The Obama administration will have to decide whether to delay — or possibly suspend — tens of billions of dollars in Social Security checks, food stamps and unemployment benefits if negotiations to raise the federal debt ceiling are not resolved this week, experts say, one of the many difficult choices officials will have to make at a time when the government will essentially be running on fumes.

The government will begin Monday with about $30 billion cash in the bank and a little more room to borrow as a result of extraordinary measures launched in the wake of the debt-ceiling crisis. By Thursday, administration officials say they will exhaust all borrowing authority and have only that cash on hand.

Experts on federal finances say that money might be enough to make payments for a few days, but certainly not for more than two weeks. In any event, they say, President Barack Obama will have to make untested decisions about who and what to pay because daily tax receipts will make up only about 70 cents of every dollar of necessary spending.