Regulatory note: This article reflects the position as of 14 June 2026, based on the local and global minimum top-up tax provisions added to Part Five of Corporate Income Tax Law No. 5520 by Law No. 7524 (Official Gazette 02.08.2024); the qualified service center (QSC) provisions inserted into CITC Art. 10 and Law No. 4875 on Foreign Direct Investments by Law No. 7582 (Official Gazette 04.06.2026, no. 33270); Istanbul Finance Center Law No. 7412; the Local and Global Minimum Top-up Corporate Tax General Communiqué (Official Gazette 26.12.2025, no. 33119); and the OECD GloBE Model Rules. Secondary guidance to Law 7582 is still being issued; confirm the final regulation for any specific transaction.

Turkey’s 100% QSC/IFC Exemption Meets Pillar Two: The QDMTT Clawback and the Substance Shield

A qualified service center operating inside the Istanbul Finance Center can keep 100% of the income it earns from serving foreign group companies outside the corporate tax base. On paper, a flawless incentive. But if that entity belongs to a group above EUR 750 million, there is only one question worth asking: with the return due on 30 June 2026, is Turkey quietly taking this exemption back with its own hand?

60-second summary

QSC income is 95% corporate-tax-exempt, 100% inside the IFC (CITC Art. 10/1-(j), Law 7582); for 20 fiscal years from the period the QSC becomes operational.

For groups above EUR 750m, this exemption pushes the Turkish entity’s GloBE effective rate below 15%. The shortfall is collected at home, by Turkey’s own QDMTT as a top-up.

The only layer that survives is the SBIE (substance-based income exclusion): real payroll + tangible assets. Substance preserves the benefit; a “shell” hands it straight back.

The real loss is not in the headline rate but in the wrong assumption: thinking “I claimed the exemption, done.”

The Exemption Architecture: Three Separate Doors

First, the ground rules — because the most common field mistake is treating different exemptions as one.

1) IFC financial-services-export exemption (Law 7412). Art. 6 of the Istanbul Finance Center Law deducts 75% of financial-service-export income from the tax base; Provisional Art. 1 raises this to 100% for tax periods 2022-2047. Its basis is the IFC Law — not CITC Art. 10.

2) Qualified service center (QSC) exemption (Law 7582 — new). Law 7582 added subparagraph (j) to CITC Art. 10: for companies operating as a qualified service center under Law No. 4875 on Foreign Direct Investments, 95% of the income earned from abroad in that activity is deducted; for IFC-based QSCs holding a participant certificate, the rate is 100%. The deduction runs for 20 fiscal years from when the QSC becomes operational, conditional on the income being transferred to Turkey by the filing deadline. The corporate-tax deduction applies from 1 January 2026.

The QSC definition was added to Law 4875 by Law 7582: a capital company, serving related companies/the group in at least three different countries, deriving at least 80% of annual revenue from foreign related parties. This definition is no accident; it is itself a “are you a real regional hub, or a shell that issues invoices?” test — and, as we will see, it also decides the entity’s fate under Pillar Two.

3) QSC personnel income-tax exemption. Wages paid to QSC personnel are income-tax-exempt up to three times the gross minimum wage (up to five times in the IFC and in presidentially-approved industrial zones). The key point: this sits on the income-tax side; it does not lower the corporate-tax-based effective rate — so it does not trigger a Pillar Two top-up. The threat comes solely from the corporate-tax exemption (100%/95%).

Don’t conflate: The older “service-export” deduction in CITC Art. 10/1-(ğ) (architecture, software, call-center, data storage, education-health; 50% since 2023 via Law 7491) is a SEPARATE regime from the new QSC regime (Art. 10/1-(j), Law 4875). Both are loosely called “service center” incentives, but their basis, rate and conditions differ.

Pillar Two and the QDMTT: Turkey’s Framework

The OECD’s Second Pillar requires multinational groups with EUR 750 million or more in consolidated revenue to be taxed at an effective rate of at least 15% in every jurisdiction. Turkey transposed these rules into Part Five of CITC 5520 via Law 7524: the minimum corporate tax rate is 15%. The threshold is met where the ultimate parent’s consolidated revenue exceeds EUR 750m in at least two of the four fiscal periods preceding the reporting period.

There are two mechanisms. The QDMTT (domestic top-up) collects the gap inside Turkey when the Turkish entity’s effective rate is below 15%. The IIR/UTPR (global) brings in the parent’s jurisdiction. Sequence is decisive: if the QDMTT is “qualified,” Turkey collects the top-up first — no foreign country can. Turkey’s regime is effective from 1 January 2024 and holds qualified QDMTT + QDMTT safe-harbour status with the OECD.

The nuance most executives miss: a “qualified” Turkish QDMTT turns into a disadvantage for the incentive-granting state. Because the low taxation occurs in Turkey, the right to collect the top-up is also Turkey’s — the state takes back with one hand the exemption it gave with the other.

The Intersection: How 100% Exemption Becomes a Top-Up

The mechanics are simple and unforgiving. Once 100% of QSC income is outside the corporate tax base, the corporate tax paid on it ≈ 0. In the GloBE formula (covered taxes ÷ GloBE income), the numerator approaches zero; the result is an effective rate far below 15%. The difference is demanded as a top-up via the QDMTT.

Table 1 — 100% exemption → effective rate → QDMTT top-up (simplified; SBIE effect in the next section)

Item	No exemption (normal)	Exemption, NO substance (“shell”)
QSC foreign income	100,000,000	100,000,000
Tax base (post-exemption)	100,000,000	0
Corporate tax paid (25%)	25,000,000	~0
GloBE effective rate	~25%	~0%
Base topped up to 15%	none	100,000,000
QDMTT top-up (~15%)	0	~15,000,000
Net tax burden	25,000,000	~15,000,000

Simulation note: Figures are simplified to show the GloBE logic; the real computation blends all constituent entities in the jurisdiction, deferred tax and adjustments. The message stands: without substance, roughly 15% of the tax the exemption removed returns as a top-up. The incentive is not “zero tax” as the headline suggests — it is “tax up to the QDMTT.”

The SBIE Shield: How Substance Protects the Incentive

Here is the mechanism that saves the incentive: the SBIE (substance-based income exclusion). GloBE excludes genuine economic activity in each jurisdiction from the top-up base. The exclusion is computed from two items: a percentage of employee payroll plus a percentage of the net book value of tangible assets. The steady-state rate is 5% for each; in the transition it starts higher and declines. Because Turkey began in 2024, the rates applying in 2026 are 9.4% payroll + 7.4% tangible assets.

The amount excluded by the SBIE counts as “routine profit” and is not subject to top-up; only the excess profit is. So a QSC with strong payroll and tangible assets shields most of its exemption; a physically thin structure is left exposed.

A 4-step substance test so your QSC exemption doesn’t erode under the QDMTT

Threshold triage: Is the group’s consolidated revenue above EUR 750m (in 2 of the prior 4 years)? If not, the exemption is fully effective; the QDMTT is not in play.

Measure payroll: Annual gross payroll of Turkish QSC staff × the year’s rate (2026: 9.4%) → the wage leg of the SBIE.

Measure tangible assets: Net book value of Turkish tangible assets × the year’s rate (2026: 7.4%) → the asset leg of the SBIE.

Find the excess: QSC income − total SBIE = the base subject to top-up. The smaller this base, the more your exemption survives.

One caution: the route out of the top-up is not the transitional safe harbours (CbCR/UTPR). Under the OECD’s “side-by-side” approach, safe harbours leave the QDMTT unaffected. The shield is not a paper harbour; it is real substance in the field.

The Decision Matrix: Substance QSC vs. Shell QSC

The investor decision reduces, before any location choice, to the level of substance. The same income produces a completely different net benefit depending on substance.

Table 2 — Substance level × net corporate-tax benefit

Substance level	SBIE protection	QDMTT top-up	Net incentive outcome
Full (high payroll + tangible assets)	Most income excluded	Small/zero	Incentive largely preserved
Partial (some staff, few assets)	Partial exclusion	~15% on excess	Incentive partly erodes
None (“shell”, invoicing center)	~0	~15% of the exempt amount	Incentive fully clawed back

The message: for an in-scope group, the real value of the QSC/IFC incentive is not the headline rate (100%/95%) but the SBIE-protected layer. The question is not “should I move to the IFC?” but “am I moving real operations to the IFC, or paper?”

Gökay GÜL’s note: The mistake I see most often is structures built on the assumption “we’re a finance/tech company, we claim the exemption, tax goes to zero.” For groups below EUR 750 million that is largely true — the incentive works fully. But in an in-scope group, before building the exemption ask one question: do you have the real payroll and tangible assets in Turkey to carry this income? If the answer is “no,” you pay the tax you didn’t pay as a QDMTT with the other hand — and that information is now exchanged automatically between countries under the multilateral agreement we signed. Substance first, exemption second. That is the order.

Field Case (Anonymized)

A Scandinavian-origin payments-technology group came to us in spring 2026. The aim was clear: consolidate four regional service teams under one roof, set up a qualified service center in the Istanbul Finance Center, and bill group-wide software and operations from there. The draft on the table rested on the sentence “the IFC has a 100% exemption, corporate tax is zeroed out.” The group’s global consolidated revenue was well above EUR 750 million — squarely in Pillar Two scope.

In the first meeting I asked one question: who will actually produce this service in Turkey — how many people, with what assets? The initial answer was “a core team, mostly remote, minimal assets.” That was the classic shell profile. Under that structure, roughly TRY 90 million of QSC income in year one would carry the 100% exemption, but because the effective rate fell to zero, the portion not protected by the SBIE would be recaptured at ~15% as a QDMTT in Turkey — most of the incentive returning to the treasury. The comfort of “we claimed the exemption” would become a top-up on the filing date.

We rebuilt the structure in two steps. First, we moved real operations, not invoicing: a meaningful part of the regional engineering and operations team became Turkish payroll, and hardware and office assets were placed on the QSC balance sheet — so both the payroll and the tangible-asset legs of the SBIE reached a meaningful size. Second, we tied the income-transfer and documentation flow, the Law 4875 QSC conditions (three countries, 80% foreign revenue) and the filing calendar into a single compliance plan. The result: most of the exemption was shielded under the SBIE, the top-up base shrank, and the group kept both the incentive and its reputation (avoiding a “shell” footprint in an age of automatic information exchange). The lesson was not in the numbers but in the order: substance door first, exemption second, the spreadsheet last.

Implementation Risks, Filing and Audit Certification

Don’t confuse the filing calendar. For FY2024, the local minimum top-up tax (QDMTT) return was extended, by circulars, finally to 28 January 2026. By contrast, the GloBE Information Return (GIR) is filed in the 18th month after period close — for FY2024, 30 June 2026. That is the date driving this article’s timing.

Transparency increased. The multilateral competent authority agreement (MCAA) on the exchange of global minimum tax information, approved by Presidential Decision 11396, was published in the Official Gazette on 6 June 2026 (no. 33272). Effective-tax and top-up data of groups above EUR 750m are now exchanged automatically among signatory countries — a “shell” cannot hide on paper.

Audit certification. Top-up computations run alongside the certification and reporting duties under General Communiqué No. 49 on the CPA/Sworn-CPA Law (Official Gazette 30.12.2025, no. 33123). Both the accuracy and the documentability of the computation are open to audit.

A margin of caution. Secondary implementing communiqués to Law 7582 are still being issued; confirm the final text for any specific transaction. Field commentary cites ~57 affected groups and ~TRY 40 billion of exposure; these are indicative, not official.

FAQ

1. Does the QDMTT really claw back the IFC 100% exemption? For groups above EUR 750m, yes — roughly 15% of the amount not protected by the SBIE is collected at home by Turkey’s own QDMTT.

2. Is a group below EUR 750m in scope of Pillar Two? No. Below the threshold the QSC/IFC exemption is fully effective; the QDMTT does not arise.

3. How much does the SBIE protect? A set percentage of real Turkish payroll and tangible assets (2026: 9.4% + 7.4%; steady-state 5% + 5%) is excluded from the top-up base. The higher the substance, the more of the incentive is preserved.

4. Is the personnel income-tax exemption affected by the QDMTT? No. It sits on the income-tax side; it does not lower the corporate-tax-based effective rate, so it triggers no top-up.

5. Is the QSC the same as the CITC Art. 10/1-(ğ) service-export deduction? No. Subparagraph (ğ) is an older, narrower regime (software, call-center, data storage, etc.); the QSC is a new regional-center regime under Law 4875 (Art. 10/1-(j)). The basis, rate and conditions differ.

Action List and Sources

Today: Determine whether the group is at the EUR 750m threshold — it decides which regime you are in.
Before structuring: Run the SBIE model (payroll + tangible assets) alongside the IFC/QSC exemption; the decision variable is the “SBIE-protected net benefit,” not the headline 100%.
Prioritize substance: Plan real headcount and tangible assets in Turkey; build an operations center, not an invoicing center.
Lock the calendar: FY2024 GIR information return is due 30.06.2026; align processes to it and to the 28.01.2026 domestic return.
Prepare for transparency: Information is exchanged under the MCAA; build the structure’s country-by-country consistency and documentability from the outset.

Sources: CITC 5520 (Part Five; Art. 10/1-(j) via 7582/7 and Art. 10/1-(ğ)); Law No. 7524 (minimum rate 15%; OG 02.08.2024); Law No. 7582 (OG 04.06.2026, no. 33270); Istanbul Finance Center Law No. 7412 (Art. 6, Provisional Art. 1); Law No. 4875 on Foreign Direct Investments (QSC definition); Local and Global Minimum Top-up Corporate Tax General Communiqué (OG 26.12.2025, no. 33119); Presidential Decision 11396 (MCAA; OG 06.06.2026, no. 33272); General Communiqué No. 49 on the CPA/Sworn-CPA Law (OG 30.12.2025, no. 33123); OECD GloBE Model Rules and Administrative Guidance (SBIE Art. 9.2; transitional safe harbours).

Gökay GÜL Certified Public Accountant (SMMM) | Director-Partner, Sistem Global Danışmanlık Field experience in foreign-investor, regional-headquarters (RHQ) and IFC/QSC structuring; builds taxpayers a roadmap from regime selection to contract. For IFC/QSC and Pillar Two structuring, book via gokaygul.com / info@gokaygul.com. Response within 48 hours.