Jamere Jackson
Chief Financial Officer at AutoZone
Thanks, Phil, and good morning, everyone. Before I unpack our results, I want to remind you that each year, our fiscal year ends on the last Saturday in August. Based on the way the calendar fell this year, we had an extra week in our fiscal year and the fourth quarter is based on 17 weeks versus 16. For comparison, our same-store sales comps are based on a 16-week basis, while our total sales, EBIT and EPS results will be discussed on a 17-week basis.
As Phil has previously discussed, we reported 9% total company sales growth. On a 16-week basis, total company sales were up 2.6%. Our domestic same-store sales grew 0.2% and our international comp was up 9.9% on a constant-currency basis. Total company EBIT grew 6.1% and our EPS grew 11%.
I also want to point out that we had a headwind from foreign exchange rates in this quarter. We had a 500 basis points drag on international sales that resulted in a $32 million headwind to sales, an $8 million headwind to EBIT and a $0.32 a share drag on EPS versus the prior year. We continue to deliver solid results despite the economic backdrop and the efforts of our AutoZoners in our stores and distribution centers have enabled us to grow our business and our earnings in a meaningful way.
Let me take a few moments to elaborate on the specifics in our P&L for Q4. For the quarter, total sales were just over $6.2 billion and as I just mentioned, was up 9%. For the year, our total sales were $18.5 billion, up 5.9% versus last fiscal year. And let me give a little color on our sales and our growth initiatives. Starting with our domestic commercial business for the fourth quarter, our domestic DIFM sales increased 10.9% to $1.7 billion. On a 16-week basis, our domestic commercial business grew 4.5%. For FY '24, our commercial sales were $4.9 billion, up 6.2% versus last year.
In the quarter, sales to our domestic DIFM customers represented 31% of our domestic auto parts sales and 27% of our total company sales. Our average weekly sales per program were $16,700, flat to last year as we lap new programs that we opened that are not at maturity. Our commercial acceleration initiatives are continuing to deliver good results as we grow share by winning new business and increasing our share of wallet with existing customers. We now have our commercial program and approximately 92% of our domestic stores, which leverages our DIY infrastructure and we're building our business with national, regional and local accounts. This quarter, we opened 55 net new programs, finishing with 5,898 total programs.
Importantly, we have a lot of runway in front of us and we will aggressively pursue growth in commercial, which represents a tremendous growth opportunity for our company. To support our commercial growth, we now have 109 mega hub locations. While I mentioned a moment ago, our commercial weekly sales per program average was $16,700 per program. The 109 mega hubs averaged significantly higher sales and are growing much faster than the balance of the commercial business in Q4.
As a reminder, our mega hubs typically carry over 100,000 SKUs and drive tremendous lift inside the store box as well as serve as an expanded fulfillment source for other stores. The expansion of coverage and parts availability continues to deliver a meaningful sales lift to both our commercial and DIY business. These assets are performing well individually and the fulfillment capability for the surrounding AutoZone stores is giving our customers access to thousands of additional parts and lifting the entire network.
We have an objective to have well north of 200 mega hubs at full build-out. Our customers are excited by our commercial offering as we deploy more parts in the local markets closer to the customer while improving our service levels. On the domestic retail side of our business, our DIY comp was down 1.1% for the quarter. For all of FY '24, our DIY comp was down 60% [Phonetic]. Despite the industry softness, we continue to gain share in DIY and we are well positioned when the industry reaccelerates. As Phil mentioned, we saw traffic down 2% along with 1% ticket growth. As we move forward, we would expect to see slightly declining transaction counts, offset by low to mid-single digit ticket growth, in line with the long-term historical trends for the business, driven by changes in technology and the durability of new parts.
Our DIY business has continued to gain share behind our growth initiatives. Importantly, the market is experiencing a growing and aging car park and a challenging new and used car sales market for our customers, which continues to provide a tailwind for our business. These dynamics, ticket growth, growth initiatives and macro car park tailwinds, we believe, will continue to drive a resilient DIY business environment for FY '25.
Now, I'll say a few words regarding our international business. We continue to be pleased with the progress we're making in our international markets. During the quarter, we opened 31 new stores in Mexico to finish with 794 stores and 18 new stores in Brazil, ending with 127. Our same-store sales grew 9.9% on a constant currency basis and 4.9% when taken into account foreign exchange rates. We remain committed to international and given our success in these markets, we will accelerate the store opening pace going forward. We're bullish on international being an attractive and meaningful contributor to AutoZone's future sales and operating profit growth.
Now let me spend a few minutes on the rest of the P&L and gross margins. For the quarter, our gross margin was 52.5%, down 21 basis points, driven primarily by an unfavorable LIFO comparison to last year. Excluding LIFO from both years, we had a 32 basis point improvement in gross margin driven by continued improvement in merchandising margins. For Q4 last year, we had a $30 million LIFO credit while this year, we did not have any credits. We previously said that we thought we would have approximately $10 million of LIFO credits in the quarter, which would have equated to 16 bps of higher gross margins or $0.45 a share.
At year end, we had $19 million in cumulative LIFO charges yet to be reversed through our P&L. At the moment, we are not anticipating any charges or credits to our P&L for Q1 of FY '25 as inflation has not materially impacted our LIFO inventory accounting results. I will remind you that in last year's first quarter, we booked $2 million LIFO credit. And as a reminder, once we credit back the $19 million through the P&L, we will not take any more credits and we will begin to rebuild an unrecorded LIFO reserve.
Moving to operating expenses. Our expenses were up 10.4% versus last year's Q4 as SG&A as a percentage of sales deleveraged 37 basis points. On a 16-week basis, our SG&A was up 4.6%. The growth in SG&A has been purposeful as we continue to invest at an accelerated pace in IT and payroll to underpin our growth initiatives. These investments will pay dividends and customer experience, speed and productivity. We're committed to being disciplined on SG&A growth as we move forward and we will manage expenses in line with sales growth over time.
Moving to the rest of the P&L, EBIT for the quarter was $1.3 billion, up 6.1% versus the prior year. EBIT for FY '24 was just under $3.8 billion, up 9.1% versus the prior year driven by top line growth and gross margin improvement. Interest expense for the quarter was $153.2 million, up 41% from Q4 a year ago, as our debt outstanding at the end of the quarter was $9 billion versus $7.7 billion at Q4 in last year. We're planning interest in the $108 million range for the first quarter of FY '25 versus $91.4 million in this year -- in this past year's first quarter. Higher debt levels and borrowing rates across the curve are driving this increase.
For the quarter, our tax rate was 21.1% and down from last year's fourth quarter of 22.4%. This quarter's rate benefited 80 basis points from stock options exercised, while last year, it benefited 22 basis points. For the first quarter of FY '25, we suggest investors model us at approximately 23.4% before any assumption on credits due to stock option exercises.
Moving to net income and EPS. Net income for the quarter was $902 million, up 4.3% versus last year. Our diluted share count of $17.5 million was 6% lower than last year's fourth quarter. The combination of higher net income and lower share count drove earnings per share for the quarter to $51.58 up 11% for the quarter. For FY '24, net income was $2.7 million, up 5.3% and earnings per share was $149.55, up 13%.
Now let me talk about our free cash flow. For the fourth quarter, we generated $723 million in free cash flow and for the year, we generated $1.9 billion in free cash. We expect to continue being in an incredibly strong cash flow generator going forward, and we remain committed to returning meaningful amounts of cash to our shareholders.
Regarding our balance sheet, our liquidity position remains very strong and our leverage ratio finished at 2.5 times EBITDAR, even our inventory per store was up 3.7% versus Q4 last year, while total inventory increased 6.8% over the same period last year, driven by new store growth. Net inventory, defined as merchandise inventories less accounts payable on a per store basis was a negative $163,000 versus negative $201,000 last year and negative $168,000 last quarter. As a result, accounts payable as a percent of gross inventory finished the quarter at 119.5% versus last year's Q4 of 124.9%.
Lastly, I'll spend a moment on capital allocation and our share repurchase program. We repurchased $711 million of AutoZone stock in the quarter. And at quarter end, we had just under $2.2 billion remaining under our share buyback authorization. The strong earnings balance sheet and powerful free cash we generated this year has allowed us to buy back 6% of the shares outstanding since the beginning of the fiscal year. We have bought back over 100% of the [Indecipherable] outstanding shares of stock since our buyback inception in 1998, while investing in our existing assets and growing our business. We remain committed to this disciplined capital allocation approach that will enable us to invest in the business and return meaningful amounts of cash to shareholders.
To wrap up, we remain committed to driving long-term shareholder value by investing in our growth initiatives, driving robust earnings and cash and returning excess cash to our shareholders. Our strategy continues to work. We've grown our market share domestically and internationally and improving our competitive positioning in a disciplined way. As we look forward to FY '25, we're bullish on our growth prospects behind a resilient DIY business, a fast-growing international business and a domestic commercial business that is continuing to grow share.
I continue to have tremendous confidence in our ability to drive significant and ongoing value for our shareholders behind a strong industry, a winning strategy and an exceptional team of AutoZoners. Before handing the call back to Phil, I want to remind you that we report revenue comps on a constant currency basis to reflect our operating performance. We generally don't take on transactional risk, so our results reflect the translation impact for reporting purposes. As I mentioned earlier, in the quarter, foreign currency resulted in a headwind on revenue and EPS.
If yesterday's spot rates held constant for Q1 FY '25, then we expect an approximate $55 million drag on revenue, a $16 million drag on EBIT and a $0.63 a share drag on EPS. And if rates remained at the current spot rates for the full fiscal year 2025, we would expect an approximate $265 million impact of revenues, a $90 million impact to EBIT and a $3.64 a share impact to full year EPS.
And now, I'll turn it back to Phil.