run up a tab

run (up) a tab

To incur or accumulate charges that one must pay at a later time or date. It's a bit hypocritical for these politicians to be pushing legislation that raises the price of alcohol, while they're all there running up huge tabs at the parliament bar each week. Don't worry about the cost of anything while you're here; I'm running a tab with the hotel.
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run up a tab

If someone runs up a tab, they do things that cause them to owe money. The 62-year-old pop star has run up a tab of $2.1 million at Claridge's Hotel in Mayfair.
See also: run, tab, up