Saskatchewan GST + PST: rates, registration and filing

Saskatchewan PST — single-stage retail, not value-added

Like British Columbia and Manitoba, Saskatchewan operates a Provincial Sales Tax (PST) outside the federal GST framework. PST is a single-stage retail sales tax — only the final sale to the consumer triggers it. PST paid on business inputs (commercial rent, equipment, services, professional fees) is generally NOT recoverable as input tax credits. This contrasts sharply with HST and QST provinces, where the provincial portion flows through the value-added chain and businesses recover it on inputs.

The 2018 PST Act reforms expanded the Saskatchewan tax base to include many services that were previously exempt — insurance premiums, accounting and legal services, real-estate services, telecommunication services, and computer services (including SaaS used by Saskatchewan customers since April 2018). The expansion brought Saskatchewan into closer alignment with BC's PST framework but kept the rate at 6% (vs BC's 7% and Manitoba's 7%).

SaaS, software, and the digital-services tax base

Saskatchewan PST applies to prewritten software (canned software) regardless of delivery method, including SaaS sold to Saskatchewan consumers, downloaded software, and remotely-accessed cloud applications. The 2018 expansion made this explicit. Custom software developed for a single customer remains exempt. Non-resident vendors selling software, digital products, or telecommunication services to Saskatchewan consumers must register for PST if they meet the prescribed business presence or significant Saskatchewan-sales thresholds.

For SaaS companies, the practical compliance shape: register with Saskatchewan Ministry of Finance, charge 6% PST + 5% GST = 11% combined on Saskatchewan-customer billings, file SaskPST returns separately from CRA GST returns. HelloBooks handles both registrations and routes Saskatchewan-bound invoices to the 11% combined rate automatically.

Filing cadence and SaskTaxInfo portal

GST follows CRA frequencies: annual under CAD 1.5M, quarterly $1.5M-6M, monthly above $6M, filed via NETFILE. SK PST follows Ministry of Finance assignments: monthly if monthly tax over CAD 7,200 (~$120K annual taxable sales), quarterly for $1,200-$7,200/month, annually for under $1,200/month. PST returns are filed via the SaskTaxInfo portal by the 20th of the month following the period. The two systems' different deadlines (CRA end-of-next-month vs Saskatchewan 20th-of-next-month) trip up multi-jurisdiction operators — HelloBooks tracks both deadlines independently.