Michael Buckley
Executive Vice President & Chief Financial Officer at Robert Half
Thank you, Keith, and hello, everyone. As Keith noted, global revenues were $1.716 billion in the first quarter. On an as adjusted basis, first quarter talent solutions revenues were down 9% year-over-year. U.S. talent solutions revenues were $944 million, down 11% from the prior year. Non-U.S. talent solutions revenues were $278 million, down 3% year-over-year on an as adjusted basis. We have 317 talent solutions locations worldwide, including 86 locations in 18 countries outside of the United States.
In the first quarter, there were 63.3 billing days, compared to 62.4 billing days in the same quarter one year ago. The second quarter of 2023 has 63.3 billing days, compared to 63.4 billing days during the second quarter of 2022. Currency exchange rate movements during the first quarter had the effect of decreasing reported year-over-year total revenues by $21 million; $15 million for talent solutions and $6 million for Protiviti. This negatively impacted our year-over-year overall revenue growth rate by 1.2 percentage points; 1.1 percentage points for talent solutions and 1.3 percentage points for Protiviti. Contract talent solutions bill rates for the quarter increased 6.9% compared to one year ago, adjusted for changes in the mix of revenues by functional specialization, currency and country. The rate for the fourth quarter was 7.8%.
Now let's take a closer look at the results for Protiviti. Global revenues in the first quarter were $494 million; $397 million of that is from business within the United States, and $97 million is from operations outside the United States. On an as adjusted basis, global first quarter Protiviti revenues were up 4% versus the year-ago period, with U.S. Protiviti revenues up 6%, while non-U.S. Protiviti revenues were down 1%. 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 39.8% of applicable revenues, compared to 40% of applicable revenues in the first quarter one year ago. Conversion revenues or contract-to-hire were 3.7% of revenues in the quarter compared to 4% of revenues in the quarter one year ago. Our permanent placement revenues in the quarter were 12.8% of consolidated talent solutions revenues, versus 13.9% in the same quarter one year ago. When combined with contract talent solutions gross margin, overall gross margin for talent solutions was 47.5%, compared to 48.3% of applicable revenues in the first quarter one year ago. For Protiviti, gross margin was 22.2% of Protiviti revenues, compared to 26.2% of Protiviti revenues one year ago. Adjusted for deferred compensation related classification impacts, gross margin for Protiviti was 23.2% for the quarter just ended, compared to 25.3% one year ago.
Enterprise selling, general and administrative costs or SG&A were 32.2% of global revenues in the first quarter, compared to 28.3% in the quarter -- in the same quarter one year ago. Adjusted for deferred compensation related classification impacts, enterprise SG&A costs were 30.9% for the quarter just ended, compared to 29.8% one year ago. Talent solutions SG&A costs were 39% of talent solutions revenues in the first quarter, versus 33.6% in the first quarter of 2022. Adjusted for deferred compensation related classification impacts, talent solutions SG&A costs were 37.1% for the quarter just ended, compared to 35.6% one year ago. The lower mix of permanent placement revenues this quarter versus one year ago had the effect of decreasing the quarter's adjusted SG&A ratio by 0.6 percentage points. The increase in talent solutions SG&A as a percent of revenues in the current period was driven primarily by internal staff compensation costs. First quarter SG&A costs for Protiviti were 15.3% of Protiviti revenues, compared to 13.3% of revenues in the year ago period as operating expenditures returned to more normal pre-pandemic levels.
Operating income for the quarter was $138 million. Adjusted for deferred compensation related classification impacts, combined segment income was $165 million in the first quarter. Combined segment margin was 9.6%. First quarter segment income from our talent solutions divisions was $126 million, with a segment margin of 10.3%. Segment income for Protiviti in the first quarter was $39 million, with a segment margin of 7.9%.
Our first quarter tax rate was 28%, up from 26% for the same quarter one year ago. The higher tax rate for 2023 can be primarily attributed to lower tax credits as well as lower stock compensation deductions due to the company's stock price. At the end of the first quarter, accounts receivable were $1.009 billion, and implied days sales outstanding or DSO was 52.9 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 9% versus the prior year, compared to a 8% decrease for the full quarter. Revenues for the first two weeks of April were down 11% compared to the same period one year ago.
Permanent placement revenues in March were down 17% versus March of 2022. This compares to a 16% decrease for the full quarter. For the first three weeks of April, permanent placement revenues were down 13% compared to the same period in 2022. We provide this information, so that 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, $1.655 billion to $1.735 billion; income per share, $1.09 to $1.19. Midpoint revenues of $1.695 billion are 9% lower than the same period in 2022 on an as adjusted basis.
The major financial assumptions underlying the midpoint of these estimates are as follows. Revenue growth, year-over-year, on an as adjusted, talent solutions, down 11% to down 16%; Protiviti, up 2% to up 5%; Overall, down 7% to down 11%. Gross margin percentage for contract talent, 39% to 41%; Protiviti, 24% to 26%; Overall, 40% to 42%.
SG&A as percent of revenues, excluding deferred compensation classification impacts, talent solutions, 37% to 39%; Protiviti, 14% to 16%; Overall, 30% to 32%. Segment income, talent solutions, 8% to 11%; Protiviti, 9% to 12%; Overall, 8% to 11%. For the tax rate, 28% to 29%; shares outstanding, 106 million to 107 million. 2023 capital expenditures and capitalized computing costs, $90 million to $100 million, with $20 million to $25 million in the second quarter.
We limit our guidance to one quarter. 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.