The corrupt who managed to escape the Malaysian Anti-Corruption Commission's (MACC) dragnet can still be snagged under Malaysia's tax laws.

MACC chief commissioner Dzulkifli Ahmad issued the warning today during his speech at a Corruption-Free Pledge-signing ceremony with over 150 Inland Revenue Board staff, led by its chief executive officer Sabin Samitah.

"Even if MACC's investigations did not reveal enough information for action to be taken under the MACC Act, these 'corrupt' who may feel that they can get away scot-free, they will not escape from IRB's actions," said Dzulkifli in his speech at IRB's headquarters in Cyberjaya.

Actions by IRB under the Income Tax Act 1967, he said, would be on top of MACC's existing powers under its own Act and the Anti-Money Laundering and Anti-Terrorism Financing Act 2001.

Dzulkifli further said the corrupt had a tendency to not declare their income to the IRB, as the source of income would be unclear.

"But IRB does not look at the source of income. Whether it is 'halal or haram', it just looks at (undeclared) income.

"So I will like to warn all corrupt people out there, you will not escape," he stressed.

He also said the action could now be taken following the anti-graft agency's strategic cooperation signed with IRB last December.

On the signing of the Corruption-Free Pledge, Sabin earlier said the move was done to strengthen the public's trust in IRB.

"As the agency responsible to enforce tax-related laws, I don't deny there is a risk of IRB officers being wooed with 'offers' or bribes to assist certain parties who want to evade from paying taxes," he said.

The IRB is the first federal agency to sign the Corruption-Free Pledge - a personal pledge of individual staff and officers - after it had similarly signed on to MACC's Corporate Integrity Pledge in November 2013.