Tax Series vs IRIS Business Tax

Tax Series9.4Visit IBIRIS Business Tax8.7Visit

Higher score Tax Series #1 in Corporate Tax Software 9.4/10 Pricing on request ✓ 0 of 5 features Visit Tax Series

vs

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

• Tax Series fits best

  Multinational U.S. corporate tax teams

• IRIS Business Tax fits best

  UK practices using IRIS systems

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Side by side

Feature	Tax Series 9.4/10 Visit ↗	IBIRIS Business Tax 8.7/10 Visit ↗
At a glance
Editor score	9.4	8.7
Ranking	#1 in Corporate Tax Software	#8 in Corporate Tax Software
Best for	Multinational U.S. corporate tax 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	—	—
Deployment	Cloud	Cloud, Self-hosted, Desktop
Platforms	Web	Web
Support	Email, Phone	Email, Phone, Docs
Integrations	4 integrations	9 integrations
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Tax Series 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	Covers U.S. federal, state, and international compliance Combines provision, BEPS reporting, workflows, and entity management Imports general-ledger and financial-system data through web and API access	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	Designed for medium-sized and large multinational companies Licensing requires a contact-sales process Its broad scope may exceed the needs of smaller domestic tax teams	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	Tax Series is a web-based corporate income tax platform from Tax Technologies, Inc. for medium-sized and large multinational companies. It brings U.S. federal corporate tax compliance, state return preparation, multi-jurisdiction… 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

• Tax Series — where it wins

  • Covers U.S. federal, state, and international compliance
  • Combines provision, BEPS reporting, workflows, and entity management
  • Imports general-ledger and financial-system data through web and API access

  Where it doesn't

  • Designed for medium-sized and large multinational companies
  • Licensing requires a contact-sales process
  • Its broad scope may exceed the needs of smaller domestic tax teams

• 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

• Tax Series9.4/10 · Pricing on request

  A broad compliance and provision platform for multinational U.S. tax teams.

  Visit Tax SeriesFull 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 →