Downloadable UK admin packs · Paid once · 2026/27

UK business admin, paid once and yours to keep.

Subscriptions rent you software.

Packs hand you the document.

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Thirty day refund, no questions. Files yours to keep, VAT included.

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The catalogue

Five packs, paid once

Each written in accordance with current UK statute, with the case law named in the footnotes so you can check the working.

Pack 01 £19

Sole Trader Tax Workspace

A seven sheet workbook with the Companion Guide and Walkthrough, built on the 2026/27 bands and ready for Making Tax Digital.

For the freelancer filing their own Self Assessment. Open this pack Pack 02 £39

Creative Contracts Pack

Nine contracts and four supporting documents, aligned to the CDPA 1988, written to hold in plain English.

For the designer, photographer or studio who needs a contract that holds. Open this pack Pack 03 £49

UK Employment Law Kit

Eleven letters and a payroll cost calculator, current to the Acas Code, covering the hiring lifecycle.

For the small employer hiring a first person. Open this pack Pack 04 £39

UK Landlord Legal Pack

Twelve documents, eight guides and four tools, written for the RRA 2025 transition, the 31 May information sheet and the new grounds.

For the private landlord managing their own lets. Open this pack Pack 05 £59

AML and KYC Document Pack

The AML policy, risk assessment and procedures every supervised agent is legally required to hold. Fifteen templates across eight sectors, no free official equivalent, ready for an HMRC inspection.

For the estate or letting agent under HMRC supervision. Open this pack
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All prices VAT inclusive. Delivered as spreadsheet, document and PDF files, yours to download and keep, with updates when HMRC rates change.

What's actually inside

Four specimens from the catalogue

Real pages from the packs, not stock mockups. The income tax and National Insurance working from the sole trader workspace, a project fee calculator from the creative contracts pack, a flexible working decision tree from the employment law kit, and the statutory anchors index from the AML and KYC pack.

The Sole Trader Tax Workspace computing a full Self Assessment from one income figure
From Pack 01 Sole Trader Tax Workspace Put in one income figure and the sheet returns the whole Self Assessment: income tax, Class 4 National Insurance, the effective rate, and the monthly amount to set aside, each mapped to the box it belongs in on the return.
The project fee calculator from the Creative Contracts Pack working out a quote
From Pack 02 Creative Contracts Pack A project fee calculator. Set the scope, the day rate and the complexity, and it returns a base, a suggested, a floor and a ceiling fee, so a quote stops being a guess.
The flexible working decision tree from the UK Employment Law Kit, five steps with the statutory grounds for refusal
From Pack 03 UK Employment Law Kit A flexible working decision tree. Five steps from the request to the decision, with the eight statutory grounds for refusal, so a reply stays inside the Acas Code.
The statutory anchors index from the AML and KYC Document Pack mapping each template to its regulation
From Pack 05 AML and KYC Document Pack A statutory anchors index. Every template mapped to the regulation it answers to, the MLR 2017 regulation and the POCA section, so an inspector can see the control behind each document.

Click any specimen to enlarge it, click again to return. Specimens are extracts. The packs contain the full statute-current document set.

The maths, by pack

Pay once, not every year

Each pack stands against the credible product people pay for instead. Subscriptions are shown over a year, so you can see the accumulative cost compared to our products.

The pack The credible equivalent Their cost Ours, once
Sole Trader Tax Workspace FreeAgent sole trader planaccounting software, billed monthly £228a year £19Yours to keep
Creative Contracts Pack Rocket Lawyer UK membershiplegal document subscription £420a year £39Yours to keep
UK Employment Law Kit Keeping HR Simple template packclosest one for one bundle £399once £49Yours to keep
UK Landlord Legal Pack NRLA landlord membershipwhere most landlords get their tenancy documents £125a year £39Yours to keep

Comparable prices verified June 2026 from each supplier's own listing, shown inclusive of VAT. Our prices include VAT.

Free tools

Free tools, on us

Five quick checks that share the statute behind the packs. Try the free tool. If you need the document set, the paired pack is one click away.

01 Pairs with Sole Trader

IR35 Status Checker

Seven CEST-style questions, instant verdict. Atholl House, PGMOL and Kickabout citations baked in.

Open checker →
02 Pairs with Sole Trader

MTD Penalty Clock

Live countdown to MTD ITSA phase 1. Penalty bands, late-filing points, daily-rate triggers.

Start clock →
03 Pairs with Employment Law

Employer Costs Calculator

Salary in, true annual cost out. Class 1 NI, Employment Allowance, pension auto-enrol, holiday accrual.

Calculate →
04 Pairs with Landlord Legal

Landlord Compliance Check

Twelve yes or no questions covering RRA 2025, the 31 May information sheet, Section 13 rents, EPC, Right to Rent.

Start check →
05 Pairs with AML and KYC

Compliance Calendar

Every HMRC and Companies House deadline for the next twelve months. Exportable as .ics for your calendar app.

Build calendar →
Questions

Things people ask before they buy

Five answers, written by a UK sole trader, not a marketing team.

  1. Q1What happens when HMRC rates or statute changes?

    You get the updated file. Free, by email, in the same order line as the original purchase. April rate changes, mid-year case law, new Acas Code wording, all included. The packs are built so the figures live in named cells, not in body text, so an update is a re-export, not a rewrite.

  2. Q2How do I know the documents are actually right?

    Every pack cites the UK legislation and the named case law it rests on in the footnotes, dated to the tax year, so you don't have to take my word for it. Each figure traces back to the gov.uk or HMRC source it came from, and you can check the working yourself before you ever rely on it.

  3. Q3Will these hold up in an inspection or a dispute?

    Each pack is built to the rules it answers to, the MLR 2017 for AML, the Renters' Rights Act 2025 for landlords, the Acas Code for employment, and written to be inspection ready. They're thorough, structured templates, not legal advice, so if you're in a live dispute with real money on it, take the document to a solicitor. For the everyday compliance most independents actually face, it's the file you'd otherwise pay an advisor far more to produce.

  4. Q4What is the refund policy?

    Thirty days, no question. Reply to the receipt with the word "refund" and the original purchase is reversed inside the week. You keep the files; we are not in the business of policing whether you used them in the meantime.

  5. Q5Who are these built for?

    UK independents who handle their own admin. Sole traders, freelancers, micro-employers, private landlords, small letting and estate agents under HMRC AML supervision. If you're running a business on small margins and the SaaS bills are eating the margin, the packs are written for you. If you have a finance team and an accountant already, the packs probably duplicate their work.

Why this exists

Hi :) I'm James Thom, a sole trader, and I built ExternalOS because I kept hitting the same wall. Whenever a compliance question came up, the only answers online were a monthly subscription priced for a firm with ten staff, or an advisor charging two hundred pounds an hour for a conversation I didn't really need. Nobody sold the thing itself, the spreadsheet that does the maths, the template with the statute already in it.

So I wrote them. It took about six months to get the five packs to a standard I'm happy to put my name on, each one citing the UK legislation and the case law it rests on in the footnotes, so you can check the working yourself. You pay once and the file is yours. If you find a mistake, or a rate I haven't updated yet, email me and the correction, or a full refund, comes back in the same thread as your receipt. We offer free tools also, any feedback would be appreciated!

James Thom

Questions, corrections, a statute citation I missed: hello@externalos.com.

ExternalOS · 2026/27

The boring admin, done.

Browse all five → Find my pack