---
title: "0s and 1s CIS API"
account: 0sand1s
slug: 0s-and-1s-cis-api
---

# 0s and 1s CIS API

Construction Industry Scheme: calculate deductions, gross-up, tax months, penalties and nil returns

- Operations: 14
- Versions: 1 (latest `caf4279c7477`)
- Source: https://0sand1s.co.uk/api/v1/openapi.json
- OpenAPI document: https://skmtc.dev/0sand1s/apis/0s-and-1s-cis-api/revisions/caf4279c7477?raw

## Operations

14 in total, by tag:

- CIS (14)

Every operation, with a link to its markdown: https://skmtc.dev/0sand1s/apis/0s-and-1s-cis-api/llms.txt