Welcome — you’re a few minutes away from a working Simple-C account and a free trial. Here’s exactly what to expect.

Open the sign-up page

Head to app.simple-c.net/register.

If someone shared a referral link with you (something like app.simple-c.net/register?ref=ABC123), use that link — the referral code is picked up automatically.

Fill out the form

The registration form is a single page split into two sections.

General Information

  • Company Name — your firm or DBA (at least 3 characters)
  • First Name and Last Name
  • Phone Number — US format (XXX) XXX-XXXX
  • Email — this becomes your login. It has to be unique across Simple-C, so if you’ve signed up before, use that account instead.
  • Password — between 6 and 50 characters

Contact Details

  • Address, and Address 2 if you need a second line
  • State (pick from the list) and City
  • Zip code — 5 digits

These are also the address details that go on your invoices, so make sure they’re right.

Confirm you’re human

Below the form you’ll see a Cloudflare Turnstile checkbox — give it a moment to verify you’re a real person. The Register button stays disabled until it’s complete.

Agree and register

By clicking Register you accept Simple-C’s Terms and Conditions and Privacy Policy. When the form submits successfully:

  • Your company, your user, and your office are all created in one go
  • Your free trial starts automatically — no credit card needed up front
  • A welcome email lands in your inbox a few seconds later
  • You’re signed in immediately and dropped onto your dashboard at /home

That’s it — there’s no separate email-confirmation step. The welcome email is just a friendly hello.

What to do first

Now that you’re in:

  1. Add your first client — every expense in Simple-C belongs to a client (see Managing clients)
  2. Connect a bank account or upload a statement — see Adding your first expense for both paths
  3. Invite your team — if you’ll be working with others, add them on the Users page

Trouble registering?

A few common things to check:

  • “This email is already registered” — try signing in instead, or use the Forgot password link
  • Phone number error — Simple-C expects a US number in the (XXX) XXX-XXXX format
  • Zip code error — exactly 5 digits, no extension

If something else is going wrong, our support team is happy to help.