Lloyd Yates
President and Chief Executive Officer at NiSource
Thanks, Chris. Good morning, everyone, and thank you for joining us. By the end of the call, we want to leave you with three takeaways of our business and our future. I'd like to reiterate our confidence, progress and focus. Our confidence in our strategic plan and our strong progress in delivering on our commitments. Our progress on our regulatory initiatives, including pursuing a potential settlement in the NIPSCO electric rate case, and our focus on realizing the upside potential beyond our existing plan. We will touch on some of these incremental investment opportunities later in today's presentation.
Turning to our performance. 2022 was a year of relentless and consistent execution by our team. Among the keys to our success in 2022 was our comprehensive business review. We believe the goals detailed at our Investor Day are both significant and achievable, and we will measure our progress against our premium utility growth plan each quarter.
Our results this quarter and in 2022 were strong and demonstrate that we are off to a great start in the execution of our plan. We delivered earnings above our 2022 guidance and are raising our 2023 guidance. We also grew our dividend 6.4%. We remain on track to drive shareholder value for a compelling 9% to 11% total shareholder return. At Investor Day, we committed to optimizing our cost profile and enhancing operational efficiency. We are doing it by transforming both our IT systems and the work process that they support. Behind processes and technology are our people. I want to thank each of our employees for their performance throughout 2022 and a deep commitment to serving our customers.
Let's turn to Slide 5 of the presentation and take a closer look at our 2022 key achievements. NiSource's '22 earnings exceeded our guidance range. We delivered $1.47 non-GAAP diluted NOEPS. That's up more than 7% from last year. It reflects our continued investment in safety, reliability, customer affordability and sustainability.
Looking to 2023, we've increased our guidance range to $1.54 to $1.60 per share. This reflects our outperformance in 2022 and confidence in 2023 execution. We're reaffirming our expectation of a 6% to 8% annual NOEPS growth through 2027 as well as our annual 8% to 10% rate base growth.
Slide 6 illustrates 2023 guidance and our commitment to grow 6% to 8% annually through 2027. Driving this top-tier growth are investments of $15 billion in regulated capex from 2023 through 2027. A high-level summary of which you can see on Slide 7.
Looking out further, we continue to expect to invest $30 billion from 2023 to 2032. As I alluded to earlier, execution by our regulatory team continues to be a strength. In 2022, we filed four rate cases and resolved three, in Pennsylvania, Maryland, in the Indiana gas case. In addition, the Ohio rate case concluded last month. These cases represent balanced outcomes supporting all stakeholders.
Turning to Page 8. We have the following key priorities for 2023. First, continue to enhance our focus on safety and operational excellence. Second, the successful sale of our minority interest in NIPSCO to strengthen our balance sheet. Next, a balanced outcome in the NIPSCO electric rate case, which we will cover in a few moments. Fourth, driving efficiencies to achieve flat O&M spending to enhance customer affordability. These efforts will keep our customer rates sustainable with expected total annual rate increases that are inline with inflation. And finally, our commitment to delivering on our 2023 guidance. These are the priorities that we will keep top of mind throughout the year.
On Slide 9, you will see the additional investment opportunities NiSource may pursue in both the near and long term. NiSource's investment opportunities include replacing pre-1985 plastic gas pipes as well as gas transmission replacements and reconfirmation to comply with FEMSA regulation. In addition, electric generation tax credit transferability and advanced gas metering infrastructure also represent attractive opportunities for NiSource in the near term. Beyond 2027, we see the need to add electric generation capacity in the marketplace and to enhance electric grid hardening. NiSource electric long-range transmission projects, elect transportation renewable gas infrastructure and hydrogen production hubs also makeup long-term and large-scale projects we will seek to participate in to enhance our investment portfolio and drive greater value for our customers.
Now let's turn to Page 10 to review some fourth quarter and recent highlights from gas distribution operations. Columbia Gas of Ohio received an order accepting the settlement in its rate case on January 26. The order includes a revenue increase of $68.2 million net of riders. New rates will be effective on March 1. The settlement in our Pennsylvania rate case was approved in December. It enables continued investments in replacement of aging pipe and system upgrades needed to ensure service reliability and pipeline safety. New rates went into effect December 17.
Finally, Columbia Gas of Maryland received an order in November, approving its rate case settlement. The settlement supports the company's continued investments in infrastructure replacement and system upgrades.
Now for updates on our electric operations and renewables projects, I'd like to turn it over to Shawn Anderson.