K daňové uznatelnosti nákladů z úvěrů: Analýza pomocí opčního modelu

Investigating a thin-capitalization rule: An option-based analysis

Jan Vlachý

Politická ekonomie, 2008, vol. 2008, issue 5, 656-668

Abstract: The Czech tax system is undergoing radical transformation. Among the many forthcoming changes, several features can be identified, which alter the structure of tax asymmetries. This paper uses an option-based model of direct taxation to examine a controversial new thin-capitalization rule, stipulating a mandatory benchmark for deductible unrelated-party loan expenses. We estimate the costs of debt under various risk-related scenarios, focusing on particular situations where the new regulation may result in distortions of business incentives and investment behaviour. We find that the measure can disproportionally increase the marginal cost of debt for companies with relatively risky business profiles. In particular, if the law were followed strictly, it could create effective barriers to further growth under perfectly realistic combinations of leverage and business risk. Another asymmetry arises due to a small-business exemption which can make new investment prohibitive when its cap is being reached. The model also suggests that non-deductibility of interest increases credit risk and could, in the longer term, contribute to a slack in SME lending.

Keywords: real options; thin capitalization; tax asymmetry; Merton model of debt (search for similar items in EconPapers)
JEL-codes: G13 G32 H25 H32 (search for similar items in EconPapers)
Date: 2008
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DOI: 10.18267/j.polek.657

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