Canada built its prosperity by trading with the world — and in the process let its own internal market slide, from 26.7% of GDP in 1981 to about 17% today. The barriers between provinces never came down; international trade simply grew more than twice as fast. Now, with the external engine under threat from US tariffs, the home market Canada neglected is its most obvious untapped source of growth: worth $527 billion already, and an estimated $50–210 billion more if the barriers finally fall.
Related metrics. This sits within Canada's broader economic competitiveness. See also:
Unlike most metrics in this tool, there is no clean G7 comparison here: Canada is one country running thirteen internal trade regimes, so the benchmark is Canada against its own potential. The story the data tells is not collapse but neglect. Internal trade has grown enormously since 1981 — up more than 440% — but international trade grew more than twice as fast after the Canada–US Free Trade Agreement (1989) and NAFTA (1994), so the internal market quietly shrank as a share of the economy. The frictions that hold it back — mismatched regulations, licensing rules, procurement preferences, professional-mobility restrictions — are not market failures. They are governance choices the federation has promised to dismantle for thirty years and has not.
Interprovincial trade, 2024
$527B
Goods & services moving across provincial borders — about 17% of GDP, down from 26.7% in 1981.
Real GDP forgone (IMF, 2026)
~$210B
Estimated long-run gain from removing internal barriers — roughly 7% of GDP.
Avg. internal tariff-equivalent
9%
Regulatory barriers nationally; over 40% in health care & education, where licensing limits mobility.
A four-decade retreat
The decline is steady and old. Internal trade was worth 26.7% of GDP in 1981; by the early 1990s — as the Canada–US Free Trade Agreement and then NAFTA pulled the economy outward — it had fallen below 19%, and it has hovered there ever since, easing to roughly 17% in 2024. The internal market did not contract in dollar terms; it was simply allowed to stagnate while the country reorganised itself around exports to a single, now-unreliable partner. Measured against total trade, the internal share fell even harder — from just over half in the early 1980s to under a third by 1999 — before clawing back slightly.
Internal trade as a share of GDP and of total trade, 1981–2024 (%)
Source: Statistics Canada, Table 36-10-0222-01, "Internal trade flows and frictions" (released 2025-03-19), annual 1981–2023. The 2024 share-of-GDP point (~17%; $527.2B) is from StatCan's December 2025 interprovincial-trade release and rests on a slightly later vintage; shown as the final marker. "Share of total trade" = internal trade ÷ (internal + international) trade.
Services are the wall, not goods
The instinctive picture of interprovincial barriers — a truck stopped at a provincial line over different container rules — is mostly the wrong one. The expensive frictions are in services, where licensing, accreditation, and professional-mobility rules differ province to province. The IMF estimates that about four-fifths of the potential GDP gain comes from liberalising services, and the implied tariff is highest in the most heavily regulated of them.
Internal trade costs expressed as a tariff equivalent, by category (%)
Source: Goods and services-average figures — Macdonald-Laurier Institute (2022), non-distance internal trade costs expressed as tariff equivalents (goods ≈10%, services ≈29%). Health care & education figure — IMF (2026), "more than 40%." The two studies use different methods and vintages; bars indicate the gradient from goods to highly-regulated services, not a single consistent series. The IMF's all-sector national average is 9%.
How big is the prize?
So what is the neglected market worth? Because there is no international league table for internal barriers, the natural benchmark is the size of the gain from removing them. Successive studies — most authored or co-authored by economists working with the IMF and the University of Calgary's Trevor Tombe — put the long-run real GDP gain in a wide band, from roughly $50 billion at the low end to about $210 billion. The estimates are contested: critics, including the Canadian Centre for Policy Alternatives, argue the modelling overstates the realistic gain. But the direction is not in dispute — and with the external engine faltering, this is the rare growth that Canada controls entirely.
Estimated long-run real GDP gain from eliminating internal trade barriers (published ranges, C$ billions)
Source: IMF Working Paper 19/158, Internal Trade in Canada: Case for Liberalization (2019), $50–130B (≈3–7% of GDP); Statistics Canada, internal-trade summary (2024), $92–200B. The most recent IMF Article IV staff work (2026) puts the gain at roughly $210B (≈7%), shown as the upper marker; the Canadian Centre for Policy Alternatives contests these magnitudes. Ranges reflect different models and vintages and are not strictly comparable.
Why this sits under Governing. These barriers are not a market failure — they are a governance choice. Each one is a rule some government chose to keep, and the federation has agreed for decades that it should be dismantled (the 1994 Agreement on Internal Trade, the 2017 Canadian Free Trade Agreement) without finishing the job. The upside is unusually clean: it needs no new spending and no foreign partner, only governments honouring rules they already signed. The test of this pillar — does government deliver? — has rarely had a cheaper answer available.
Findings
Finding 1
The barrier is bigger than the US tariff wall
The IMF puts the average internal barrier at a 9% tariff equivalent — higher than the roughly 6% average US tariff on Canada estimated by the Bank of Canada for late 2025. Canada taxes its own internal trade more heavily than its largest trading partner taxes it.
Finding 2
Four-fifths of the prize is in services
Goods barriers are real but modest (~10% tariff equivalent). Services run far higher — about 29% on average, and over 40% in health care and education — because professional licensing and accreditation rarely transfer across provinces.
Finding 3
The smaller the province, the higher the cost
Large, diversified provinces face relatively low internal trade costs; small and remote ones face multiples more. The IMF estimates Prince Edward Island could raise real GDP per worker by nearly 40 percentage points, with Atlantic Canada and the territories gaining most.
Finding 4
Neglect, not collapse — which means it's recoverable
Internal trade grew more than 440% since 1981, but international trade grew more than twice as fast, so the internal share of GDP fell from 26.7% to ~17%. The market wasn't lost; it was left to stagnate. That makes the upside recoverable — and even sceptics who dispute the headline GDP gains concede the low end ($50B) exceeds most single federal programs.
Definitions. "Internal" or "interprovincial" trade barriers are non-geographic frictions — regulatory differences, licensing, procurement preferences, professional-mobility rules — that raise the cost of trade across provincial/territorial lines. They are summarised as a tariff equivalent: the implied tax that would produce the same trade-dampening effect.
No G7 comparison. Unlike other metrics here, there is no clean peer series: comparable countries are not internally fragmented in the same way, and cross-country "internal barrier" estimates are not produced on a consistent basis. The page therefore benchmarks Canada against its own estimated potential and notes the EU single market as the standing contrast for a deep internal market.
Comparability. The GDP-gain estimates come from different models and vintages (IMF 2019 vs 2026; StatCan summary) and are shown as ranges, not a single number. The sector chart combines Macdonald-Laurier (goods/services) and IMF (health/education) figures; methods differ, so the bars indicate a gradient rather than one consistent series. The 9% national average and the goods/services figures are not strictly additive. The 1981–2023 trend is one continuous StatCan series (Table 36-10-0222-01); the 2024 ~17% point comes from a later StatCan release and is shown as a final marker, not spliced into the historical series.
Contested magnitudes. The headline gains rest on general-equilibrium modelling that infers barriers from trade patterns rather than measuring each rule directly. Critics argue this overstates achievable gains. The page presents the full range and the critique rather than a single point estimate.
Companion workbook. The editable series live in Governing_Interprovincial-Trade-Barriers_Data.xlsx. Only series the workbook contains are charted.
Page last reviewed June 2026 · Data current to 2024 — the latest internal-trade year published by Statistics Canada