If you're planning any type of vacation this summer, make sure you have some extra cash on hand. That's because when you're making your travel budget, you don't want to forget about tipping. It's hard to know exactly what to give the people who help you, that's why Consumer Reports is sharing their guidelines.

Airport: If you use a porter, you should give them five dollars for one bag, and $3 to $5 for each additional bag.
If you use a taxi or a limo service, 10% to 20% to the driver.
Hop on a courtesy shuttle? If the driver helps you with your bags, they should get one to two dollars per bag.

Hotel: Give the doorman $2 to $5 if they hail you a cab.
The bellman that takes your bags to your room should get one to two dollars per bag.
The hotel maid should receive $2 to $10 per night depending on the type of hotel.

Cruise: Cabin stewards should get $5 per night
Baggage service should get $2 per bag.
The bartender should receive 15% to 20% of your tab.
Your dining room server should get $4 to $5 per day.

Tipping is a little different in other countries but there's an app to help you. Search for "The Global Tipping Guide Pro" on your Apple or Android device.