There will be significant benefits of the new tax system President Donald Trump signed into law Friday that extend beyond lower rates and a more generous child tax credit. It will mean less aggravation for millions of people.

And that means more than convenience in April, according to experts. It translates into real financial savings.

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Measuring the costs of complying with the incredibly byzantine federal tax code is difficult. But the National Taxpayers Union took a stab at least at part of it, calculating that Americans will spend 210 million fewer hours with pencils and calculators as a result of just one change — reducing the number of taxpayers who will have to itemize.

The Tax Cuts and Jobs Act doubles the child tax credit, roughly doubles the standard deduction and raises the income thresholds at which higher tax rates kick in. All of that means more people will be able to file under the standard deduction — an estimated 90 percent of all taxpayers.

That in turn means those folks will not have to pore through the tax code looking for write-offs, will not have to fill out extra tax forms, and will not have to keep track of items such as how much interest they pay in a given year on their mortgages.

Pete Sepp, president of the National Taxpayers Union (NTU), estimated all those hours added up will produce a savings of about $13 billion. Tax preparation companies might take a hit, but Sepp said it would still be an overall gain for the economy.

“There will be improvements in production, freeing up restrictions on economic activities by not locking that [money] into one particular activity,” he said. “That could very well lead to back-end business creation. We’re not talking about huge numbers here. But it’s a start.”

Grover Norquist, president of Americans for Tax Reform (ATR), noted that the new law also dramatically reduces the impact of the Alternative Minimum Tax (AMT), a levy originally designed to prevent the super-wealthy from using deductions and loopholes to avoid paying at higher rates. In recent years, because of inflation, the tax had begun to bite people below the über-rich on the income scale.

Norquist said changes in the corporate tax code also improve simplicity. “Real savings on compliance, as well as rates,” he said. “Life gets a lot easier.”

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Beyond the tax savings, Norquist said, millions of Americans will avoid a hassle. The AMT requires people affected to figure out their tax burden twice — once under the regular system and once under the AMT rules — and then pay whichever tax bill was higher.

Lower tax rates also lessen the benefit of little breaks that litter the tax code, Norquist said.

“It makes every credit and deduction worth less,” he said.

Norquist said changes in the corporate tax code also improve simplicity. “Real savings on compliance, as well as rates,” he said. “Life gets a lot easier.”

Polls show stiff opposition among Americans to the tax cuts, in large part because many people believe they will pay more. Although the vast majority of Americans will be taxed less under the law, many have been confused by media coverage, Norquist said.

“They’ve all been lying to people for three months,” he said.

Related: Dems Bash Corporate Tax Cuts Even as Their Blue States Slash Rates

But Norquist said that will change in February when withholding adjustments fatten workers’ paychecks.

“As soon as they start seeing those paychecks, that problem goes away, and it becomes a problem for the Democrats,” he said.

There is one bit of bad news, however. The savings of time and money spent on navigating the tax code will not show up until 2019. This April, Americans will have to file their tax returns under the old rules.

PoliZette senior writer Brendan Kirby can be reached at [email protected]. Follow him on Twitter here.