Michael Buckley
Chief Financial Officer at Robert Half
Thank you, Keith. Hello, everyone. As Keith noted, global revenues were $1.476 billion in the first quarter. On an as adjusted basis, first quarter talent solutions revenues were down 17% year-over-year, U.S. talent solutions revenues were $764 million, down 19% from the prior year's first quarter. Non-U.S. talent solutions revenues were $248 million, down 10% year-over-year. We have 315 talent solutions locations worldwide, including 91 locations in 17 countries outside of the United States.
In the first quarter, there were 62.8 billing days compared to 63.3 billing days in the same quarter one year ago. The second quarter of 2024 has 63.5 billing days compared to 63.3 billing days during the second quarter of 2023. Currency exchange rate fluctuations during the first quarter had the effect of increasing reported year-over-year total revenues by $2 million, $2 million for talent solutions and a negligible amount for Protiviti. Contract talent solutions bill rates for the first quarter increased 3.1% compared to one year ago. Adjusted for changes in the mix of revenues by functional specialization country and currency. This rate for the fourth quarter was 3.7%.
Now let's take a closer look at the results for Protiviti. Global revenues in the first quarter were $464 million, $378 million of that is from the United States and $86 million is from outside of the United States. On an as adjusted basis, global first quarter Protiviti revenues were down 5% versus the year-ago period. U.S. Protiviti revenues were down 4%, while non-U.S. Protiviti revenues were down 10%. Protiviti and its independently-owned member firms serve clients through a network of 89 locations in 29 countries.
Turning now to gross margin. In contract talent solutions first quarter gross margin was 39.5% of applicable revenues versus 39.8% in the first quarter one year ago. Conversion revenues or contract to hire were 3.2% of revenues in the quarter compared to 3.7% of revenues in the quarter one year ago. Our permanent placement revenues in the first quarter were 12.3% of consolidated talent solutions revenues versus 12.8% in the same quarter one year ago. When combined with contract talent solutions gross margin, overall gross margin for talent solutions was 47% compared to 47.5% of applicable revenues in the first quarter last year.
For Protiviti, gross margin was 18.9% of Protiviti revenues compared to 22.2% of Protiviti revenues one year ago. Adjusted for the amount of deferred compensation that is completely offset by investment income related to employee deferred compensation trusts or the deferred compensation investment income offset, gross margin for Protiviti was 20.7% for the quarter just ended compared to 23.2% last year.
Moving on to SG&A. Enterprise SG&A costs were 35.3% of global revenues in the first quarter compared to 32.2% in the same quarter one year ago. Adjusted for the deferred compensation investment income offset, enterprise SG&A costs were 33% for the quarter just ended compared to 30.9% last year. Talent solutions SG&A costs were 44.3% of talent solutions revenues in the first quarter versus 39% in the first quarter of 2023. Adjusted for the deferred compensation investment income offset, talent solutions SG&A costs were 40.8% for the quarter just ended compared to 37.1% last year. First quarter SG&A cost for Protiviti were 15.8% of Protiviti revenues compared to 15.3% of revenues for the same quarter last year.
Operating income for the quarter was $41 million. Adjusted for the deferred compensation investment income offset combined segment income was $85 million in the first quarter. Combined segment margin was 5.7%. First quarter segment income from our talent solutions divisions was $62 million, with a segment margin of 6.1%. Segment income for Protiviti in the first quarter was $23 million, with a segment margin of 4.9%.
Our first quarter 2024 income statement includes $43 million as income from investments held in employee deferred compensation trust. This is completely offset by an equal amount of additional employee compensation, which is reflected in SG&A expenses and direct costs. As such, it has no effect on the reported -- on our reported net income. Our first quarter tax rate was 30% compared to 28% one year ago. At the end of the first quarter, accounts receivable were $861 million and implied days sales outstanding or DSO was 52.5 days.
Before we move to second quarter guidance, let's review some of the monthly revenue trends we saw in the first quarter and so far in April, all adjusted for currency and billing days. Contract talent solutions exited the first quarter with March revenues down 16% versus the prior year compared to a 16% decrease for the full quarter. Revenue for the first two weeks of April were down 16% compared to the same period last year. Permanent placement revenues in March were down 17% versus March 2023. This compares to a 20% decrease for the full quarter.
For the first three weeks of April, permanent placement revenues were down 18% compared to the same period in 2023. We provide this information so you have insight into some of the trends we saw during the first quarter and into April. But as you know, these are very brief time periods, we caution against reading too much into them.
With that in mind, we offer the following second quarter guidance. Revenues $1.45 billion to $1.55 billion, Income per share $0.63 to $0.77, midpoint revenue of $1.5 billion or 9% lower than the same period in 2023 on an as adjusted basis. The major financial assumptions underlying the midpoint of these estimates are as follows. Revenue growth on a year-over-year basis as adjusted, talent solutions down 10% to 14%, for Protiviti down 3% to flat, overall down 7% to 11%.
Gross margin for contract talent 38% to 41%. For Protiviti on an as adjusted for the deferred compensation investment income offset 22% to 24%, overall 38% to 40%. SG&A as a percentage of revenues adjusted for the deferred compensation investment income offset, talent solutions 40% to 42%, Protiviti 15% to 17% and overall 32% to 34%. Segment income for talent solutions 5% to 7%, Protiviti 6% to 8%, overall 5% to 8%. Our tax rate 29% to 30% and shares outstanding 103 million to 104 million.
2024 capital expenditures and capitalized cloud computing costs $90 million to $110 million, with $20 million to $25 million in the second quarter. As always, we limit our formal guidance to one quarter forward. Just for informational purposes, we would note that the 10 year average performance for the third quarter, excluding 2020's COVID impact is for sequential revenue gains of 1.1% and sequential EPS gains of 4.3%. All estimates we provide on this call are subject to the risks mentioned in today's press release and in our SEC filings.
Now. I'll turn the call back over to Keith.