Who We Help · Game Studios · Cross-Border Tax
Steam payouts, treaty claims and the OIDMTC-SR&ED stack
Valve, Sony, Microsoft and Nintendo pay Canadian studios from US entities, and US law treats those platform payouts as royalties — 30 percent withholding by default. The Canada-US treaty exempts payments for the use of computer software and copyright, so a studio with a valid W-8BEN-E on file gets paid gross; a studio without one funds the IRS interest-free. The other half of this file is domestic: OIDMTC and SR&ED can each refund a third or more of qualifying labour, but never the same payroll dollar twice.
By the AnalytIQ Accounting team · Last reviewed: August 12, 2026
Platform payouts are royalties, and royalties get 30 percent by default
Steamworks onboarding includes a US tax interview for a reason: Valve pays your revenue share as a US-source royalty, and without treaty paperwork it must withhold 30 percent. Under the Canada-US treaty, payments for the use of computer software and copyright are exempt from withholding — so a Canadian studio that completes the interview with a W-8BEN-E claiming treaty benefits is paid gross. Two setups go wrong constantly: a founder completes the interview personally when the Steam distribution agreement belongs to the corporation, and a W-8BEN-E silently expires — it is valid for three calendar years, and an expired form restarts the 30 percent without a warning email you will notice.
If tax has already been skimmed, the studio recovers it from the IRS, not CRA: the platform issues a 1042-S, and a corporation files an 1120-F to claim the refund. CRA will not give a foreign tax credit for US tax the treaty says was never owed.
| Revenue stream | US tax picture | Paperwork |
|---|---|---|
| Steam | US-source royalty; zero withholding with a treaty claim | W-8BEN-E in the Steamworks tax interview, completed as the corporation |
| Console storefronts | Same mechanics — each platform runs its own tax onboarding | Keep treaty claims current across every developer portal, with renewal dates diarized |
| US publisher deal | Advances and royalty shares under contract; withholding language matters | W-8BEN-E to the publisher; reconcile the 1042-S against the royalty statements |
| Crowdfunding and merch | Business income, not royalties; physical rewards shipped to US backers can trigger state sales tax | Merchant-of-record and fulfilment choices decide who handles that |
OIDMTC and SR&ED: two credits, one payroll, no double counting
The Ontario Interactive Digital Media Tax Credit refunds 40 percent of qualifying Ontario labour on products you develop and market yourself (35 percent on fee-for-service work), certified through Ontario Creates. SR&ED refunds up to 35 percent federally for a CCPC on experimental development — the engine work, novel netcode and rendering problems, not content production. The rule that decides your refund: the same salary dollar cannot sit in both claims. We map timesheets so R&D-flavoured labour goes where it earns most, and so one claim's assistance does not silently grind the other's expenditure pool.
The cross-border wrinkle founders miss: taking US investment through a Delaware flip or losing Canadian-controlled status can end CCPC treatment — and with it the enhanced refundable SR&ED rate. That trade-off should be priced before the term sheet is signed, not discovered at filing time.
The rest of the border file
Selling worldwide through platforms does not create US tax by itself: with no permanent establishment, the treaty leaves the studio's profits taxable only in Canada. A US office, employee or warehouse changes that answer and adds state nexus on top. Alongside that sit the quiet compliance items: T1135 once foreign accounts and property cross $100,000 CAD, a consistent FX policy for USD payouts, and gross-versus-net discipline — platforms remit your share after their cut, and books that record only net deposits understate both revenue and fees.
GST/HST runs in the studio's favour: licensing your game to non-resident platforms is zero-rated, so you collect nothing on Steam revenue while claiming input tax credits on rent, software and contractors. Direct sales to Canadian customers stay taxable. Sales tax on the storefront side mostly is not your problem — Valve and the console makers act as merchant of record and handle US state sales tax and foreign VAT on consumer sales — but selling builds or DLC directly from your own site puts that burden back on you.
Talent flows the other way too. Paying a US-based composer, artist or porting house involves no Canadian withholding when they work from the US — the priority is a contract that actually assigns the IP, because OIDMTC and SR&ED claims, publisher due diligence and an eventual acquisition all trace back to who owns the code and assets. Flying a US contractor into your Ontario office to work on-site changes the answer: fees for services performed in Canada trigger Regulation 105 withholding of 15 percent and a T4A-NR.
Where this fits
Cross-border withholding sits on top of the studio's regular file — payroll, milestone revenue, credit claims and the T2 — which our game studio tax services page covers. For W-8BEN-E setups, 1120-F recoveries and structure calls before US money arrives, the full practice is at cross-border tax services. Boutique firm, fixed fees quoted after a discovery call.
Source: CRA — Scientific Research and Experimental Development (SR&ED) tax incentive program.
Common questions.
Steam is withholding 30 percent from our payouts — how do we stop it?
Complete the Steamworks tax interview as the corporation with a W-8BEN-E claiming Canada-US treaty benefits; software and copyright royalties are treaty-exempt, so properly claimed payouts arrive gross. Tax already withheld is recovered by filing an 1120-F with the 1042-S Valve issues.
Can we claim OIDMTC and SR&ED on the same game?
Yes — on the same project, but never on the same labour dollar. The split usually falls along R&D versus production lines, and timesheet mapping decides how much each claim is worth, so we design that allocation deliberately rather than at year end.
Should we flip into a US company to take American investment?
Sometimes, but price it first: losing CCPC status typically ends the enhanced refundable SR&ED rate, which for many indie studios is worth more than the investor convenience. This is a decision to model before signing, not after.
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