Efrain Rivera
Senior Vice President and Chief Financial Officer at Paychex
Thanks, John. Good morning to everyone on the call. I'd like to remind you the customary things I remind you that during these conversations, we're going to talk about forward-looking statements, items like EBITDA, non-GAAP measures, please refer to our press release for more information on these topics. I'll start by providing some of the key points for the quarter and finish up with a review of our fiscal 2023 outlook.
Total revenue for the quarter, as you saw grew 8% to $1.4 billion. Total service revenue increased 7% to $1.3 billion. Obviously, we're benefiting from the increase in interest rates. Management Solutions revenue increased 7% to $1 billion, driven by additional product attachment, HR ancillary services. It's largely what we've discussed previously, our ERTC product and price realization. We continue to see strong attachment of our HR solutions, retirement, and time and attendance products.
Demand for our ERTC service remains strong and contributed approximately 1% to revenue growth in the quarter. Demand for this product along with our internal execution have continued to exceed our expectations, while ERTC has been a tailwind, and we expect demand to continue into fiscal year '24. It will eventually become -- will eventually moderate and become a headwind as we progress through next year -- next fiscal year.
Beyond Insurance Solutions, revenue increased 6% to $321 million, driven by higher revenue per client and growth in average worksite employees. The rate of growth was impacted by factors previously discussed, including lower medical plan sales and participant volumes along with the mix shift to ASO, as John called out. We expect these trends to normalize as we progress through fiscal 2020, meaning a little bit more of a balance between PEO and ASO.
Interest on funds held for clients increased significantly to $35 million in the quarter, primarily due, as you know, to higher average interest rates. Total expenses were up 8% to $769 million. Expense growth was largely attributable to higher headcount, wage rates in general course to support growth in our business. Op income increased 9% to $612 million, with an operating margin of 44.3%, a slight expansion over the prior year period.
Our effective tax rate for the quarter was 24.3% compared to 22.3% in the prior year period. The prior year period included a higher volume of stock-based comp payments and the recognition of a tax credit related to our development of client-facing software that generated the difference in rates. Net income increased 9% to $467 million and diluted earnings per share increased 8% to $1.29 per share. Adjusted diluted earnings per share increased 12% for the quarter to $1.29 per share.
Let me quickly summarize the results for the first nine months of the fiscal year. Performance has been strong. Total service revenue increased 8% to $3.7 billion and total revenue was up 9% to $3.8 billion. Management Solutions was up 9% to $2.8 billion. PEO and Insurance Solutions up 6% to $877 million. Op income increased 9% with a margin of 41.8%. Adjusted net income and adjusted diluted earnings per share both increased 12% to $1.2 billion and $3.31 per share.
Our financial position remains strong, as you can see with cash, restricted cash, and total corporate investments of more than $1.6 billion. Total borrowings of approximately $808 million as of February 28, 2023. Cash flow from operations, again solid for the first nine months was at $1.3 billion and with an increase from priority driven by higher net income and changes in working capital. We've had our quarterly dividends at $0.79 per share for a total of $854 million during the nine months of fiscal 2023 or 12-month rolling return on equity was a stellar superb 47%.
Now, let me turn to our guidance for the current fiscal year ending May 31, 2023. Our current outlook incorporates our results for the first nine months in our view of the evolving macroeconomic environment. We have raised guidance on certain measures based on performance this past quarter, updated guidance is as follows. Management Solutions revenue now expected to grow at/or slightly above 8%. We previously guided to a range of 7% to 8%. PEO and Insurance Solutions outlook is unchanged at growth in the range of 5% to 7%, although we anticipate it to be towards the lower end of the range. We expect Q4 PEO and Insurance Solutions growth to be below 5%, due to the factors that we've talked about through much of the year.
Interest on funds held for clients is expected to be in the range of $100 million to $105 million. Total revenue is expected to grow approximately 8%. Other income and expense net is now expected to be income of $10 million to $15 million, obviously due to higher interest rates. Remember, we met interest income there with our expense on the debt. Adjusted diluted earnings per share is now expected to grow in the range of 13% to 14%. We previously guided to growth of 12% to 14%. So we tightened the range, obviously, one quarter left.
Guidance for margins and effective tax rates are unchanged, but we do anticipate being on the higher end of the range for operating margin and the lower end of the range for effective tax rate. We currently are in the middle of our annual budget process and are working on expectations for next fiscal year. As you know, this is challenging for a number of different reasons, not the least of which are expected outcomes in terms of interest rates and also macroeconomic environment. We'll provide final guidance for fiscal 2024 during fiscal 2023's fourth quarter earnings call in June.
However, let me share some of our preliminary thought process around fiscal 2024. On a preliminary basis, we believe that the exit rate in the fourth quarter is a decent approximation for total revenue growth for 2024. This should result somewhere in the range of 6% to 7%. And again, we got more to do there, but just giving you what our thought process is at the moment. And it's heavily dependent on what we think will happen with interest rates during the year and at this point, our assumptions are conservative.
Management Solutions is expected to be lower as a result of moderating ERTC revenues. We called that out last year didn't happen. It actually went the other way. We do think it's going to happen next year. And then PEO and Insurance revenue growth is expected to trend higher as we progress through the year with moderation in some of the headwinds we have experienced this year primarily around insurance attachment and also, as we called out several times a mix shift to ASO.
We remain committed to improving margins and we anticipate that operating margin will expand at this stage in the range of 25 basis points to 50 basis points for fiscal 2024. Of course, all of this is subject to our current assumptions, which can change, especially if there are significant changes to the macroenvironment, which at this stage, we are not seeing. I'll refer you to our investor slides on our website for more information.
And now, let me turn the call back over to John.