Steven J. Johnston
Chairman and Chief Executive Officer at Cincinnati Financial
Thank you, Dennis, and good morning. Thank you for joining us today to hear more about our results. We had strong operating performance in the fourth quarter. And I'm happy to see that our hard work is reflected in the progress we're making.
Net income rose $170 million to nearly $1.2 billion for the fourth quarter compared with the fourth quarter of last year, including $18 million more benefit on an after tax basis in the fair-value of securities still held in our equity portfolio. Non-GAAP operating income for the fourth quarter of 2023 was up 78% or $157 million versus a year ago. And on a full-year basis, it was 42% higher than 2022.
Our 87.5% fourth quarter, property-casualty combined ratio was 7.4 percentage points better than in 2022 with the catastrophe loss ratio representing 6.5 points of the improvement. That strong underwriting performance followed our recent pattern of improvement, resulting in a 94.9% full-year 2023 combined ratio that was 3.2 percentage points better than last year, including a decrease of 0.5 points in the catastrophe loss ratio.
Our 2023 ex-cat accident year combined ratios were also favorable compared with 2022 improving 2.1 percentage points to 85.7% for the fourth quarter and 1.8 points to 88.4% for the year. We saw positive momentum in many areas of operating performance. Growth for consolidated property-casualty net written premiums accelerated reaching 13% for the fourth quarter, including 10% for renewal premiums and 30% for new business premiums.
As part of our ongoing efforts to improve performance and to counter the continuing effects of inflation on insured losses, we combined pricing segmentation by risk with average price increases in careful risk selection. Estimated average renewal price increases for the fourth quarter continued at a healthy pace. Our Commercial Lines Insurance segment, again averaged near the low end of the high-single-digit percentage range, while our Excess and Surplus Lines Insurance segment continued in the high-single-digit range.
Personal lines for the fourth quarter included auto continuing in the low-double-digit range and homeowner continuing near the low-end of the high-single-digit range. Policy retention rates in 2023 were similar to 2022 with our commercial lines segment down slightly, but still in the upper 80% range. And our Personal Lines segment up slightly, but still in the low-to-mid 90% range.
Briefly reviewing operating performance by insurance segment, I'll focus on the full year results, although I will note that each segment improved their combined ratios in the fourth quarter compared to last year as they continue to grow profitably. Our Commercial segment improved its full year 2023 combined ratio by 3.0 percentage points compared with 2022 and grew net written premiums by 4%. Our Personalized segment grew net written premiums by 26% with growth for middle-market business, in addition to Cincinnati Private Client business, its combined ratio was 1.2 percentage points higher than last year due to the catastrophe loss ratio rising 3.7 points.
Our Excess and Surplus Lines segment was very profitable, producing a 2023 combined ratio of 90.6% with net written premium growth of 14%. Both Cincinnati Re and Cincinnati Global were also very profitable. Cincinnati Re's full year combined ratio was an excellent 77.7%. Its net written premiums were 5% lower than in 2022, reflecting our opportunistic positioning of the portfolio through evolving market conditions. Cincinnati Global's combined ratio was also excellent at 75.5% with 22% growth in net written premiums. Our life insurance subsidiary grew profit and premiums, too, as full year 2023, net income rose 15% and earned premiums grew 4%.
On January 1 of this year, we again renewed each of our primary property casualty treaties that transfer part of our risk to reinsurers. For our per risk treaties, terms and conditions for 2024 are fairly similar to 2023, other than an average premium rate increase of approximately 12%. The primary objective of our property catastrophe treaty is to protect our balance sheet. The treaty's main change this year is adding another $100 million of coverage, increasing the top of the program from $1.1 billion to $1.2 billion. Should we experience a 2024 catastrophe event totaling $1.2 billion in losses, we'll retain $423 million compared with $617 million in 2023 for an event of that magnitude.
We expect 2024 seeded premiums for these treaties in total to be approximately $180 million more than the actual $136 million of seeded premiums for these treaties in 2023, due to additional coverage, rate increase and subject premium growth. Those who follow our company know we prefer to track our success over a long time horizon. Consistent with that approach, we set a target for the value creation ratio, our primary performance measure, at an annual average of 10% to 13% over the next five years. We believe the VCR is an appropriate measure, since it's driven by strong combined ratio results, premium growth that exceeds the industry average and contributions from our investment portfolio.
Since 2016, our combined ratio five-year average has ranged from 94.3% to 96.1%, near the low end of the longer term target of 95% to 100% we've disclosed for many years. And for more than a decade, we've recorded results ahead of the industry for premium growth on a five-year compound annual growth rate basis. Because we believe we can continue to perform at a high level, we are setting our sights on a longer term combined ratio better than the past target, now targeting a five-year average of 92% to 98%.
While we will no longer publicly disclose annual targets for combined ratio and premium growth, we expect to continue our robust disclosure detail to help investors model and form their own expectations of future results. This doesn't mean that we'll ignore the shorter term results. We recognize that it also means that to achieve our revised long-term target range, some years we need to reach combined ratios towards the lower end, knowing there could be some years like 2022 that come in near the higher end.
I'll conclude my prepared remarks as usual with the value creation ratio. Our 15.2% five-year annual average VCR as of year end 2023 exceeded our target range of 10% to 13%. VCR of 19.5% for full year 2023 included a contribution of 9.1% from net income before investment gains or losses, while higher valuation of our investment portfolio and other items contributed 10.4%.
Now, Chief Financial Officer, Mike Sewell will highlight investment results and other important aspects of our financial performance.