Most accounting software treats CIS as a percentage knocked off an invoice. Stoneledger was built around it. Every invoice separates labour from materials, so the deduction is worked out on the right figure at the right rate. Your turnover stays gross, because a CIS deduction is not a cost: it is your own tax, paid early. And Stoneledger tells you, in plain English and with the real dates, how and when you get it back.
Labour and materials, split on every invoice. Deductions at gross, 20% or 30%, taken on labour only.
What you’re owed, and when. A running total of what has been taken off you, the refund it adds up to, and the route back - your Self Assessment as a sole trader or partner, or your monthly payroll return as a limited company.
Every statement checked. Payment and deduction statements are matched to your invoices; missing statements, wrong rates and materials that don’t add up are flagged.
Retention tracked from the invoice until the money is released.
Quarterly figures on gross turnover, with CIS shown separately - the mistake that understates your income by a fifth is designed out.
Contractor and subcontractor in one book, if you are both. For contractors
Tax → CIS - Subcontractor · Sole trader sample book
Accounts filing & CT600 filing
File your company accounts and CT600 for £8.
Preparing and checking - Accounts & CT600
Free
Bring in your trial balances or type your figures in, and see your company's accounts and its Corporation Tax on screen, with every check - before you pay anything.
Making Tax Digital (MTD) for Income Tax reaches sole traders and landlords with qualifying income over £50,000 from April 2026, over £30,000 from April 2027 and over £20,000 from April 2028. Once you are in, you send four quarterly updates a year and then your tax return by 31 January. Stoneledger already prepares the figures HMRC asks for - here they are, straight from the product - and it has completed its testing in HMRC’s sandbox. We are on track to send them for you from the 2027 to 2028 tax year.
Income Tax
Quarterly updates · Sole trader sample book
VAT
VAT return, box by box · Sole trader sample book
CIS
CIS300 monthly returns · Sole trader sample book
What Stoneledger will do
Connect to HMRC securely. You sign in on HMRC’s own site; Stoneledger never sees your Government Gateway password.
Send your quarterly updates straight from your books, with your obligations and deadlines as HMRC holds them.
Show HMRC’s tax calculation after each update, next to Stoneledger’s own.
Real-time insights. Your profit, your tax bill, VAT, CIS and the money in the bank move the moment you record something, not at the year end. Every figure opens into the entries behind it, so you know where you stand before a deadline rather than after it.
Submit your tax return at the end of the tax year, through MTD.
File VAT returns under MTD for VAT, and show your VAT obligations, liabilities and payments.
File CIS300 monthly returns and verify subcontractors with HMRC.
Send the fraud-prevention data HMRC requires with every submission. This part is built, and is being tested against HMRC’s test service now.
Keep your spreadsheet or your software. Submit through Stoneledger Bridge.
MTD does not make you move your books. Bridging software - HMRC’s own name for it - is the digital link between the records you already keep and HMRC: a spreadsheet, or a report exported from Xero, QuickBooks, Sage, FreeAgent or whichever package you use. The figures you send are the figures in your records, and nothing is retyped along the way.
Import a CSV or Excel file, just as it comes out of your spreadsheet or your software.
Match your columns and categories to HMRC’s boxes once. Stoneledger remembers them, so next quarter’s file matches itself.
Check every figure back to the rows it came from, with a warning before anything goes: a total counted twice, a VAT box in pence, a CIS rate that does not fit.
Submit your MTD for Income Tax quarterly update, your VAT return or your CIS300 monthly return, and keep HMRC’s receipt with the file it came from.
Unlimited submissions · pay for the time, not the filing
£10 a yearUnlimited submissions for twelve monthsevery quarterly update, every VAT return, every CIS300
£4 a quarterUnlimited submissions for three monthsenough for a quarter’s update and a VAT return
£3 a monthUnlimited submissions for one monthfor one deadline, or a month of catching up
One business, as many submissions as it needs. No subscription you have to remember to stop. The full product - the books, the tax and every submission - is £8 a month or £50 a year.
Stoneledger Bridge runs on the same connection to HMRC, and the same checks, as the full product. It is being built alongside it, and goes live with it once HMRC grants Stoneledger live access.
A spreadsheet, as an MTD quarterly update · Imported spreadsheet
Free checker
Am I in Making Tax Digital?
Over a million sole traders and landlords come into Making Tax Digital (MTD) for Income Tax in April 2027, and most do not know it yet. Two questions, and you will know your date. No email, no sign-up - the answer is free either way.
Every Making Tax Digital for Income Tax start date
From
Income over
You
HMRC tests the tax year two years before your start date, because it reads the figure off a return you have already filed. So this is a guide from where you are now. Partnerships have no announced date, and a limited company is not in MTD for Income Tax at all.
The year still ends with a tax return. Under MTD it is due by 31 January as now, sent through your software. It is not an extra filing, and nothing replaces it.
The next step
Want the full picture?
For just £5, check your MTD readiness and the health of your bookkeeping records - with a clear report showing what looks right, what needs attention and what to do next. From your answers and, if you like, your own records, read on your own device.Your MTD readiness and the health of your books, in one clear report for £5.
Sign up with your name, your email and a password, then add your card: nothing is taken until your 30 days end, and you can cancel before then. Already using Stoneledger? Log in.
Only need your company's accounts and CT600 filed? Accounts filing & CT600 makes them from your trial balance, or figures you type in, and files them at Companies House and HMRC.
Journal entry
Journals, with the guidance built in.
Most books need a few journals a year: income received before it is earned, a bill that arrives after the year end, a cost paid from your own pocket. Stoneledger has a template for each. The accounts a journal always uses are filled in and locked, the guidance beside it says what to choose, and you type the amount once.
Nine templates down the side, from income received in advance to a depreciation adjustment, with a blank journal for anything else. Each one says when to use it, what it posts, what you choose and gives an example, in a few lines rather than a manual.
A customer pays for a year up front. Deferred income is fixed. Choose the income account, or link the sales invoice and it is filled in for you, then type the amount once. Say when it is fully earned, and whether monthly, quarterly or all on that date. Stoneledger posts the deferral now and every release with it, and shows you each one before you post. A part month takes its share by days.
March's electricity, billed in April. Accruals is fixed and the journal reverses itself on 1 April, so when the real bill arrives it is not counted twice.
A year's van insurance paid in June. Prepayments is fixed. Link the purchase invoice and its account, amount and date are filled in. Give the first and last day the bill covers, and the cost goes back into the profit at each month end, so each month carries its own share.
A business cost paid on your own card. The other side is filled in for you: money introduced by the owner for a sole trader, the director's loan account for a company, which the company now owes you.
Every journal in the year, with its reference and lines. Releases carry their place in the schedule, and a journal and its reversal point at each other. Each one flows into the trial balance, the balance sheet and your tax figures straight away.
The fixed account locked for you
Type an account by code or name
Releases and reversals posted for you
Balanced before it can be posted
For landlords
Letting is its own business. Stoneledger treats it as one.
If your rents, together with any self-employed income, come to more than £30,000 before costs, Making Tax Digital (MTD) catches you from April 2027: four updates a year, and your tax return sent through the software. Stoneledger keeps the properties, the tenancies, the certificates and the figures in one place - and works your mortgage interest the way the law actually does, which is the thing cheap software most often gets wrong.
Every property on one screen: what it earns, what it costs, the profit, what you paid for it and the yield that follows. Jointly owned? Your share of the income and your share of the capital, so the yield is yours and not the whole property's. Click any figure to open the entries behind it.
What the agreement says is due, against what has actually arrived, tenancy by tenancy. Deposits are shown with the one thing that matters about them: whether they are protected. They must be in an approved scheme within 30 days, and the penalty for missing it is up to three times the deposit.
Since 2020 mortgage interest on a residential letting is not a cost of the business. It buys a 20% reduction off your tax instead - capped, with whatever the caps hold back carried forward to later years. Stoneledger shows the whole working, says where every figure came from, and carries the balance into next year for you.
Gas safety every year, an electrical report every five, the EPC, the deposit, the licence, the Right to Rent check and the paperwork the Renters' Rights Act now requires. Each one dated, each one with what it costs to get wrong - an unlimited fine and six months for the gas certificate, up to three times the deposit for the protection.
Gas, electrics, EPC, deposits and licences, each with what it costs to get wrong · Sole trader sample book
Four quarterly updates and your tax return, in HMRC's own boxes. Plus the ones that are not annual and do not go through software at all - above all the 60-day capital gains report on selling a let home, which is late long before your tax return is due. Stoneledger works the gain out and counts the days; it tells you plainly that the report itself goes through your own HMRC account.
If you pay subcontractors for construction work, you are a CIS contractor: a return to file every tax month, a statement for every subcontractor you paid, and deductions to pass on to HMRC. Stoneledger keeps all of it together, worked out from the same invoices, so the return, the statements and your books always agree.
What you have taken off your subcontractors is HMRC's money from the moment you deduct it, not yours. Stoneledger shows what has been deducted, what has actually been paid over, and what is still sitting in the business - worked from the invoices and the bank, not from a figure anybody typed. Beside it: this year against last, and a month-by-month view of exactly what each return will say.
Every subcontractor on file with their UTR, verification number and deduction rate - gross, 20% or 30% - so each payment is deducted correctly. Anyone missing something a return needs is flagged before the month closes, not after. Verify before you pay, not after: an unverified subcontractor is deducted at 30% instead of 20%, and you cannot put that right retrospectively once the month's return has gone.
Money held back against defects is theirs, not yours - it is owed, but not payable until the defects period ends. Stoneledger keeps it on its own account instead of burying it in what you owe your suppliers, tracks it invoice by invoice, and works the CIS on it at the rate in force on the day you release it, because HMRC treats a release as a payment in its own right.
A CIS300 for every tax month, nil returns included, with the due date, the penalty building up if one is late, and a record of when each was prepared and when it was submitted. Stoneledger keeps those two apart, because only a submitted return stops a penalty.
A payment and deduction statement for every subcontractor you paid, every month, from the same figures as the return - issued, referenced and kept on file in the Statement Outbox. They are due within 14 days of the tax month end, and they are the only proof your subcontractor has that the tax was ever taken.
CIS records have to be kept for three years after the end of the tax year they relate to, and Stoneledger says the date rather than the rule: how many subcontractors, how many invoices, how many returns prepared, and the day you can stop keeping them. When the accountant asks, the whole contractor side comes out as one file.
About £4.17 a month. £46 less than paying monthly.
30 days free - cancel before it ends and pay nothing.
Comparison vs what the big names charge you
Stoneledger's price against Xero, QuickBooks and Sage
Software
The plan you would need
A month
A year
Stoneledger
Everything, one plan
£8
£50 on the yearly plan
QuickBooks
Simple Start - its first plan with VAT
£16
£192
Xero
Ignite - VAT and CIS, and £5 a month more to file contractor CIS returns
£18
£216
Sage
Accounting Standard - its first plan with CIS
£43
£516
On the yearly plan that is £142 to £466 a year less, for one plan that already includes what theirs charge extra for.
List prices before VAT as each company publishes them, checked on 5 October 2026, ignoring introductory discounts. Their introductory offers - up to 90% off - last six months, and then the full price applies: from £16 a month at QuickBooks, £18 to £70 at Xero and £20 to £59 at Sage for the plans that handle VAT. CIS and payroll can cost extra on top: Xero charges £5 a month more to file contractor CIS returns, Sage moves you up a plan for CIS, QuickBooks sells payroll as a separate subscription, and Xero and Sage charge for each person on payroll beyond those included. With Stoneledger, VAT, CIS and payroll are all in the one price.
Keep your spreadsheet or the software you already use, and send the figures to HMRC through Stoneledger Bridge: your Making Tax Digital (MTD) for Income Tax quarterly updates, VAT returns and CIS300 monthly returns. Unlimited submissions for the time you pay for, once HMRC has recognised it. How bridging works
£10 a yearUnlimited submissions for twelve months
£4 a quarterUnlimited submissions for three months
£3 a monthUnlimited submissions for one month
How it can cost this little
Stoneledger is built and run by a small, dedicated team. We don’t have a sales floor, a big head office or a national advertising budget to pay for, and we build one product for the businesses we know rather than a range of them. So there are no large running costs to price into your subscription - and the saving is passed straight to you.