Financial Secretary Paul Chan on Sunday said officials plan to go ahead with a proposed land departure tax for private cars, saying this represented a wealthier demographic in society.

The proposal announced in the budget last week met some opposition, with some lawmakers saying it wouldn't help Hong Kong's integration into the Greater Bay Area.

But Chan said these drivers amount to about 15 percent of the some 100 million departures annually, so there wouldn't be too many people affected.

"Because we spent much on these border facilities in terms of construction, and there are also maintenance costs," he said on a TVB programme.

"From a user's pay perspective, we ought to get some money back. We don't want to bother the general public."

Chan stressed the government was still open to ideas and welcomed discussions.

The minister said there were many ways for people to cross the border, adding the government would not consider charging passengers who take the express rail.

Meanwhile, the administration plans to raise more than HK$150 billion worth of bonds every year for the coming five fiscal years, in part to finance infrastructure projects.

Chan said the government would mainly issue short-term bonds, but added it has also received local market feedback expressing interest in longer term, Hong Kong dollar bonds that could be considered stable investment tools.