The impasse has already snarled travel, delayed government approvals for permits and loans and shuttered some museums.
Now as millions of federal workers across the government start to miss paycheques this week and respond by curtailing spending, analysts say the impact will start to reverberate more widely.
“We’re reaching this critical inflection point in terms of the government shutdown and its ramifications for the broader economy,” said Stash Graham, managing director of Graham Capital Management.
There are already signs that business and consumer confidence have dropped, in a possible indicator of economic weakness ahead.
Analysts said the delay or suspension of key releases of economic data, like the monthly jobs report, is adding to uncertainty, prompting firms to put spending decisions on hold and raising the risk of error as policymakers proceed without the best information.
In Utah, Mr Galletly said he had started to pull back his purchases in the lead-up to the shutdown, scrapping plans to buy a camper trailer, opting for a second-hand laptop for his daughter, and postponing plans to replace windows, including one that is leaking.
Now, with the prospect of missing his first paycheque next week, he has applied for unemployment insurance, and reached out to the banks holding his mortgage and car loan, hoping for accommodation.
“A lot of people tend to look at these things and just hope for the best,” he said. “Having been through this before – this is my third government shutdown as a federal employee – I just can’t afford to do that.”