The Complete Tax Compliance Suite for UK Practices: How BrightTax and BrightAccountsProduction Replace the IRIS Suite and CCH Central

Key takeaway: For UK accounting practices managing the full tax compliance workflow — statutory accounts production, iXBRL HMRC submission, CT600 corporation tax, SA100 self assessment, partnership returns, and MTD ITSA — the traditional answer has been IRIS suite or CCH Central. Both are deeply capable and deeply embedded in medium-to-large practices. The Bright compliance stack — BrightTax and BrightAccountsProduction, connected natively within the Bright Suite alongside BrightPay, BrightBooks, and BrightManager — provides the same core compliance outputs at a price point that is accessible to practices from sole practitioners through growing firms, with the additional benefit of the payroll-to-tax-to-accounts integration that IRIS and CCH achieve only within their own closed ecosystems.

The decision to build a practice around a software suite — rather than assembling point solutions — is one of the most consequential technology choices a practice makes. A suite approach means all the pieces speak to each other: accounts figures flow into tax returns, payroll data flows into self assessment, practice management tracks compliance across the whole portfolio. A point solution approach means every data connection is a manual step, every update is a transfer risk, and the practice’s operational efficiency is bounded by how well the integrations hold together.

IRIS and CCH have built their dominant market positions on this suite logic. IRIS Personal Tax knows about IRIS Accounts Production. CCH Central connects CCH Tax to CCH Accounts Production to CCH Practice Management. For practices committed to one of these ecosystems, the integration value is genuine. The question in 2026 is whether Bright’s connected compliance stack — BrightTax, BrightAccountsProduction, BrightPay, BrightManager — offers a comparable suite logic at a price point that challenges IRIS and CCH in the mid-market.

The Compliance Workflow: What a Complete Suite Must Cover

A practice’s tax compliance workflow has five interconnected stages:

Stage 1 — Bookkeeping. The client’s transactions are recorded, categorised, and reconciled against bank statements. For clients on BrightBooks, this stage produces a live trial balance that feeds directly into accounts production.

Stage 2 — Accounts production. The trial balance is used to prepare statutory accounts — FRS 102, FRS 102 Section 1A, or FRS 105 — with iXBRL tagging for HMRC and filleted accounts for Companies House. In the IRIS suite, this is IRIS Accounts Production. In CCH Central, this is CCH Accounts Production. In the Bright stack, this is BrightAccountsProduction.

Stage 3 — Corporation tax. The accounts profit forms the starting point for the CT600 computation. Capital allowances, R&D claims, loss relief, marginal relief, and the iXBRL accounts are all handled in the CT600 software. In IRIS, this is IRIS Business Tax. In CCH, this is CCH Corporation Tax. In the Bright stack, this is BrightTax.

Stage 4 — Self assessment. Director-shareholders, partners, and individual clients file SA100 returns. Employment income from PAYE, dividend income, rental income, and capital gains are all included. In IRIS, this is IRIS Personal Tax. In CCH, this is CCH Personal Tax. In the Bright stack, this is BrightTax (covering both SA100 and CT600 in the same platform).

Stage 5 — Practice management. Deadlines, job status, client communications, and workflow are tracked across the whole portfolio. In IRIS, this is IRIS Practice Management. In CCH, this is CCH Central’s workflow module. In the Bright stack, this is BrightManager.

The IRIS Suite: Strengths and Constraints

Strengths. IRIS is the dominant suite in medium-to-large UK practices for good reasons. IRIS Accounts Production and IRIS Personal Tax are deeply developed products with years of refinement. The integration between them — accounts figures flowing into the CT600, partnership allocations flowing to partner SA returns — is seamless within the IRIS ecosystem. IRIS Practice Management provides portfolio-wide compliance visibility. HMRC recognition across all filing types is well-established.

Constraints. IRIS is an enterprise product priced for enterprise practices. The total cost of the IRIS suite — accounts production, personal tax, business tax, practice management — is structured for firms with the scale to absorb it. For practices below 15–20 fee earners, IRIS typically costs more than the efficiency gain justifies, particularly where the practice is not using IRIS across all modules (a practice using IRIS Personal Tax but not IRIS Accounts Production gets less of the integration value and pays a premium price for it). IRIS is also predominantly a desktop-installed product with cloud overlay, rather than cloud-native — a consideration for practices moving toward fully cloud-based operations.

CCH Central: Strengths and Constraints

Strengths. CCH (Wolters Kluwer) is the enterprise standard in Top 100 and large regional firms. CCH Accounts Production is the most comprehensive accounts production tool in the UK market for complex group structures, consolidated accounts, and FRS 101 large company work. CCH Tax covers the full range of return types with deep functionality. For practices at the largest end, CCH’s breadth and depth is hard to match.

Constraints. CCH is the most expensive suite in the market, with pricing to match its enterprise positioning. Implementation is complex, training requirements are significant, and the platform is best suited to practices with dedicated software management resource. For practices below 30–40 staff, the cost-to-capability ratio of CCH is rarely justified. CCH has been slower than some competitors to develop cloud-native capability.

The Bright Compliance Stack: How It Competes

BrightAccountsProduction covers the Stage 2 accounts production requirements: FRS 102, FRS 102 Section 1A (with 2026 revisions), FRS 105, iXBRL tagging, Companies House filleted accounts, trial balance import from BrightBooks or CSV. For practices that previously used VT Final Accounts, Digita (at the smaller end), or are evaluating IRIS Accounts Production, BrightAccountsProduction provides the necessary compliance outputs.

BrightTax covers both CT600 (Stage 3) and SA100 (Stage 4) in a single platform — a meaningful simplification over IRIS and CCH, which use separate products for personal and business tax. This means the practice manages one platform rather than two for the bulk of its tax filing workflow. BrightTax covers CT600 with capital allowances, R&D RDEC, loss relief, iXBRL submission; SA100 with all supplementary pages; SA800 partnership returns; and MTD ITSA quarterly submissions and final declarations.

BrightPay integration (Stage 4 — employment income). The connection between BrightPay and BrightTax means that employment income from PAYE — for director-shareholder clients processed on BrightPay — flows directly into the SA100 computation without re-keying. IRIS achieves a similar connection within its payroll-to-personal tax link (for practices using IRIS Payroll), and CCH does not natively cover payroll. For practices using BrightPay (the leading payroll bureau platform in the UK and Ireland), this is a direct workflow benefit.

BrightManager (Stage 5 — practice management). BrightManager provides job management, deadline tracking, and automated client communications across the whole practice compliance portfolio — tracking accounts production, tax returns, and payroll compliance in a single view connected to both BrightAccountsProduction and BrightPay.

When the Bright Stack is the Right Choice

The Bright compliance stack is the strongest choice for practices in these scenarios:

Practices already using BrightPay. If the practice’s payroll bureau runs on BrightPay, adding BrightTax and BrightAccountsProduction creates a connected compliance stack with the payroll-to-SA integration as an immediate operational benefit. This is the single strongest argument for the Bright stack over assembling separate solutions.

Practices looking to leave IRIS or CCH on cost grounds. For practices paying IRIS or CCH suite pricing without using the full suite value — using IRIS Personal Tax but not IRIS Accounts Production, for example — the Bright stack offers comparable compliance capability at lower cost, with a more cohesive integration model if BrightPay is also in use.

Growing practices at the transition from point solutions to suite. A practice currently running TaxCalc for tax, VT for accounts, and a separate payroll tool has the most to gain from consolidating onto a connected suite. The Bright stack offers that consolidation without the IRIS or CCH price point.

Practices with significant director-shareholder client portfolios. Where a high proportion of clients are owner-managed companies — with both CT600 corporation tax and SA100 self assessment requirements — BrightTax’s single-platform coverage of both return types, connected to BrightAccountsProduction for accounts, is a particularly clean workflow.

Frequently Asked Questions

This content may have been developed with the assistance of AI tools. Content is reviewed by a member of the Bright team before publication. Guidance on legislation can be obtained from your industry body.