Alternatives to Hartigan RTI Pro

TaxBandits

TaxBandits suits business owners, tax professionals and service providers handling employment and payroll forms.

HMRC Basic PAYE Tools

It suits employers with fewer than 10 employees who need to calculate payroll tax and report pay information to HMRC.

It is aimed at small businesses and growing or mid-market teams, with the site describing customers from 20 to 1,000 employees.

ADP Workforce Now is presented for organizations with 50–999 or 1,000 or more employees that need payroll and HR functions.

PaymentEvolution

PaymentEvolution’s listed Growth, Business Basic, and Business Plus plans are for a single business running payroll for its own employees.

KLARA is aimed at Swiss SMEs looking to handle administration across accounting, payroll, retail, appointments, and online services.

It suits developers and organizations building payroll systems that need calculations across many tax jurisdictions.

It suits businesses, individuals, nonprofits, and tax professionals filing supported federal forms.

MasterTax suits employers, payroll service providers, and professional employer organizations handling multijurisdictional payroll taxes.

It is intended for payroll vendors, service bureaus, and growing organizations with large, multi-state workforces.

It suits Windows users preparing and submitting listed federal, California, and Minnesota tax forms.

It suits employers and payroll administrators handling South African employer declarations, reconciliations, employee registration, and related account tasks on Windows.

ExpressEfile

It suits small business owners needing online preparation and federal e-filing for listed forms.

Vertex VAT Compliance

It suits multinational organisations managing VAT and GST operations across multiple countries.