Subcontractor verification, monthly CIS300 returns, nil submissions, and deduction statements — filed direct to HMRC. Nothing goes without human sign-off.
What we handle
CIS compliance has six moving parts. We own all of them — so you're never chasing a deadline or second-guessing a deduction rate.
Every new subcontractor verified with HMRC before first payment. Gross, standard, or higher rate confirmed and logged. No guesswork on deduction rates.
Your monthly return filed by the 19th, every month. Active returns and nil submissions both handled. A missed nil return is still a £100 penalty.
Subcontractor deduction statements produced and distributed each month. Compliant format, accurate figures — what your subbies need for their own tax returns.
Schemes with no payments still need a return. Our engine flags every nil return automatically — filed before you'd think to check.
Monthly CIS deductions tracked against your P32 liability. Know exactly what you owe HMRC and when, without opening a spreadsheet.
When a payment or deduction changes after submission, we handle the amended return. Documented, traceable, and filed correctly.
How it works
bookd.OS processes your CIS data through a validated, deterministic engine. Every deduction is calculated rule-by-rule. Every return is reviewed before it files.
Payment schedules, new subcontractors, any changes. Email, spreadsheet, or via your portal.
bookd.OS verifies status with HMRC, applies the correct deduction rate, and prepares your CIS300. Same input, same output, every time.
Nothing goes to HMRC without sign-off. You see the return before it files.
Submitted direct to HMRC. Confirmation ID logged. Deduction statements issued to subcontractors.
Our system prepares every CIS return — verifies, calculates, validates. But nothing files until it's approved. That's not a feature. That's the architecture.
Who it's for
Running a scheme and paying subbies directly. You need compliant monthly returns and accurate deduction statements without the overhead.
Supplying workers to construction sites under CIS and PAYE. We handle both schemes in the same payroll run — RTI and CIS300 filed separately under the same bureau.
Your construction clients need CIS compliance. We run the bureau work under your brand — you keep the relationship, we keep the engine running.
Getting started
Share your scheme details, existing returns, and subcontractor list. We review everything and map the migration.
bookd. re-processes your CIS records from the ground up — correct deduction rates, correct verification status, correct treatment.
Your next CIS300 goes out under bookd. Full compliance from the 19th. No gaps, no legacy errors.
We handle every return, verification, and statement from here. You review and approve. We file and confirm.
Common questions
Book a free 20-minute call. We'll review your current setup and tell you exactly what we'd charge — no obligation.