What it means
The mechanism itself is straightforward. A parent company in a low-tax jurisdiction lends money to its own subsidiary in a high-tax country, the subsidiary pays interest, and that interest is a deductible expense against local profit.
Nothing has moved except an internal payment, yet the local tax bill falls sharply. The same effect can be produced without any formal loan, through royalties, management charges or intra-group service fees.
The common thread is a deductible payment to a related party that reduces profit in the high-tax country. Tax authorities treat these as variations on the same problem, usually described as base erosion.
The consequences reach beyond the tax department. A local subsidiary can look barely profitable while the operating business is performing well, which distorts everything from local bonus schemes and bank covenants to the price offered to a minority shareholder.
Local management can find itself defending numbers that reflect group tax planning rather than its own performance. The main defence is an interest limitation rule.
Many countries now cap net interest deductions at around 30% of a defined measure of earnings before interest, tax, depreciation and amortisation, with disallowed amounts carried forward to later years. Thin capitalisation rules, which limit a local subsidiary's debt to equity ratio, and withholding taxes on outbound interest operate alongside the cap.
The important nuance is that intra-group lending is not automatically abusive. Groups fund their subsidiaries internally for ordinary commercial reasons, and the real test is whether the amount borrowed and the rate charged are what an unrelated lender would have agreed.
That arm's length standard, combined with the interest cap, is where arguments with a tax authority actually take place.
In practice
Real-world examples.
Example
A consumer goods group based in a jurisdiction with a 9% corporate rate lends $200,000,000 to its manufacturing subsidiary in a 25% rate country at an interest rate of 9%, when comparable third-party debt would cost 5%. The tax authority challenges the rate rather than the loan itself, and disallows the excess above an arm's length charge.
Example
A software group holds its intellectual property in a low-tax entity and charges its trading subsidiaries a royalty of 12% of revenue. Local profit falls close to break-even in several countries, and two of them open transfer pricing enquiries into whether the royalty rate reflects the value actually created locally.
Example
A private equity owner funds an acquisition with a mixture of external bank debt and a large shareholder loan from an offshore fund vehicle. The interest limitation rule disallows part of the shareholder loan interest, which the acquired company carries forward and cannot use until profits grow.
Formula
Calculation
Deductible interest = the lesser of actual net interest expense and (limitation percentage x adjusted taxable income). Disallowed interest = actual net interest expense - deductible interest.
A local subsidiary has adjusted taxable income of $40,000,000 before interest and pays $18,000,000 of interest to its foreign parent. The interest cap is 30% x $40,000,000 = $12,000,000, so $18,000,000 - $12,000,000 = $6,000,000 of interest is disallowed. Taxable income becomes $40,000,000 - $12,000,000 = $28,000,000, and at a 21% corporate rate the tax due is $5,880,000. Without the cap, taxable income would have been $22,000,000 and the tax $4,620,000, so the rule costs the group $1,260,000. Even so, a company with no intra-group debt at all would have paid $40,000,000 x 0.21 = $8,400,000, so the structure still saves $2,520,000 a year.Case study
Seen in the real world.
The following is a fictional illustration. Ardent Nutrition Group is an invented multinational whose operating subsidiary in a 25% tax country reported operating profit of $30,000,000 but a pre-tax profit of only $4,000,000 after paying $26,000,000 of interest on an intra-group loan.
When the country introduced an interest cap of 30% of adjusted taxable income, only $9,000,000 of that interest remained deductible, leaving $17,000,000 disallowed and lifting the local tax bill by $17,000,000 x 0.25 = $4,250,000 a year. The group also faced an awkward second problem: the local managing director's bonus was tied to subsidiary pre-tax profit, which the financing structure had suppressed for six years.
In this illustrative case the group restructured, converting part of the loan to equity and rebasing local incentives on operating profit instead. The episode is a reminder that aggressive intra-group financing has internal costs as well as external ones.
Watch out
Common mistakes.
- Assuming any intra-group loan is aggressive tax planning, when internal funding at arm's length terms is entirely normal.
- Judging a subsidiary's commercial performance on its pre-tax profit without checking how much of the gap is intra-group interest.
- Believing disallowed interest is lost permanently, when many regimes allow it to be carried forward and used in later years.
Questions
People also ask.
Is earnings stripping illegal?
Not in itself, since it uses ordinary deductions, but it is heavily restricted by interest limitation, thin capitalisation and transfer pricing rules, and structures that ignore those rules attract penalties.
What is the usual interest deduction cap?
Many countries follow an approach of limiting net interest to about 30% of a defined earnings measure, though the definitions and thresholds vary widely by jurisdiction.
How is earnings stripping different from transfer pricing?
Earnings stripping is specifically about deductible financing payments, while transfer pricing covers the pricing of all transactions between related parties, including goods, services and intellectual property.
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