
  • Payments recorded against invoices When an order is paid, the payment is recorded in Sage against its invoice, so invoices show as paid and the bank reconciliation lines up.

One-way or two-way?

Most shops need a one-way sync: orders, customers and VAT flow from the shop into Sage, and Sage stays the place your accounts are kept. It's simpler, cheaper and easier to trust.

A two-way sync also sends information back from Sage to the shop, such as stock levels or prices you manage in Sage. It's worth it when Sage is where those numbers really live. The rule that keeps it reliable is that each piece of information has one home, so the shop and Sage never overwrite each other.

A connector app or a custom sync?

  • A connector app is the right answer when your setup is standard: one shop, simple VAT, orders into Sage as invoices. They're quick to set up and cheap to run. If one fits, I'll tell you, even though it means no work for me.
  • A custom sync is worth it when your rules are specific to you: several shops into one Sage business, mixed VAT, products that don't match one-to-one, stock managed in Sage, or payments that need reconciling properly. It costs more up front, but it does exactly what you need and you own the code.

How it's built

  • Connected the way Sage requires The Sage Accounting API (version 3.1, for the UK and Ireland) uses OAuth 2.0. You approve the connection once from your own Sage login, and you're alerted if it ever needs approving again, rather than invoices quietly stopping.
  • Tested on a trial account Sage has no sandbox, so everything is built and tested on a 30-day Sage trial account before your real books are connected.
  • Mapped with your accountant Ledger accounts, tax rates and how each kind of sale, delivery charge and refund should be recorded are agreed before anything is built.
  • Within Sage's limits Sage limits how many requests an integration can make. Requests are queued and retried, so a busy day doesn't lose records.
  • Never a duplicate Each order, customer and payment in your shop is linked to its record in Sage, so a retry updates the existing record instead of creating another one.

What's included

  • Every sync can safely run twice without creating duplicates
  • Error logging, alerts for failed syncs and automatic retries
  • Tested on a Sage trial account before touching your live books
  • A handover document, and the code is yours

Not included: your Sage subscription, tax advice (your accountant agrees the mapping and I build it), Sage Payroll, and changes to your shop outside the integration.

Payment is 50% to start and the balance on completion. For what drives the price, read what a Sage integration costs. On WooCommerce, see WooCommerce and Sage integration, and on Shopify, Shopify and Sage integration. On OpenCart and something's broken first? See OpenCart fixes. Using Xero instead? See Xero API integration.

How to get a price

Send a short written spec by WhatsApp, text, email or the form: your shop platform, which Sage product you use, how you take payment, and what you copy into Sage by hand now. I'll reply within 24 hours with a quote.

Guides

Questions

Which Sage product does this work with?

Sage Accounting, Sage's cloud accounting software, for businesses in the UK and Ireland. Sage 50, the desktop software, connects differently. Tell me which one you use and I'll advise.

Do I need to give you my Sage password?

No. Sage uses OAuth 2.0, so you approve the connection from your own Sage login and your password is never shared with me or stored in the integration.

How do you test it without touching my books?

Sage doesn't provide a sandbox, so the integration is built and tested on a separate 30-day Sage trial account, set up with your tax rates and ledger accounts. Your live books are only connected once it's proven.

Will my VAT be right?

The mapping from your shop's tax classes to your Sage tax rates is agreed with you, ideally with your accountant, before anything is built, and tested on the trial account before going live.

Is an off-the-shelf connector good enough?

Often, yes. If you run one shop with straightforward VAT and just want orders in Sage, a well-reviewed connector app is cheaper and I'll say so. Custom work makes sense when your rules don't fit what the connector does.

What happens on a busy sale day?

Sage limits how many requests an integration can make, so a well-built sync queues its requests and retries any that are turned away. Orders may be delayed briefly, but none are lost.

Need this built into your system?

Quicker to message? WhatsApp or text 07398 946 380, or email paul@paul-walsh.co.uk.

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