State Apportionment Maintain a Controlled Data Collection Process

State Apportionment

Gather, calculate and review state apportionment

Managing the state apportionment process efficiently is fundamental to reducing risk and maintaining compliance for your organization’s tax department. Create consistency for your processes by collecting, tracking, and retaining data with our trusted software, ONESOURCE State Apportionment.

Standardize your data

ONESOURCE State Apportionment helps you gather, calculate, and review state tax apportionment in a central location. Through automation, you can manage many sources of data in a consolidated, consistent way and leave a clear audit trail. Most importantly, you shift time spent on manual efforts to value-added activities for your organization.

Move beyond the spreadsheet

ONESOURCE State Apportionment provides the ability to instantly create rate reports or calculate apportionment across your entire company.

Ease your audit

On the back-end, ONESOURCE State Apportionment allows you to create meticulous audit trails that track settlements and control data access.

Plan & model

ONESOURCE State Apportionment functionality can model new scenarios in order to gain extra insight into your apportionment options.


As part of the ONESOURCE suite, State Apportionment includes seamless integration with ONESOURCE Income Tax, ONESOURCE Tax Provision and Estimated Payments.

Customer Insights

We brought in ONESOURCE State Apportionment to help us do our compliance for state returns and provide information to auditors faster compared to our former manual processes.

Rita Rothman
Teva Pharmaceuticals