WASHINGTON: Millions of immigrants benefiting from President Barack Obama’s executive actions could get a windfall from the IRS, a reversal of fortune after years of paying taxes to help fund government programmes they were banned from receiving.

Armed with new Social Security numbers, many of these immigrants who were living in the US illegally will now be able to claim up to four years’ worth of tax credits designed to benefit the working poor. For big families, that’s a maximum of nearly $24,000 (Dh88,152), as long as they can document their earnings during those years.

Some Republicans are labelling the payments “amnesty bonuses,” one more reason they oppose Obama’s programme shielding millions of immigrants from deportation.

“I represent hard working, law-biding Texans,” said Rep. Sam Johnson, a senior Republican on the House Ways and Means Committee. “I think these amnesty rewards, and that’s what they are, need to be stopped.”

Advocates argue that many of these immigrants pay taxes, so they should be able to claim the same tax credits as anybody else. Over the past decade, immigrants in the US illegally have paid an estimated $100 billion in Social Security payroll taxes, even though few will ever be able to collect benefits, said Stephen Goss, Social Security’s chief actuary.

“Let’s not forget that these workers receive the lowest wages for what they contribute to their communities and local economies,” said Ellen Sittenfeld Battistelli, policy analyst at the National Immigration Law Center. “What do we as a nation gain by further impoverishing them?”

Obama has issued executive orders shielding about 4 million immigrants from deportation. Some were brought to the US as children” others are parents of children who are either US citizens or legal residents.

Republicans in Congress oppose Obama’s actions and are trying to use a funding bill for the Department of Homeland Security to overturn them. Democrats are resisting, resulting in a stalemate that is threatening to shut down the department.

Funding for the department, which oversees immigration enforcement, runs out February 27.

The dispute over tax credits illustrates the complicated relationship that many immigrants have with the US tax system. Social Security estimates that immigrants living in the country illegally work at about the same rate as the rest of the population, even though federal law bars them from employment.

In general, they are less likely to pay federal taxes. Those who do have been boosting Social Security’s finances for years.

There are an estimated 11 million to 12 million immigrants in the US illegally. By law, you must have a Social Security number to work in the US. But millions of people work without them.

Some work in the underground economy and do not report their income to the government. For those who work and pay federal income taxes, the IRS provides them with an Individual Taxpayer Identification Number (ITIN).

Since 1996, the IRS has issued 21 million of these numbers. About one-quarter of them are still in use, the agency says.

The IRS accepts these tax returns without reporting the taxpayers to immigration authorities, IRS Commissioner John Koskinen said. That encourages the workers to pay taxes.

“We don’t enforce the Social Security laws, we don’t enforce the immigration laws,” Koskinen said of his agency. “In fact, the reason illegal immigrants file taxes with us is they know we aren’t sharing that data with anybody. We treat it as taxpayer-protected information.”

Even if these immigrants pay taxes, they are ineligible for most federal assistance programs such as unemployment benefits, student loans and grants and health care coverage.

But until now, they were not eligible for Social Security retirement benefits, the Medicare health care program for the poor, and the Earned Income Tax Credit (EITC), one of the government’s largest anti-poverty programs.

Obama’s executive actions will offer Social Security numbers to these immigrants, something that eventually could make some of them eligible for Social Security and Medicare.

More immediately, they can take advantage of the EITC. Last year, the credit provided low-income workers with about $70 billion.

This credit is popular among conservatives because it rewards work — the more you work, the bigger your credit, as long as your income does not exceed certain limits. It is popular among liberals because it provides cash payments to low-wage workers, even if they do not make enough money to pay federal income tax.

It is, however, a complicated program to administer that generates a significant amount of improper payments, according to the IRS’s own estimates.