Interest Deductibility After 2026: Why Financing Strategy Now Matters More

Debt is not simply a financing tool. It is a tax variable.

Beginning in 2026, business interest expense limitations tightened. For many operating businesses and pass-through entities, deductible interest is now limited to a percentage of adjusted taxable income. That adjustment changes the economics of leverage in a meaningful way.

For affluent business owners, this is not a technical footnote. It is structural.

Borrowing decisions now affect taxable income more directly. If interest is limited in the current year, excess amounts may carry forward. But a carryforward does not eliminate timing risk. It simply shifts it. When income fluctuates, the value of that deduction fluctuates with it.

Capital-intensive businesses face greater exposure. Real estate development, manufacturing, and acquisition-driven enterprises must coordinate financing terms with projected income patterns. A strong growth year may absorb interest fully. A compressed margin year may not.

Layering debt across entities introduces additional complexity. Operating companies, holding companies, and partnership structures can create mismatches between where income is reported and where interest expense resides. That mismatch can reduce the practical benefit of leverage even if the economics of the business remain sound.

The planning question is not whether debt is good or bad.

The question is whether financing structure aligns with projected income, ownership distribution, liquidity needs, and long-term capital strategy.

When leverage is meaningful, interest deductibility becomes part of wealth architecture. Financing decisions should not be made in isolation from tax structure, estate planning, or liquidity governance.

In 2026 and beyond, capital discipline requires coordination.

Written by Christi Shell, CWS®, AAMS®, BFA™, CETF®, Managing Director and Private Wealth Strategist at Shell Capital Management, LLC.

To speak with Christi about your financial situation, request a private consultation.

Shell Capital Management, LLC is a registered investment adviser. This material is for informational and educational purposes only and does not constitute investment, legal, or tax advice. Advisory services are only offered to clients or prospective clients where Shell Capital Management, LLC is properly registered or exempt from registration. Any views are as of the date published and may change. Investing involves risk, including the possible loss of principal. Past performance is not indicative of future results.