ONESOURCE Tax Provision vs IRIS Business Tax

ONESOURCE Tax Provision8.8Visit IBIRIS Business Tax8.7Visit

Higher score ONESOURCE Tax Provision #7 in Corporate Tax Software 8.8/10 Pricing on request ✓ 0 of 5 features Visit ONESOURCE

vs

IB IRIS Business Tax #8 in Corporate Tax Software 8.7/10 Pricing on request ✓ 3 of 5 features Visit IRIS

• ONESOURCE Tax Provision fits best

  ASC 740 and IAS 12 provision teams

• IRIS Business Tax fits best

  UK practices using IRIS systems

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Side by side

Feature	ONESOURCE Tax Provision 8.8/10 Visit ↗	IBIRIS Business Tax 8.7/10 Visit ↗
At a glance
Editor score	8.8	8.7
Ranking	#7 in Corporate Tax Software	#8 in Corporate Tax Software
Best for	ASC 740 and IAS 12 provision teams	UK practices using IRIS systems
Pricing model	Paid	Paid
Starting price	Pricing on request	Pricing on request
Free plan	Not checked yet	Not checked yet
Free trial	—	—
Integrations	3 integrations	9 integrations
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features ONESOURCE Tax Provision 0/5 · IRIS Business Tax 3/5
Electronic filing	Not checked yet	✓ (best)
Consolidated returns	Not checked yet	Not checked yet
Tax provision support	Not checked yet	Not checked yet
Accounting integrations	Not checked yet	✓ (best)
Approval workflows	Not checked yet	✓ (best)
Specs
Jurisdictions covered	Not checked yet	Not checked yet
Deployment	Not checked yet	Hybrid
Our review
Pros	Supports both ASC 740 and IAS 12 current and deferred provisions Drills from consolidated amounts to supporting detail Connects Excel workpapers and configurable ERP journal entries	Handles corporate, partnership, and sole-trader tax computations Files directly to HMRC with submission-status tracking Imports accounts data and supports iXBRL and group relief workflows
Cons	Pricing requires contact with sales Focused on provision rather than complete return preparation ERP integration depends on the systems and applications in use	Pricing requires contact with sales Its strongest fit is practices using UK tax workflows Integration depth is centered on IRIS and listed accounting systems
Our verdict	ONESOURCE Tax Provision is corporate tax provision software for tax and finance teams managing complex entities and jurisdictions. It supports ASC 740 and IAS 12 calculations across current and deferred tax workflows, with automated tax… Read the review →	IRIS Business Tax is tax return software for accountancy practices and in-house finance teams. It covers corporate, partnership, and sole-trader tax computations, with direct HMRC filing and submission-status tracking. The product is… Read the review →

Strengths and trade-offs

• ONESOURCE Tax Provision — where it wins

  • Supports both ASC 740 and IAS 12 current and deferred provisions
  • Drills from consolidated amounts to supporting detail
  • Connects Excel workpapers and configurable ERP journal entries

  Where it doesn't

  • Pricing requires contact with sales
  • Focused on provision rather than complete return preparation
  • ERP integration depends on the systems and applications in use

• IRIS Business Tax — where it wins

  • Handles corporate, partnership, and sole-trader tax computations
  • Files directly to HMRC with submission-status tracking
  • Imports accounts data and supports iXBRL and group relief workflows

  Where it doesn't

  • Pricing requires contact with sales
  • Its strongest fit is practices using UK tax workflows
  • Integration depth is centered on IRIS and listed accounting systems

• ONESOURCE Tax Provision8.8/10 · Pricing on request

  A focused choice for ASC 740 and IAS 12 provision workflows.

  Visit ONESOURCEFull verdict →
• IBIRIS Business Tax8.7/10 · Pricing on request

  A broad UK tax workflow for practices already working in the IRIS ecosystem.

  Visit IRISFull verdict →