Selling, general and administrative expenses
Selling, general and administrative (SG&A) expenses increased $53.8 million or 8.8%, to $665.9 million for the 13 weeks ended May 4, 2024, compared to $612.1 million for the 13 weeks ended April 29, 2023. SG&A expenses as a percentage of net sales increased to 24.4% for the 13 weeks ended May 4, 2024, compared to 23.2% for the 13 weeks ended April 29, 2023, primarily due to higher corporate overhead for strategic investments, higher store payroll and benefits, and higher store expenses.
Pre-opening expenses
Pre-opening expenses were $2.9 million for the 13 weeks ended May 4, 2024 compared to $0.7 million for the 13 weeks ended April 29, 2023.
Interest income, net
Interest income, net was $6.9 million for the 13 weeks ended May 4, 2024 compared to $7.3 million for the 13 weeks ended April 29, 2023. We did not have any outstanding borrowings on the credit facility as of May 4, 2024, February 3, 2024, and April 29, 2023.
Income tax expense
Income tax expense of $94.7 million for the 13 weeks ended May 4, 2024 represents an effective tax rate of 23.2%, compared to $102.4 million of income tax expense representing an effective tax rate of 22.8% for the 13 weeks ended April 29, 2023. The higher income tax rate is primarily due to a reduced benefit from income tax accounting for stock-based compensation.
Net income
Net income was $313.1 million for the 13 weeks ended May 4, 2024, compared to $347.1 million for the 13 weeks ended April 29, 2023. The decrease in net income is primarily related to the $53.8 million increase in SG&A expenses and the $0.4 million decrease in interest income, net, partially offset by the $14.9 million increase in gross profit and the $7.6 million decrease in income tax expense.
Liquidity and capital resources
Our primary sources of liquidity are cash and cash equivalents, cash flows from operations, and borrowings under our credit facility. The most significant components of our working capital are merchandise inventories, cash and cash equivalents, and receivables, reduced by accounts payable, deferred revenue, and accrued liabilities. As of May 4, 2024, February 3, 2024, and April 29, 2023, we had cash and cash equivalents of $524.6 million, $766.6 million, and $636.4 million, respectively.
Our primary cash needs are for rent, capital expenditures for new, remodeled, and relocated stores, increased merchandise inventories related to store expansion and new brand additions, supply chain improvements, share repurchases, and continued investment in our information technology systems.
Our most significant ongoing short-term cash requirements relate primarily to funding operations (including expenditures for lease expenses, inventory, labor, distribution, advertising and marketing, and tax liabilities) as well as periodic spend for capital expenditures, investments, and share repurchases. Our working capital needs are greatest from August through November each year as a result of our inventory build-up during this period for the approaching holiday season.
Long-term cash requirements primarily relate to funding lease expenses and other purchase commitments.
We generally fund short-term and long-term cash requirements with cash from operating activities. We believe our primary sources of liquidity will satisfy our cash requirements over both the short term (the next twelve months) and long term.