KashFlow Review UK 2026: In-Depth Analysis

KashFlow is one of the longer-running UK cloud bookkeeping platforms, originally built in 2005 and now owned by IRIS Software Group. It targets sole traders, contractors and small limited companies that want a straightforward, UK-focused tool for invoicing, bank reconciliation, VAT and light payroll, without the breadth (or price) of Xero or QuickBooks Online. This review covers the 2025/26 plans, MTD position, integrations, the realities of the user experience, and where KashFlow fits against the competition.

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Quick verdict

• Best for: UK sole traders, contractors and micro-limited companies who want simple invoicing, bank reconciliation, MTD VAT and the option of basic payroll in one cloud tool.
• Not for: Growing SMEs needing deep multi-entity reporting, large app marketplaces or modern UI design.
• Headline price: Starter from £13.50 per month plus VAT (RRP); Business from £27.50 per month plus VAT (RRP). 14-day free trial. Promotional discounts of up to 90% for the first six months are typically available to new customers.
• MTD status: HMRC-recognised for MTD for VAT. Works with the construction sector via CIS domestic reverse charge VAT support.
• Ownership: IRIS Software Group, a major UK accountancy software vendor.

What is KashFlow?

KashFlow is a cloud-based accounting and bookkeeping product built specifically for the UK market. Launched in 2005, it was one of the earliest UK SaaS bookkeeping tools and has always positioned itself against Xero, QuickBooks and Sage as the simpler, lower-cost UK alternative. The software is now branded IRIS KashFlow following its acquisition by IRIS Software Group, the company behind IRIS Accounts Production, IRIS Personal Tax, IRIS Elements and Senta practice management.

The IRIS connection matters because it shapes who KashFlow is really for. The headline target is the small business owner doing their own books, but KashFlow also functions as the client-facing bookkeeping layer for IRIS practices. Through IRIS KashFlow Connect, accountants can manage client books, push trial balances into IRIS Accounts Production, and centralise client work alongside other IRIS tools. That dual identity, part DIY tool, part feeder system for IRIS firms, explains a lot about the product’s design choices.

In practice, KashFlow is a no-frills, UK-only cloud ledger. Everything is built around UK VAT, UK PAYE, UK CIS and HMRC submission. There is no ambition to be a global platform like Xero or QuickBooks Online, and that focus is both its strength and its limitation.

Pricing breakdown

KashFlow runs on two main monthly plans, with payroll bundled into both rather than sold as a separate add-on. Pricing below is the published RRP for 2025/26. New customers commonly see introductory discounts of up to 90% for the first six months.

Plan	Monthly RRP (ex VAT)	Annual RRP (ex VAT)	Best for
Starter	£13.50	£162	Sole traders, contractors, very small businesses
Business	£27.50	£291.50	Growing small businesses and limited companies
Business + Payroll	£27.50 (payroll bundled, up to 5 employees)	£291.50	Limited companies running a small payroll

What you get on each plan

Starter

• Up to 10 invoices per month
• Up to 25 reconciled bank transactions per month
• Single user
• VAT management and MTD submission
• Mobile app
• 50+ standard reports
• Payroll for up to 5 employees

Business (recommended)

• Unlimited quotes and invoices
• Unlimited bank reconciliation
• Multi-user access
• Everything in Starter
• Payroll for up to 5 employees included

A 14-day free trial is offered on both plans. KashFlow also sells a managed payroll service (a bureau-style add-on) priced separately for businesses that want IRIS to run payroll for them rather than self-serving inside KashFlow.

Worked example

A limited company director with one employee, around 30 sales invoices a month and a busy current account would outgrow Starter quickly because of the 10-invoice and 25-transaction caps. The realistic plan is Business at £27.50 per month plus VAT, which works out to £330 per year plus VAT at RRP, or roughly £215 per year on the published annual deal. Add the bundled payroll for up to 5 employees and there is no extra charge for a single PAYE submission, which is one of the clearer pricing wins against Xero and QuickBooks Online, both of which charge separately for payroll.

Core features in depth

Invoicing and quotes

KashFlow supports recurring invoices, quotes that convert into invoices, customer statements, credit limits and online payment links via IRIS Pay and other payment gateways. The Starter plan caps at 10 invoices per month, which is genuinely restrictive once a business is trading; most users land on Business for the unlimited allowance. Templates are customisable but the design controls feel of an earlier era compared with Xero or FreshBooks.

Bank feeds and reconciliation

Open Banking feeds connect to all major UK high-street banks. Reconciliation is straightforward, with rules for repeat transactions and bulk categorisation. Starter is capped at 25 reconciled transactions per month, which again pushes most users to Business. Multiple bank accounts are supported across both plans.

VAT and MTD

KashFlow has been MTD for VAT compliant since the regime started in April 2019 and was one of the first cloud tools to receive HMRC recognition. VAT returns are filed directly from inside the software. Cash, accrual, flat rate and standard schemes are supported, as is the construction industry CIS domestic reverse charge.

Payroll

KashFlow includes payroll for up to 5 employees on both plans. It handles PAYE, NIC, statutory pay, pension submissions to NEST and the Pensions Regulator, and end-of-year reporting. For larger payrolls, IRIS sells separate payroll products and a managed bureau service.

Reporting

Around 50 standard reports cover P&L, balance sheet, trial balance, aged debtors, aged creditors, VAT, customer and supplier analysis. Reports are exportable to CSV and PDF. The reporting layer is functional rather than rich; there is no equivalent to Xero’s analytics dashboards or QuickBooks Online’s cash flow forecasting beyond the basics.

Expenses, mileage and receipts

Receipt capture, mileage logging and expense tracking are included on both plans, with unlimited receipt uploads. The mobile app handles capture on the go.

Multi-currency and multi-user

Multi-currency is supported on both plans, with foreign currency invoicing and reporting. Multi-user access requires the Business plan; Starter is single-user only.

MTD and HMRC compliance

KashFlow is HMRC-recognised for Making Tax Digital for VAT. Submissions go directly from the platform; no bridging software is needed for VAT-registered businesses on either plan.

For Making Tax Digital for Income Tax Self Assessment (MTD ITSA), which begins to apply from April 2026 for sole traders and landlords with qualifying income above £50,000 (and from April 2027 for those above £30,000), IRIS has confirmed KashFlow will support quarterly updates. Sole traders should check the latest IRIS roadmap before relying on it for the first ITSA filing window, since cadence and scope have shifted across the wider market.

For Corporation Tax, KashFlow is a bookkeeping tool, not a CT filing tool. Trial balance data flows into IRIS Accounts Production via KashFlow Connect, where the practice handles CT600 filing.

CIS construction businesses are supported for domestic reverse charge VAT and basic CIS handling.

Integrations

Bank feeds

Open Banking connections cover Barclays, HSBC, NatWest, Lloyds, Santander, Royal Bank of Scotland, Bank of Scotland, Monzo, Starling, Tide, Revolut Business, Wise and others, plus credit card feeds.

Payments

IRIS Pay is the in-house payment gateway. Stripe, GoCardless and PayPal are also supported for online invoice payments.

IRIS ecosystem

This is where KashFlow has structural advantages over standalone competitors for accounting practices.

• IRIS KashFlow Connect sits between client books and the practice
• IRIS Accounts Production receives the trial balance for statutory accounts and Corporation Tax
• IRIS Personal Tax handles director self assessment
• IRIS Elements offers an integrated cloud accountancy suite with shared client lists
• Senta practice management ties workflow and client portals together

For an IRIS practice, KashFlow effectively becomes the client bookkeeping layer in a single-vendor stack.

Third-party app marketplace

The third-party marketplace is significantly smaller than Xero’s 1,000+ apps or QuickBooks Online’s catalogue. Connections exist for the major payment processors, e-commerce tools (limited), payroll add-ons and CRM, but the breadth and depth are notably narrower than the bigger players. Power users who depend on niche apps for inventory, time tracking, project profitability or e-commerce sync should map their stack carefully before committing.

Pros

• HMRC-recognised for MTD for VAT since the start of the regime, with direct submission included on every plan
• UK-only focus, no multi-jurisdiction noise; every menu, report and form is built for UK rules
• Payroll for up to 5 employees included on both plans at no extra cost, where Xero and QuickBooks Online charge separately
• CIS domestic reverse charge VAT support for construction sector users
• IRIS practice ecosystem, including KashFlow Connect, Accounts Production, Personal Tax and Senta, which makes it a clean fit for IRIS firms
• Multi-currency on both plans, including Starter, which Xero restricts to its top tier
• Lower published price than Xero or QuickBooks Online on the entry tier, especially with introductory discounts
• Cloud-based with UK data hosting and a working mobile app for receipt capture and on-the-go invoicing

Cons

• The user interface feels dated compared with Xero, QuickBooks Online and FreeAgent, which have all redesigned in the last few years
• Starter plan caps are tight, with 10 invoices and 25 reconciled bank transactions a month pushing most real businesses to Business
• Smaller third-party app marketplace than Xero or QuickBooks Online, limiting integrations for inventory, e-commerce, time tracking and niche workflows
• Reporting is functional but basic, with no advanced analytics, forecasting or custom dashboards equivalent to Xero Analytics
• Public review sentiment is mixed, with recurring complaints about support response times since the IRIS acquisition
• Mobile app ratings are weak on both iOS and Android, with users reporting reliability issues
• No deep project profitability or job costing, which is standard in QuickBooks Online and stronger in FreeAgent for contractors
• Fewer in-product help and onboarding flows than the modern competition

When to pick KashFlow

KashFlow is the right pick when:

• You are a UK sole trader, contractor or small limited company that needs straightforward bookkeeping, VAT and basic payroll without paying separately for each module
• You operate in construction and need CIS domestic reverse charge VAT support out of the box
• You work with an IRIS-aligned accountant who already runs IRIS Accounts Production, Personal Tax or Senta and wants a clean client bookkeeping layer
• You want UK-only software with no multi-region clutter
• You need multi-currency invoicing on a low tier without paying for Xero Established
• You value a lower headline subscription cost over the depth of Xero or QuickBooks Online

When NOT to pick KashFlow

Look elsewhere if:

• You are scaling fast. A growing SME with project tracking, inventory, multi-entity reporting or department-level cost centres is better served by Xero or QuickBooks Online.
• You depend on a wide app marketplace. Xero and QuickBooks Online both have orders of magnitude more third-party integrations.
• You want a modern, polished UI. Xero and FreeAgent both feel newer and friendlier.
• You are a freelancer or contractor wanting full self assessment in the same tool. FreeAgent includes the SA103 self employment pages and dividend planning, which KashFlow does not.
• You want established reporting and forecasting. Sage Accounting and QuickBooks Online both push further on management reporting and cash flow forecasting.
• You are heavily desktop-oriented. Sage 50 still suits firms that prefer locally installed software with optional cloud sync.

Comparable software

KashFlow sits in a crowded UK core bookkeeping segment. Its closest functional rivals are QuickBooks Online, Xero, Sage Accounting, FreeAgent and Clear Books, all of which are HMRC-recognised for MTD for VAT and all of which target some overlap of sole traders and small limited companies. Where Xero and QuickBooks Online compete on platform breadth and integrations, and FreeAgent competes on freelancer-friendly self assessment, KashFlow competes on UK focus, IRIS ecosystem fit and a lower entry price. Pandle and Bokio are worth considering at the free or near-free end if cost is the dominant factor and feature depth is not critical.

FAQs

Is KashFlow MTD compliant?

Yes. KashFlow is HMRC-recognised for Making Tax Digital for VAT and submits returns directly from the platform on every plan, including Starter. IRIS has also signalled support for MTD for Income Tax Self Assessment ahead of the April 2026 start date for the first ITSA cohort.

Who owns KashFlow?

KashFlow is owned by IRIS Software Group, a UK accountancy software vendor whose other products include IRIS Accounts Production, IRIS Personal Tax, IRIS Elements and Senta practice management. The product is sometimes referred to as IRIS KashFlow.

Does KashFlow include payroll?

Yes. Both the Starter and Business plans include integrated payroll for up to 5 employees at no extra cost. For larger payrolls, IRIS sells separate payroll products and a managed bureau service.

How much does KashFlow cost?

Published RRP for 2025/26 is £13.50 per month plus VAT for Starter and £27.50 per month plus VAT for Business. Annual plans are £162 and £291.50 respectively, plus VAT. New customers commonly see introductory discounts of up to 90% for the first six months.

Is KashFlow better than Xero?

For most growing UK SMEs, Xero offers more depth, a much larger app marketplace and a more modern interface. KashFlow tends to win on UK-only focus, included payroll on lower tiers, and integration with the IRIS practice ecosystem. The right choice depends on whether breadth (Xero) or simplicity and ecosystem fit (KashFlow) matter more.

Can KashFlow handle CIS for construction?

Yes. KashFlow supports CIS domestic reverse charge VAT, which is the main compliance requirement for construction sector users on the cash and accrual schemes.

Does KashFlow support multi-currency?

Yes, on both Starter and Business, which is a notable difference from Xero, where multi-currency is reserved for the top tier.

Is there a free trial?

Yes, a 14-day free trial is available on both plans. No card details are required to start.

Does KashFlow integrate with my bank?

KashFlow connects via Open Banking to all major UK high-street and challenger banks, including Barclays, HSBC, NatWest, Lloyds, Santander, Monzo, Starling, Tide, Revolut Business and Wise.

Is KashFlow good for sole traders?

It is competent for sole traders who mostly need invoicing, bank reconciliation and VAT, especially those working with an IRIS-aligned accountant. Sole traders looking for a tool that also produces self assessment SA103 pages should compare it against FreeAgent.

Final summary

KashFlow is a solid, UK-built cloud bookkeeping tool that earns its place in the small business market through HMRC focus, MTD recognition since day one, included payroll for up to 5 employees, and tight integration with the IRIS practice ecosystem. For sole traders, contractors and small limited companies who want the basics done well in a UK-only product, and especially for clients of IRIS-aligned firms, it is a reasonable, lower-cost alternative to Xero or QuickBooks Online.

The trade-offs are real. The interface is older than its rivals, the third-party app marketplace is noticeably smaller, the reporting layer is functional rather than rich, and recent public review sentiment around support has been mixed since the IRIS acquisition. Businesses that expect to scale quickly, depend on a deep app stack, or want best-in-class UX should compare KashFlow against Xero, QuickBooks Online, Sage Accounting and FreeAgent before committing. Try the 14-day free trial before signing up to either monthly or annual billing.

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