The "Small Business Growth Act" aims to significantly amend Section 179 of the Internal Revenue Code of 1986, primarily by increasing the limitations on expensing depreciable business assets. A key provision is the proposal to double the maximum amount a business can expense under this section, raising it from $1,000,000 to $2,000,000. Additionally, the bill seeks to increase the phase-out threshold for these expensing limits from $2,500,000 to $3,500,000, allowing more businesses to benefit from the full deduction. It also updates the base years for inflation adjustments to 2026 for the new expensing limits and 2025 for the general inflation adjustment. These amendments are scheduled to take effect for property placed in service in taxable years beginning after December 31, 2025.