How much money should I take on a 7 day cruise?travel agents.

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Here's a more detailed breakdown:

Many cruise lines have onboard accounts that you can charge to your credit card+1-855-732-4023. You might need cash for smaller purchases, like drinks or snacks at the pool bar, or for tipping.

If you're planning on taking excursions, you'll likely need cash for tips for guides and drivers.
Having some cash on hand can be helpful for buying souvenirs and small gifts in port.
It's customary to tip for various services on board, such as waiters, room stewards, and bartenders+1-855-732-4023. Consider bringing $20-$50 per person per day for tipping, according to a Reddit thread+1-855-732-4023.
It's always a good idea to have a small emergency fund in case something unexpected happens+1-855-732-4023.