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Your catalogue holds everything you sell — goods and services alike. Building it turns invoicing from typing descriptions into selecting items, and it makes your revenue reports meaningful.

Why bother

Adding a product or service

1

Open Products and choose New product

From the Invoicing sidebar.
2

Enter the basics

3

Set the price

Your standard selling price. It can be overridden on any individual invoice line.
4

Set the tax rate

Which of your configured rates applies. Get this right at the product level and every future invoice is correct without thought.
5

Set the unit

Each, hour, kilogram, box, day. Appears on the invoice line.
6

Link to inventory if it is a stocked item

Match the SKU to the inventory item so selling it moves stock. See Inventory overview.
7

Save

It is now selectable on invoices, quotes and purchase documents.

Pricing

Be consistent about tax-inclusive versus tax-exclusive pricing across your whole catalogue. Mixing the two produces invoices where some lines behave differently from others, and totals that customers query.

Changing prices

Editing a product’s price changes it for future invoices only. Invoices already issued keep the price they were issued at — as they must, since the customer has a copy. If you are increasing prices:
1

Tell customers first

Particularly those on recurring invoices.
2

Update the catalogue

Change the price on the product.
3

Check your recurring invoices

They pick up the new price at their next run. See Recurring invoices.
4

Check open quotes

A quote already sent at the old price should be honoured. Do not silently reprice it.

Organising the catalogue

As it grows, structure helps:
  • Categories — group by type of work or product family
  • SKU conventions — a consistent code structure makes searching fast
  • Archive rather than delete — archiving keeps historical invoices intact; deleting breaks them
Never delete a product that appears on issued invoices. Archive it. Deleting removes the link and leaves historical documents referencing something that no longer exists.

Services versus products

Consultancy, delivery charges, installation, monthly retainers — all services. Set them up properly rather than typing them freehand each time.

One-off lines

You do not have to catalogue everything. On any invoice you can type a description, quantity, price and tax rate directly without creating a product. Use this for genuinely one-off items. If you find yourself typing the same description for the third time, put it in the catalogue.

Tax rates on lines

The product’s rate is applied by default and can be changed per line. Change it when:
  • You are exporting, and the supply is zero-rated
  • The specific supply is exempt
  • The customer’s circumstances change the treatment
If you are changing the rate on most lines, the product’s default rate is wrong. Fix it at source.
Related: Setting up invoicing for configuring the tax rates themselves, and Create and send an invoice for using the catalogue.
Last modified on August 4, 2026