Here’s a tip: don’t be cheap!

Yet another nor’easter is in the forecast for the Mid-Atlantic and Northeast Wednesday with meteorologists predicting a foot of snow. Weather experts say people in Boston, New York, Philly and much of the area will get slammed by heavy snow, high winds and possible power outages.

One look at that, and your sweats-clad, working-from-home self is going to log right into your GrubHub account.

Also see: You’re definitely not tipping these people enough

Let us make a suggestion: Do not scrimp on the tip. You should be tipping between 25-30% “depending on how bad the conditions are and what someone has to maneuver through to get to you,” says Constance Hoffman, the owner of etiquette and professional skills firm Social and Business Graces.

Stefie Gan for Moneyish

If the delivery requires extreme effort (you live on top of a huge hill, in a walk-up, or you’re getting a ton of stuff), you should tip an extra $5 – $10, says Pamela Eyring, the president of the Protocol School of Washington. She adds that it’s also nice to offer them coffee or hot chocolate when they arrive.

If past snowstorms are any indication, most of you won’t do this. When snow has dumped down on cities like New York, Washington D.C., Chicago, Philadelphia and Boston, those ordering food never exceeded a 20% tip, according to data from Seamless and Grubhub for past storms in 2015 and earlier this year, reported by Vocativ.