“That is outside my budget this week” is enough information to decline a weekend plan. You can value the friendship without buying every version of spending time together.
The difficult part may be answering early. A vague “maybe” can feel easier than a refusal, but it leaves the organiser unsure whether to reserve a seat or include you in a shared cost.
Give a clear answer while the plan can change
The RBI's budgeting guidance encourages comparing planned expenses with actual spending. A plan with friends is one of those expenses, even when everyone describes it as a small amount.
Before replying, check the whole cost: travel, food, entry and any shared commitment. You do not need to send that calculation to the group. The student budgeting guide can help you set the limit privately.
Then choose a response rather than a promise to “figure something out”.
Use the version you mean
These are suggested scripts:
You want a cheaper alternative: “I cannot do that spend this weekend. I would like to meet, though. Would tea after class work?”
You are skipping this plan entirely: “Please count me out for this one. Hope you have a good time; I will catch up another day.”
Someone offers to pay: “Thank you. Before I say yes, are you offering this as a treat? I do not want us to have different expectations afterwards.”
Someone keeps pushing: “I have decided not to spend that amount. You do not need to change your plan, but please do not book for me.”
There is no obligation to offer an alternative you do not actually want. A quiet weekend is an option too.
Close the loop on anything already agreed
If you previously confirmed a shared booking, say so promptly and discuss the agreed cancellation arrangement. Declining a new plan and leaving friends with an existing cost are different conversations.
Avoid making extra work the automatic solution to every expensive invitation. For students aged 18 and over, earning time still comes from a real week with other commitments. Send the message, make sure the organiser has understood it, and let the conversation move on.