The most immediate consequence is straightforward: capital is no longer cheap. As financing costs rise, investment decisions become more constrained, and projects that once seemed viable under low discount rates are now being reassessed. This shift is forcing companies to refocus on fundamentals. Growth alone is no longer sufficient — profitability and cash flow generation are back at the center of financial decision-making.

This change is particularly visible in M&A activity. Higher interest rates directly affect valuations by increasing discount rates, which mechanically reduces the present value of future cash flows. At the same time, financing conditions have tightened. Banks are more cautious, underwriting standards are stricter, and leverage levels are lower than they were just a few years ago.

As a result, deal structures are evolving. Leveraged buyouts, for instance, are no longer built on aggressive debt assumptions. Equity contributions are increasing, and transactions rely more heavily on operational performance than on financial engineering alone. In many ways, this reflects a return to principles long discussed in corporate finance theory, notably by Stewart Myers, where capital structure choices are shaped by both market conditions and firm-specific constraints.

Beyond pricing, access to credit itself is becoming more selective. Banks are not only lending at higher rates; they are also lending less freely. This dynamic echoes the credit rationing mechanisms described by Joseph Stiglitz, where information asymmetries lead lenders to restrict credit rather than simply adjust pricing. In a higher-rate environment, uncertainty is amplified, and this tends to disproportionately affect smaller or less transparent firms.

For many SMEs, especially those without financial sponsors, this creates a real constraint. Transactions that would have been feasible a few years ago are now harder to structure, not necessarily because of weaker fundamentals, but because financing is more difficult to secure.

At the same time, the broader financial ecosystem is adapting. Private debt funds and other non-bank lenders are stepping in to fill part of the gap left by traditional banks. However, this alternative financing often comes at a higher cost and with more complex structuring requirements.

In this context, financial engineering is regaining importance — not as a way to maximize leverage, but as a tool to make transactions feasible. Mechanisms such as earn-outs, vendor loans, or hybrid instruments are increasingly used to bridge valuation gaps and mitigate risk between buyers and sellers.

More fundamentally, the shift in interest rates is reintroducing a form of discipline that had, to some extent, faded during the years of abundant liquidity. Capital allocation is becoming more selective, leverage is used more cautiously, and the margin for error is shrinking.

This does not mean that deal-making or investment activity will stop. Rather, it suggests that the rules of the game have changed. Financial performance must now stand on its own, without relying on exceptionally favorable financing conditions.

In that sense, the current environment may be less forgiving, but it is also more grounded. It brings corporate finance back to a balance between financial structuring and economic reality — where value creation depends not only on how deals are financed, but on the underlying strength of the businesses themselves.

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