Albert Ho worked a number of human rights cases on a pro bono (undertaken voluntarily and without payment) for the pan-democracy camp.

He ran again in the 1991 Urban Council election in Southern District but was again losing to incumbent Joseph Chan Yuet-sut of the conservative Liberal Democratic Federation of Hong Kong.

[4] In the first Legislative Council election of the SAR period in 1998, Ho won a seat in the New Territories West with his party colleague Lee Wing-tat.

On 20 August 2006, Ho was assaulted by three unidentified men using baseball bats and a baton[5] in a McDonald's restaurant in Central, Hong Kong, after he had attended a protest against the government's plan to adopt a Goods and Services Tax.

He was challenged by radical democrat legislator Albert Chan in his Lok Tsui constituency in the following 2011 District Council election and barely retained his seat.

[8] Having won the pan-democratic primary against Frederick Fung of the ADLP on 8 January 2012,[9] Ho ran against the two pro-Beijing candidates, ex-convenor of the Executive Council Leung Chun-ying and former Chief Secretary Henry Tang.

[13] On 18 April 2020, Ho was one of 15 Hong Kong high-profile democracy figures arrested on suspicion of organizing, publicizing or taking part in several unauthorized assemblies between August and October 2019 in the course of the anti-extradition bill protests.

[14][15] In May 2021, he was sentenced to two jail terms of 18 months each, to be served concurrently, for inciting and organizing a banned protest on China's National Day on 1 October 2019.

[17] Soon thereafter, several politicians from the pro-democracy camp – notably Roy Kwong, Stanley Ho Wai-hang of the Labour Party and Leung Kai-Qing were also attacked in the street.

[18][19] On 21 August 2019, Ho was named by Chinese state media as one of the "Gang of Four who bring ruin to Hong Kong" alongside Apple Daily owner Jimmy Lai, Democratic Party founding chairman Martin Lee and former Chief Secretary Anson Chan.

[20] Soon after the June 2020 imposition of the Hong Kong national security law by the PRC Standing Committee of the National People's Congress, Ho told The Daily Telegraph that he feared that "people like him" may face "difficulties in the times to come" as global banks like Credit Suisse, HSBC, Julius Baer and UBS were in the process of "broadening scrutiny" to "screen clients for political and government ties" and subjecting pro-democrats to "additional diligence requirements".

"[21] In September 2021, Ho resigned from his leadership positions within the Hong Kong Alliance, the China Human Rights Lawyers Concern Group, and the New School for Democracy.

[22] The Alliance had come under heavy attack by authorities at that time, with two national security investigations underway against it and its lead members; earlier that month, before his resignations, Ho had pleaded guilty to taking part in or inciting others to participate in the 2020 Tiananmen Massacre vigil.

[23] A first bail application by Ho over a charge of subversion of state power in relation to his role in the Hong Kong Alliance was rejected on 20 July 2022,[24] but a second one was granted on 22 August 2022.

[26] On 12 April 2024 Albert Ho (then aged 72) received from the Hong Kong Court of Final Appeal a suspended sentence following conviction for taking part in an unauthorised procession in August 2019.