# Prices, units and tax defaults

> How an item's sale price, cost price, unit, tax rate and posting accounts flow onto invoice and purchase lines.

Canonical: https://docs.getonebooks.com/items/pricing-tax/
Language: en
Documentation index: https://docs.getonebooks.com/llms.txt

An item stores defaults. When you pick it on a document, the defaults are copied onto the line, and you can still change the line — the item itself is not affected.

![The Add Item form showing sale price, cost price, tax rate and accounts](https://docs.getonebooks.com/screenshots/en/items-new.webp)

## What flows where

| Item field | Invoice or quote line | Purchase line |
|---|---|---|
| Description | Prefilled | Prefilled |
| Unit | Shown next to quantity | Shown next to quantity |
| Sale price | Unit price | — |
| Cost price | — | Unit price |
| Default tax rate | Tax % | Tax % |
| Sales account | Revenue account the line posts to (default **4000 Sales Revenue**) | — |
| Purchase account | — | Account the line posts to (default **5000 Cost of Goods Sold**) |
| Preferred supplier | — | Suggested supplier |

## Tax-inclusive or exclusive prices

Prices follow your business's **Tax Inclusive Pricing** setting: with it on, the sale price you type includes tax; with it off, tax is added on the document. Changing the setting does not rewrite stored prices — review them if you switch. See [Tax settings](https://docs.getonebooks.com/tax/settings/).

## Services and goods

Untick **Can be purchased** for a service you only sell, or **Can be sold** for something you only buy. Each picker shows only the relevant items.

## Related

  - [Tax settings](https://docs.getonebooks.com/tax/settings/)
  - [Chart of accounts](https://docs.getonebooks.com/accounting/chart-of-accounts/)