CalculusTax determination & withholding for nonresident employees
Sprintax Calculus determines the correct tax residency and withholding for every nonresident employee, student worker, and vendor — before the first payment is ever made.
What Sprintax Calculus does
Residency determination
Substantial presence and treaty analysis handled automatically for each individual.
Withholding calculations
Accurate federal and state withholding rates, updated as tax law changes.
Document generation
Produce W-8BEN, 8233, and treaty statements ready for signature.
API & payroll integration
Feed determinations straight into your payroll and HR systems.
Simple from start to finish
- 1
Invite your nonresident population to complete a secure online profile.
- 2
Calculus determines residency, treaty eligibility, and withholding.
- 3
Required forms are generated and stored automatically.
- 4
Your payroll team receives clean, compliant data — in one dashboard.
See Sprintax Calculus in action
Book a personalized demo and we'll show you exactly how it fits your organization.