Exhibit 99.1

TATA MOTORS LIMITED

Bombay House

24, Homi Mody Street,

Mumbai 400 001, Maharashtra, India

Intimation of Board Meeting on January 25, 2023 under Regulation 29 and Regulation 50 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 ("SEBI Listing Regulations")

Mumbai, January 5, 2023: We hereby inform that a Meeting of the Board of Directors (the "Board") of Tata Motors Limited (the “Company”) is scheduled to be held on Wednesday, January 25, 2023 (the “Meeting”), inter alia, to consider and approve the Audited Financial Results and Unaudited Consolidated Financial Results (with Limited Review) for the third quarter ended December 31, 2022.

Further, we would like to inform you that as per the 'Tata Code of Conduct for Prevention of Insider Trading' pursuant to the SEBI (Prohibition of Insider Trading) Regulations, 2015 (as amended), the Company has intimated its 'Designated Persons' regarding closure of the Trading Window from December 25, 2022 till the expiry of 48 hours from the date the aforesaid Financial Results are made public i.e., January 27, 2023.

Pursuant to Regulation 30 of the SEBI Listing Regulations, we would like to inform that post announcement of the Financial Results to Indian Stock Exchanges, the Company will have an Analyst call on the same day, which would also be announced on the Company's website at www.tatamotors.com.

We would request you to take the above information on records.

- ENDS -

About Tata Motors

Part of the USD 128 billion Tata group, Tata Motors Limited (NYSE: TTM; BSE: 500570 and 570001; NSE: TATAMOTORS and TATAMTRDVR), a USD 37 billion organization, is a leading global automobile manufacturer of cars, utility vehicles, pick-ups, trucks and buses, offering extensive range of integrated, smart and e-mobility solutions. With ‘Connecting Aspirations’ at the core of its brand promise, Tata Motors is India’s market leader in commercial vehicles and amongst the top three in the passenger vehicles market.

Tata Motors strives to bring new products that fire the imagination of GenNext customers, fueled by state of the art design and R&D centers located in India, UK, US, Italy and South Korea. With a focus on engineering and tech enabled automotive solutions catering to the future of mobility, the company’s innovation efforts are focused to develop pioneering technologies that are sustainable as well as suited to evolving aspirations of the market and the customers. The company is pioneering India's Electric Vehicle (EV) transition and driving the shift towards sustainable mobility solutions by preparing a tailor-made product strategy, leveraging the synergy between the Group companies and playing an active role liasoning with the Government in developing the policy framework.

With operations in India, the UK, South Korea, Thailand, South Africa and Indonesia, Tata Motors’ vehicles are marketed in Africa, Middle East, South & South East Asia, Australia, South America, Russia and other CIS countries. As of March 31, 2022, Tata Motors’ operations include 86 consolidated subsidiaries, two joint operations, four joint ventures and 10 equity-accounted

associates, including their subsidiaries, in respect of which the company exercises significant influence.

To know more, please visit (www.tatamotors.com; also follow us on Twitter: https://twitter.com/TataMotors)

Media Contact Information:

Tata Motors Corporate Communications: +91 22-66657613 / indiacorpcomm@tatamotors.com

Safe Harbor: Statements included herein may constitute "forward-looking statements". Forward-looking statements are based on expectations, forecasts and assumptions by management and involve risks, uncertainties, and other factors that may cause our actual results, performance or achievements to materially differ from those stated. We cannot be certain that any expectation, forecast or assumption made by management in preparing these forward-looking statements will prove accurate, or that any projection will be realized. More detailed information about these and other factors that could affect future results is contained in our annual reports and filings with the Securities and Exchange Commission. Our forward-looking statements pertain to the date of their initial issuance, and we do not undertake to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.