Game studio tax: stacking OIDMTC and SR&ED without one credit eating the other

Two credits, one payroll — the allocation problem

The Ontario Interactive Digital Media Tax Credit pays 40% of eligible Ontario labour on a game you develop and own (35% on fee-for-service work), plus up to $100,000 of marketing and distribution spend per non-specified product. SR&ED pays a Canadian-controlled private corporation a 35% refundable federal credit on qualifying experimental development, with Ontario adding a refundable 8% innovation credit and a 3.5% non-refundable one. The catch that decides everything: labour claimed under OIDMTC is carved out of your SR&ED pool, and provincial credits grind the federal claim as government assistance. Claim carelessly and you convert 40-cent dollars into 35-cent dollars — or trigger a review that stalls both refunds.

The waterfall: where each labour dollar goes

We split the studio's payroll into buckets before the claims are drafted, because the credits reward different work.

Hedge rates: effective yield beats headline rate

On paper SR&ED wins — the stacked federal and Ontario credits land in the low 40s per eligible dollar for a small CCPC once the grind is worked through, against OIDMTC's flat 40%. In practice the spread is a rounding error, and the risk profiles are not. SR&ED claims face technical review, and a claim that fails leaves you with nothing on those hours if the OIDMTC filing window has closed. So we run a hedge: labour that clearly meets the technological uncertainty test goes to SR&ED with contemporaneous evidence — tickets, experiment branches, records of failed approaches; borderline hours go to OIDMTC, where eligibility is about what the product is, not how uncertain the work was. A cent of headline rate is not worth a review you might lose.

Who does the work shifts the math too. SR&ED adds a 55% proxy uplift on top of eligible employee salaries but counts arm's-length contractor invoices at only 80%, so a task that could be staffed either way earns meaningfully more credit in-house. When a studio leans on freelancers for experimental work, we flag the credit cost before the contracts are signed, not after the T661 is drafted.

Timing, certification, and the T2 that carries it all

OIDMTC runs through Ontario Creates certification, and the queue is measured in months — you apply once the product is done, file the credit on Schedule 560 of the T2, and CRA releases the refund when the certificate number is in place. SR&ED rides Form T661, due no later than 18 months after year-end, but filed with the original T2 whenever possible because first-filed claims are processed fastest. We sequence both against your cash needs, and we protect the thing the whole structure depends on: CCPC status. A US parent, a control-shifting investor round, or a casual Delaware flip converts your 35% refundable SR&ED rate into a non-refundable shadow of itself — check the ownership math on our game studio cross-border tax page before signing a term sheet.

The revenue side of the return

Steam, console, and mobile payouts arrive in USD from non-resident platforms, so they are zero-rated for HST — meaning a registered studio collects almost nothing and recovers HST on rent, contractors, and middleware as refunds every period. Platform statements, deferred-revenue timing on bundles, and FX conversion all have to tie into the T2, which is a books problem before it is a tax problem — our game studio bookkeeping page covers the monthly side. File W-8BEN-E with each platform so US withholding never starts; recovering tax that should never have been held back is slower than preventing it.

Source: CRA — SR&ED tax incentive program.