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ContractBill

Sign up and sign in

Your ContractBill account is your mobile number. You type it, we send a 6 digit OTP by SMS, and the same steps either make a new account or open the one you have. Every new account comes with its own firm, where your tenders are kept.

Checked against ContractBill on 12 October 2026

Make an account

  1. On the sign in page, press Create an account.
  2. Type Your name, your Firm name and your Mobile number. You can leave the firm name blank and we will use your name.
  3. Press Send OTP. An SMS comes with a 6 digit OTP.
  4. Type the OTP and press Create account.

Sign in again

  1. Type your Mobile number and press Send OTP.
  2. Type the OTP from the SMS.
  3. If that number has no account yet, the page asks for your name and makes the account with the same OTP, so you do not wait for a second SMS.
The sign in page after Send OTP, with the OTP box and the line OTP sent on SMS
After you press Send OTP, the OTP comes by SMS. Change number, or send again takes you back a step.

Things to know

  • A mobile number is 10 digits and starts with 6, 7, 8 or 9. You can type +91 or a 0 in front, it is read the same way.
  • An OTP works for 10 minutes and only once. The SMS says so too.
  • If the OTP does not come, wait a moment before you ask again, and check the number you typed. Change number, or send again takes you back.
  • A sign in lasts 30 days on that phone or computer, then you sign in again with a new OTP.
  • To sign out on a shared computer, press the round letter at the foot of the side menu and press Sign out.
  • One person is one account. Your tenders belong to your firm, and only people in your firm can open them.

If you see this message

That OTP is not right.

Check the 6 digits in the SMS and type them again.

That OTP has expired. Please ask for a new one.

An OTP works for 10 minutes. Press Change number, or send again and a new one comes by SMS.

Too many wrong tries. Please ask for a new OTP.

The OTP stops working after too many wrong tries. Ask for a new one and type it carefully.

An OTP was just sent. Please wait a moment before asking for another.

The last SMS may still be on its way. Wait a little, then ask again.

Too many OTPs were sent to this number. Please try again in an hour.

Wait an hour and try again. If you need to get in sooner, write to us.

The service is not available right now. Please try again in a minute.

Wait a minute and try again. If it keeps happening, write to us.

You are signed out.

Your sign in ended, or you pressed Sign out. Sign in again with your mobile number.

Still stuck? Write to admin@revenin.com.