Tax Series vs ONESOURCE Tax Provision

Tax Series9.0Visit ONESOURCE Tax Provision6.8Visit

Higher score Tax Series #1 in Corporate Tax Software 9.0/10 Pricing on request ✓ 0 of 5 features Visit Tax Series

vs

ONESOURCE Tax Provision #7 in Corporate Tax Software 6.8/10 Pricing on request ✓ 0 of 5 features Visit ONESOURCE

• Tax Series fits best

  Multinational U.S. corporate tax teams

• ONESOURCE Tax Provision fits best

  ASC 740 and IAS 12 provision teams

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Side by side

Feature	Tax Series 9.0/10 Visit ↗	ONESOURCE Tax Provision 6.8/10 Visit ↗
At a glance
Editor score	9.0	6.8
Ranking	#1 in Corporate Tax Software	#7 in Corporate Tax Software
Best for	Multinational U.S. corporate tax teams	ASC 740 and IAS 12 provision teams
Pricing model	Paid	Paid
Starting price	Not published	Not published
Free plan	Not published	Not published
Free trial	—	—
Integrations	4 integrations	3 integrations
Built for	Mid-market, Enterprise	Mid-market, Enterprise
Features Tax Series 0/5 · ONESOURCE Tax Provision 0/5
Electronic filing	Not published	Not published
Consolidated returns	Not published	Not published
Tax provision support	Not published	Not published
Accounting integrations	Not published	Not published
Approval workflows	Not published	Not published
Specs
Jurisdictions covered	Not published	Not published
Deployment	Not published	Not published
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	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
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 Focused on provision rather than complete return preparation ERP integration depends on the systems and applications in use
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 →	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 →

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

• 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

• Tax Series9.0/10 · Pricing on request

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

  Visit Tax SeriesFull verdict →
• ONESOURCE Tax Provision6.8/10 · Pricing on request

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

  Visit ONESOURCEFull verdict →