Why CIS workers need software built for the scheme
Every CIS contractor and subcontractor faces a set of compliance requirements that standard small-business software does not always handle well. Contractors must file a CIS300 return by the 19th of every tax month, verify each subcontractor with HMRC before the first payment, issue deduction statements within 14 days of each payment, and (from April 2026) file a nil return in any month they make no subcontractor payments. Subcontractors must report their gross income correctly on their Self Assessment returns, handle the domestic reverse charge if they are VAT-registered, and, from April 2026, submit quarterly MTD ITSA updates if their gross income tops £50,000.
That last point catches many subcontractors out: the MTD threshold is tested on gross income before CIS deductions, not the net amount that lands in the bank. A subcontractor who receives £48,000 after 20% CIS deductions on £60,000 gross (on the labour element of invoices) is over the £50,000 threshold and in scope from April 2026 based on the £60,000 figure. Software that does not handle MTD ITSA is not a minor inconvenience for those workers, it is a compliance gap.
The domestic reverse charge (DRC) adds another layer. In force since 1 March 2021 and unchanged by Finance Act 2026, the DRC requires the VAT-registered customer to account for VAT to HMRC rather than the supplier charging it. Any software used by a VAT-registered CIS business must apply the correct DRC VAT treatment on applicable invoices, or the business risks errors on its VAT return.
This guide compares the five most widely used packages across the features that matter for CIS work. Pricing was verified against vendor sources and independent review sites in June 2026 and is shown excluding VAT unless noted.
The full comparison: five products across seven CIS criteria
The table below scores each product against the seven criteria most relevant to CIS businesses. The notes below the table explain the important distinctions.
| Feature | QuickBooks | Xero | Sage | FreeAgent | Clear Books |
|---|---|---|---|---|---|
| Entry plan price (per month, excl. VAT, checked June 2026) | £16 (Simple Start) | £16 (Ignite) | £15 (Start) | Free (NatWest/RBS) or £14.50 | £17 (Micro) |
| CIS included free on entry plan | Yes | Calculations only | No (Standard required) | Yes (subcontractor side) | Yes |
| CIS300 direct HMRC filing | Yes (all CIS plans) | Add-on: £5/mo extra | Yes (Standard and Plus) | No | Yes |
| Subcontractor verification | Yes (within app) | Yes (with add-on) | Via HMRC portal redirect | No | Yes |
| DRC VAT support | Yes | Yes | Yes | Yes | Yes |
| MTD ITSA compatible | Yes | Grow plan and above | Yes (Standard and above) | Yes | Yes |
| Payroll included | Paid add-on | Paid add-on | Yes (1 employee on Standard) | Paid add-on | Paid add-on |
| Phone support | No (chat/email) | No (chat/email) | Yes | No (chat/email) | No (chat/email) |
Key notes on the table. Xero's CIS calculations (auto-deductions on invoices, reports) are included on all plans, but HMRC submission of the CIS300 requires the £5/month add-on. FreeAgent handles the subcontractor side well but does not file the CIS300, so it is suited to subcontractors rather than contractors paying multiple subbies. Sage's verification process redirects users to the HMRC portal rather than completing the check within the application. Clear Books is a UK-built cloud package that is less well known than the three main competitors but offers direct CIS300 filing at a competitive price.
QuickBooks for CIS: the value leader
QuickBooks is the only product in this comparison that includes CIS functionality at no additional cost across its main plans. Simple Start at £16 a month (checked June 2026), Essentials at £33, Plus at £47 and Advanced at £115 all include CIS deduction management, CIS300 direct filing, subcontractor deduction statements and DRC VAT coding. The Self-Employed plan at £10 a month does not include CIS.
For a sole-trader subcontractor who wants to record deductions, track expenses and file MTD ITSA quarterly updates, Simple Start at £16 a month covers everything without any add-on cost. For a main contractor paying multiple subcontractors, the same plan handles verification, deduction statements and CIS300 filing to HMRC. The practical difference from Xero is that you are not paying an additional £5 every month simply to file the monthly return.
QuickBooks also offers Bureau Payroll mode for accountants managing CIS returns across multiple clients, which is useful if you handle CIS compliance for a portfolio of construction businesses. From April 2026, contractors must also file nil returns in months with no subcontractor payments: QuickBooks handles nil CIS300 submissions within the same workflow as substantive returns.
Limitations worth noting: payroll is a paid add-on to QuickBooks rather than bundled in, and customer support is via chat and online rather than telephone, which some contractors find limiting when they have a time-sensitive filing question near the 19th-of-the-month deadline.
Xero for CIS: stronger interface, watch the add-on cost
Xero's plan structure changed in 2024. The old Starter, Standard and Premium tiers were replaced by Ignite (£16/month, checked June 2026), Grow (£33/month), Comprehensive (£47/month) and Ultimate (£59/month). All four plans include CIS calculations: auto-deductions on subcontractor invoices, CIS reports and the ability to export return data. What they do not include is direct filing of the CIS300 to HMRC.
To file the CIS300 directly, bulk-email deduction statements and run subcontractor verification within Xero, you need the CIS add-on at £5 a month. Over a year that is £60 on top of the plan price, or nearly four months of an Ignite subscription. For an annual filing obligation that is not a large sum, but it is worth factoring in when QuickBooks includes the same filing capability in its base plan price.
Xero's interface is widely regarded as cleaner and more intuitive than Sage's, particularly for users who spend most of their time on invoicing and bank reconciliation rather than payroll. Xero supports MTD ITSA on the Grow plan and above, so sole traders with gross income over £50,000 who choose Xero need at least Grow (£33/month) plus the £5 CIS add-on. The Ignite plan is not sufficient for MTD ITSA sole traders.
For a VAT-registered electrician or plumber who works for VAT-registered contractors, Xero handles DRC VAT correctly when configured, and the interface makes it relatively straightforward to apply the reverse charge to applicable invoices. The guide to how the domestic reverse charge works in construction explains which supplies the DRC applies to.
Sage for CIS: bundled payroll and phone support
Sage's three plans are Start (£15/month, checked June 2026), Standard (£30/month) and Plus (£59/month). CIS is not available on the Start plan. Standard is the entry point for CIS, and at £30 a month it includes CIS300 direct HMRC filing, automatic deduction calculations on invoices, payroll for up to one employee and phone support.
The phone support differentiator is meaningful for contractors who use the software around filing deadlines and want a human answer rather than a chat queue. QuickBooks and Xero are chat and email only, which works well for most tasks but can be frustrating when you need a specific answer about how a transaction should be coded on the day a CIS300 is due.
Sage's subcontractor verification process redirects the user to the HMRC portal rather than completing the check within the application, which adds a step compared to QuickBooks or Xero with the add-on. This is an inconvenience rather than a blocker, but it matters for contractors who verify a high volume of subcontractors each month.
Sage 50cloud is a more powerful desktop-plus-cloud product aimed at larger contractors managing 20 or more subcontractors, with more granular job-costing and project-tracking features. It carries a significantly higher price and is most relevant for main contractors with turnover above £500,000 and a need for detailed project-level reporting.
FreeAgent for CIS subcontractors
FreeAgent is the outlier in this comparison because of one fact that most guides do not surface prominently: it is free for personal account holders with NatWest or RBS business banking. For a sole-trader subcontractor who already banks with either of those institutions, FreeAgent costs nothing and handles CIS income recording, expense tracking, MTD ITSA quarterly updates and Self Assessment filing.
The limitation is on the contractor side: FreeAgent does not file CIS300 returns directly to HMRC. It is well suited to subcontractors who receive CIS deductions and need to reconcile their position for Self Assessment, but it is not the right primary software for a main contractor paying multiple subcontractors and filing monthly CIS300 returns. For that use case, QuickBooks or Sage are more appropriate.
Choosing by business type
The right software depends on which side of CIS you are primarily on, and how your business is structured.
| Business type | Recommended product | Why |
|---|---|---|
| Sole-trader subcontractor, no employees | QuickBooks Simple Start or FreeAgent (if NatWest/RBS) | CIS included free, MTD ITSA covered, lowest cost |
| Limited company subcontractor | QuickBooks Simple Start or Xero Grow | CIS and EPS payroll handling; MTD ITSA on Xero Grow |
| Contractor paying 1-10 subcontractors | QuickBooks Simple Start | CIS300 filing and verification included; lower monthly cost than Sage |
| Contractor paying 10-plus subcontractors, with employees | Sage Standard | Bundled payroll, phone support, all-in-one CIS and accounting |
| Electrician or plumber, VAT-registered | Xero Grow plus CIS add-on | Interface suited to frequent invoicing; strong DRC VAT handling |
| Large contractor or groundworker business | Sage 50cloud or QuickBooks Advanced | Job costing, advanced reporting, multi-user access |
Trade-specific callouts
Electricians and plumbers often work as subcontractors for larger building firms and then bring in their own labour as they grow. Xero's invoicing interface is particularly well regarded for this pattern of work, and its DRC VAT handling is clean once configured. The £5 CIS add-on becomes relevant as soon as you start paying your own subcontractors.
Groundworkers and civil contractors tend to operate with higher invoice volumes and larger supply chains. QuickBooks Advanced at £115 a month or Sage 50cloud handles the volume more comfortably, with better job-level reporting and multi-user access for office-based bookkeeping staff.
Builders and general contractors at the smaller end are well served by QuickBooks Simple Start. The CIS300 filing, deduction statements and subcontractor management are all included at £16 a month, and the interface is accessible for owner-operators without a bookkeeping background.
CIS300 filing: the contractor's monthly obligation
Every contractor must file a CIS300 return by the 19th of the following tax month. Tax months run to the 5th, so the return for the month to 5 May is due by 19 May. Payment of deducted CIS to HMRC is due by the 22nd electronically or the 19th by cheque.
From 6 April 2026, contractors must also file a nil return in any month they make no subcontractor payments, or pre-notify HMRC of inactivity. That obligation was removed in 2015 and reinstated under Finance Act 2026. Missing a nil return carries the same penalty ladder as missing a substantive return: £100 for one day late, £200 at two months, £300 or 5% of the CIS liability at six months, and £300 or 5% at twelve months, with a further penalty of up to £3,000 or 100% where information is withheld deliberately.
All five software packages in this guide can generate CIS300 return data. Whether they can file it directly to HMRC is where they differ: QuickBooks, Sage Standard/Plus and Clear Books file directly; Xero requires the £5 add-on; FreeAgent does not file the CIS300 at all. Our guide to the CIS monthly return covers what goes on the CIS300 and how to handle edge cases including retentions and corrections.
MTD ITSA: the April 2026 urgency for subcontractors
Making Tax Digital for Income Tax applies from April 2026 to sole traders and partnerships with gross income over £50,000, dropping to £30,000 from April 2027. "Gross income" means turnover before any CIS deductions. A subcontractor on £60,000 gross who receives £48,000 after 20% CIS deductions on the labour element is tested on the £60,000 figure and is in scope from April 2026.
If you are in scope and your current software does not support MTD ITSA quarterly updates, you need to switch or add a bridging solution before the next quarterly deadline (7 August, 7 November, 7 February and 7 May). All five products in this guide are MTD ITSA compatible, with the exception that Xero restricts sole-trader MTD ITSA to the Grow plan and above. The full MTD guide for CIS subcontractors is at Making Tax Digital and CIS.
Honest limitations by product
| Product | Main limitation for CIS users |
|---|---|
| QuickBooks | Payroll is a paid add-on; support is chat-only; Self-Employed plan excludes CIS |
| Xero | £5/month extra for CIS300 filing; MTD ITSA only on Grow plan and above (£33/month) |
| Sage | Older, denser interface; Start plan has no CIS; verification redirects to HMRC portal |
| FreeAgent | No CIS300 filing to HMRC; not suited to contractors paying multiple subcontractors |
| Clear Books | Smaller user base; fewer integrations; less widely supported by accountants |
Getting the comparison right for your situation
The right software choice comes down to three questions: are you primarily a subcontractor receiving deductions, or a contractor paying and filing for others? Do you have employees who need payroll alongside your CIS work? And is phone support important when things go wrong near a deadline?
For most sole-trader and small-contractor CIS businesses, QuickBooks at £16 a month delivers the best combination of CIS completeness and cost. Sage Standard at £30 is worth the premium if you have employees and value telephone support. Xero is a strong choice if you prefer its interface and you account for the £5 CIS filing add-on. FreeAgent is genuinely the best option if you bank with NatWest or RBS and your CIS role is purely as a subcontractor.
If you would like to see your own numbers first, the CIS refund estimator and CIS take-home calculator give you a quick picture before discussing your software and accounting setup. Our guides to Xero for CIS, QuickBooks for CIS and Sage for CIS go deeper on setup and step-by-step configuration for each product. The limited company guide at CIS for limited companies covers the EPS reclaim route that is unique to company subcontractors.