About 0s and 1s
CIS filing for contractors with a few subbies, and nothing else.
Who built it
Steffen Hoyemsvoll built 0s and 1s. He studied physics at Oxford and is a Chartered Wealth Manager. He co-founded a fintech that sold in 2018, and an accountancy that sold in 2023.
Why it exists
A contractor with a few subbies has two choices. Pay for an accounting suite with CIS as an extra, or use HMRC's free service and make the statements and payment records yourself.
0s and 1s does the CIS jobs: verify subbies, record payments, file the CIS300 and send statements. It costs £9 a month for 1 firm or £19 a month for up to 3 firms, excluding VAT, after a 30-day free trial. See how other CIS software compares.
Your Government Gateway login
You file with your own login. It goes to HMRC for the one verification or filing you're doing, then it's dropped. It isn't saved in our database, logs, error reports or analytics. More on how we keep your records safe.
HMRC recognition
0s and 1s has applied for HMRC CIS recognition; the decision is pending.
Getting help
Email support@0sand1s.co.uk with your question about 0s and 1s, your account or your records. We reply on weekdays, 9am to 5pm UK time, usually the same day.