Consistent investment in research and development is at the heart of many family business breakthroughs. Like any investment, R&D spending consumes family capital today in the expectation of generating more cash flow in the future, and for many years, companies deducted R&D costs from taxable income as those dollars were spent. However, a little-heralded provision of the Tax Cut & Jobs Act of 2017 upended the status quo for tax treatment of R&D expenditures. Taxpayers are now required to capitalize R&D costs, deducting them from taxable income over a period of five years rather than in the period the costs were incurred. With this in mind, we present a brief case study to help family businesses visualize this change and better prepare for capital budgeting decisions in the future.