For UK construction contractors & bookkeepers

The whole month of CIS statements, calculated and ready for review.

Paste a month of subcontractor payments. The tool applies the HMRC rate/status you select, flags common review items, and prepares payment & deduction statements with HMRC-listed fields plus a CIS300 review summary.

Guidance & templates — not tax, accountancy or legal advice. It applies the published CIS arithmetic to the figures and statuses you enter; you remain responsible for verification, scope, figures and filings. Verify with a qualified accountant or HMRC if unsure.

Get instant access → Try the free checker first →

Free, no sign-up: check one subcontractor's deduction in our CIS Deduction Checker and see if your current process is right — before you buy. Or see how the full tool works.

✓ Runs in your browser ✓ No data uploaded ✓ No subscription ✓ 30-day money-back
The monthly grind

HMRC gives you the deadlines and fields. You still need a clean monthly workflow.

HMRC publishes the rules and an example payment & deduction statement, but many contractors still rebuild the monthly paperwork by hand for every subcontractor. The arithmetic is easy to mistype, and the 19th comes around fast.

🧮

The maths trips people up

20% or 30%? On the labour only, after excluding VAT and allowed materials/items. One wrong split can affect the statement and the monthly return figures.

📄

One statement per sub, by hand

Every subcontractor you deduct from needs a written statement within 14 days of the tax-month end. Ten subs is ten documents to prepare, check and keep.

⚠️

The errors are silent

A missing UTR, a 30% row with no verification number, or materials greater than the payment can be easy to miss in a spreadsheet.

This product is for the focused monthly job: review the figures, prepare the statements, export a summary, and keep the data on your own device.

How it works

Paste the month. Get statements, summary and review flags at once.

A single, deterministic tool built for the one CIS job you repeat every month. No login, no upload, no spreadsheet wrangling.

Enter your details once

Contractor name and PAYE reference flow onto every statement. Pick the tax month — the picker shows the 6th-to-5th range.

Paste the payments

Straight from your spreadsheet — comma or tab separated. One row per subcontractor: name, UTR, status, gross, materials.

Reconcile & review

It excludes VAT/materials from the amount liable to deduction, applies 20% / 30% / 0% to the labour based on the status you selected, totals the month, and flags rows to review.

Generate everything

A statement for each sub using HMRC-listed fields (print or save to PDF), a CIS300 review CSV summary, and a dated sign-off checklist.

The detail that earns trust: the deduction is applied after excluding VAT and allowed material/items from the gross payment, following HMRC's published CIS method. The VAT domestic reverse charge is deliberately kept off the statement because it is a VAT matter. Always check current rates, dates and scope on GOV.UK and verify figures before you file.
What you get

A complete monthly CIS toolkit — not just a calculator.

the core tool
⚡

The Bulk Reconciler

Reconcile a whole month at once — 1 subcontractor or 30.

  • Applies 20% / 30% / gross status to the status you enter
  • Carves out materials before the deduction
  • Per-sub and monthly totals in seconds
  • Runs offline — your data never leaves the device
included
🛡️

The 8-point Error Catcher

Common review items, flagged before you send anything.

  • Missing or non-10-digit UTRs
  • 30% rows with no verification number
  • Materials greater than the payment
  • Duplicates and unusual material splits
included
📄

The Statement Generator

One statement per subcontractor, batch-built.

  • Formatted with HMRC-listed fields
  • Your branding: name, ref, address
  • All of them built in a single click, one per page
  • Save the set as PDF with your browser's Print → Save as PDF

A note on honesty: a browser tool can't write a file straight to your disk, so the last step is your browser's one-tap Print → Save as PDF (we open the print sheet for you). No upload, no print driver, no surprise.

included
📊

The CIS300 Review Summary + Sign-off

The figures to file, and a paper trail to keep.

  • CSV summary with monthly figures for review before filing
  • Per-sub breakdown with flags noted
  • Dated audit sign-off checklist (file & pay dates)
  • Plain-English operator's guide to the CIS rules
One-time price

Own it once. Use it every month.

No subscription. No per-statement fee. No account to cancel.

Launch price
One-time purchase
£49one-time
Launch price until the checkout offer is changed.
  • The Bulk Reconciler toolThe core month-at-once engineincluded
  • 8-point Review CheckerFlags common data mistakes for reviewincluded
  • Statement GeneratorEvery statement batch-built with HMRC-listed fieldsincluded
  • CIS300 review summary + sign-offMonthly figures + your paper trailincluded
  • Operator's guide to the CIS rulesPlain-English, with source linksincluded
Launch price£49
Get instant access — £49 →
Launch price until the checkout offer is changed.

Secure checkout. Instant download. 30-day money-back guarantee.

30-DAY
MONEY
BACK

Run a full month through it, risk-free.

Use the reconciler on a real month of payments. If it does not make the review and statement-preparation workflow clearer, email us within 30 days for a full refund.

You keep the operator's guide either way.

Honest answers

Questions, answered straight.

Is this tax or accountancy advice? +
No — and we're clear about that. It's a guided self-assessment tool. It performs CIS deduction arithmetic and formats statements using HMRC-listed fields, based on the figures and statuses you enter. It does not verify subcontractors with HMRC, file your return, or decide whether a payment is within CIS or what counts as materials. Those judgements stay with you and your accountant. Always check the current rules on GOV.UK.
Does it file my CIS300 with HMRC? +
No. It produces per-subcontractor and monthly totals for review, plus a CSV you can keep, but you file the CIS300 and pay HMRC through HMRC's own service. We deliberately don't connect to HMRC, so none of your data ever leaves your device.
Where does my subcontractor data go? +
Nowhere. The whole tool runs inside your browser tab — there's no server, no account and no upload. You can even disconnect from the internet and it still works. For a firm handling other people's payment details, that's the point.
I'm a bookkeeper with several construction clients — does it work for that? +
Yes. Run each client's month through it, generate that client's statements and review summary, save the CSV and sign-off checklist to their file, then move to the next. Confirm your professional obligations before using it for client work.
Mac or Windows? Do I need to install anything? +
Neither matters and no. It's a web page — open it in Chrome, Safari, Edge or Firefox on any Mac, PC or tablet. Nothing to install, no macros, no “enable content” warnings.
What about the VAT reverse charge? +
The domestic reverse charge is a VAT matter. This CIS tool keeps VAT/reverse-charge treatment outside the statement workflow. Enter CIS figures excluding VAT and handle reverse-charge VAT separately, with your accountant if unsure.
What if it doesn't work for me? +
Email us within 30 days for a full refund, no questions. Keep the operator's guide. There's no subscription to cancel — it's a one-time purchase.

Make the monthly CIS review easier to evidence.

Review the month, flag common data issues, prepare statements, and get organised before filing.

Get instant access — £49 →

One-time price · instant download · 30-day money-back guarantee