Payment in Kind (PIK) is a form of debt interest capitalisation in which the borrower does not pay interest in cash but instead allows the interest to accrue to the principal balance — effectively compounding the debt over time. It is primarily used in mezzanine and unitranche financing structures to preserve cash flow for debt service on senior tranches and operational investments during the early years of an LBO.

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A PIK toggle structure allows the borrower to choose at each interest payment date whether to pay in cash or in kind — providing maximum flexibility. A full PIK instrument accumulates interest throughout the holding period and is repaid in full at maturity or exit. The PIK rate is typically 1.5 to 3.0% above the cash rate of the same instrument, compensating the lender for the compounding credit risk and the loss of cash income.

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From a tax perspective, PIK interest is generally deductible when accrued in France (CGI art. 39), subject to thin capitalisation limits. In Switzerland, PIK interest deductibility is subject to AFC thin capitalisation rules and must be documented at arm's length rates to avoid recharacterisation as hidden profit distribution.

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Example: a mezzanine lender provides CHF 3.0 million at 10% all-in (7% cash + 3% PIK) in a CHF 18.0 million LBO. Over a 5-year holding period, the PIK interest accumulates: Year 1: CHF 90,000 PIK → principal CHF 3.09M; Year 5: total accumulated principal approximately CHF 3.48M. The acquirer saves CHF 450,000 in cumulative cash interest over 5 years, directing this cash flow to senior debt repayment.

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At Hectelion, we model PIK instruments in our LBO financing structures, integrating tax and cash flow implications for Franco-Swiss transactions.