Richard D. Fairbank
Chairman, Chief Executive Officer, and President at Capital One Financial
Thanks, Andrew, and good evening, everyone. Slide 10 shows second quarter results in our credit card business. Credit card segment results are largely a function of our domestic card results and trends, which are shown on slide 11. In the second quarter, our domestic card business delivered another quarter of strong results as we continued to invest in flagship products and exceptional customer experiences to grow our franchise. Year-over-year purchase volume growth for the quarter was 5%. Ending loan balances increased $11.1 billion or about 8% year-over-year. Average loans also increased about 8% and second quarter revenue was up 9%, driven by the growth in purchase volume and loans.
Revenue margin for the quarter remained strong at 17.9%. The revenue margin includes a positive impact of about 18 basis points resulting from the partial quarter effect of the end-of-the Walmart revenue-sharing agreement. The charge-off rate for the quarter was 6.05%. The partial quarter impact of the end-of-the Walmart loss-sharing agreement increased the quarterly charge-off rate by 19 basis points. Excluding this impact, the charge-off rate for the quarter would have been 5.86%, up 148 basis points year-over-year. The 30-plus delinquency rate at quarter-end was 4.14%, up 40 basis points from the prior year.
As a reminder, the end-of-the Walmart loss-sharing agreement did not have a meaningful impact on delinquency rates. The pace of year-over-year increases in both the charge-off rate and the delinquency rate have been steadily declining for several quarters and continued to shrink in the second quarter. On a sequential quarter basis, the charge-off rate excluding the Walmart impact was down 8 basis points and the 30-plus delinquency rate was down 34 basis points. Domestic card non-interest expense was up 5% compared to the second quarter of 2023, primarily driven by higher marketing expense.
Total company marketing expense in the quarter was $1.1 billion, up 20% year-over-year. Our choices in domestic card are the biggest driver of total company marketing. We continue to see compelling growth opportunities in our domestic card business. Our marketing continues to deliver strong new account growth across the domestic card business. Compared to the second quarter of 2023, domestic card marketing in the quarter included increased marketing to grow originations at the top of the marketplace, higher media spend and increased investment in differentiated customer experiences like our travel portal, airport lounges and Capital One Shopping.
Slide 12 shows second quarter results for our consumer banking business. After returning to positive growth last quarter, auto originations were up 18% year-over-year in the second-quarter. Consumer banking ending loans were down $1.6 billion or 2% year-over-year and average loans were down 3%. On a linked-quarter basis, ending loans were up 1% and average loans were flat. Compared to the year-ago quarter, ending consumer deposits were up about 7% and average deposits were up 5%. Consumer banking revenue for the quarter was down about 9% year-over-year, largely driven by higher deposit costs and lower average loans compared to the prior year quarter.
Non-interest expense was up about 2% compared to the second quarter of 2023, driven by an increase in marketing to support our national digital bank. The auto charge-off rate for the quarter was 1.81%, up 41 basis points year-over-year. The 30-plus delinquency rate was 5.67%, up 29 basis points year-over-year, largely as a result of our choice to tighten credit and pull back in 2022, auto charge-offs have been strong and stable.
Slide 13 shows second quarter results for our commercial banking business. Compared to the linked-quarter, ending loan balances decreased about 1%. Average loans were also down about 1%. The modest declines are largely the result of choices we made in 2023 to tighten credit. Ending deposits were down about 6% from the linked-quarter. Average deposits were down about 3%. The declines are largely driven by our continued choices to manage down selected less attractive commercial deposit balances.
Second quarter revenue was essentially flat from the linked-quarter and non-interest expense was lower by about 6%. The commercial banking annualized net charge-off rate for the second quarter increased 2 basis points from the sequential quarter to 0.15%. The commercial banking criticized performing loan rate was 8.62%, up 23 basis points compared to the linked-quarter. The criticized non-performing loan rate increased 18 basis points to 1.46%.
In closing, we continued to deliver strong results in the second quarter. We delivered another quarter of top line growth in domestic card loans, purchase volume and revenue and a second consecutive quarter of year-over-year growth in auto originations. Consumer credit trends continued to show stability and our operating efficiency ratio improved. We had guided to 2024 annual operating efficiency ratio, net of adjustments to be flat to modestly down compared to 2023, assuming the CFPB late fee rule takes effect in October and we're on a very consistent path with what we expected when we gave that guidance.
If the implementation of the rule is delayed, that would be a tailwind to 2024 annual operating efficiency ratio. One thing that has changed is the Walmart relationship. Our partnership ended in the second quarter, which will increase charge-off rates, but have a positive impact on operating efficiency ratio. Including the Walmart impact, we expect full year 2024 operating efficiency ratio net of adjustments to be modestly down compared to 2023. We continue to lean into marketing to grow and to further strengthen our franchise. In the domestic card business, we continue to get traction in originations across our products and channels and our origination opportunities are enhanced by our technology transformation, which enables us to leverage machine learning at-scale to identify the most attractive growth opportunities and customize our marketing offers.
We are also getting traction in building our franchise at the top of the market with heavy spenders. It is not lost on us that competitive intensity and marketing levels are increasing at the very top of the market and we know we have important investments to make. We continue to be pleased to see our investments pay off in customer and spend growth and returns. And we're building an enduring franchise with annuity-like revenue streams, very low losses and very low attrition.
In consumer banking, our modern technology and leading digital capabilities are powering our Digital First national banking strategy and we're leaning even harder into marketing to grow our national checking franchise, which has had an industry-leading pricing with no fees and industry-leading customer satisfaction. Pulling up, marketing is a key driver of current and future growth and value-creation across the company and we're leaning hard into our marketing investments. We expect total company marketing in the second half of 2024 to be meaningfully higher than the first half, similar to the pattern we saw last year.
We are all-in and working hard to complete the Discover acquisition. Our applications for regulatory approval are in process and we're fully mobilized to plan and deliver a successful integration. We continue to expect that we'll be in a position to complete the acquisition late this year or early next year, subject to regulatory and shareholder approval. The combination of Capital One and Discover creates game-changing strategic opportunities. The Discover Payments network positions Capital One as a more diversified, vertically-integrated global payments platform and adding Capital One's debit spending and a growing portion of our credit card purchase volume to the Discover network will add significant scale, increasing the network's value to merchants, small businesses and consumers and driving enhanced network growth.
In credit cards and consumer banking, we're bringing together proven franchises with complementary strategies and a shared focus on the customer. And we will be able to leverage and scale the benefits of our 11-year technology transformation across every business and the network. Pulling way up, the acquisition of Discover is a singular opportunity. It will create a consumer banking and global payments platform with unique capabilities, modern technology, powerful brands and a franchise of more than 100 million customers. It delivers compelling financial results and offers the potential to create significant value for merchants and customers.
And now, we'll be happy to answer your questions. Jeff?