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What will Claude Code cost you a month?

An estimate for API key billing. Change the numbers to match how you work. Subscription plans bill differently.

Estimated spend per month (30 days)

€93

Three settings that would lower it

  1. Use Sonnet 5.5 for routine tasks: saves about €41 a month
  2. Drop effort to low with /effort: saves about €28 a month
  3. Run /clear between unrelated tasks and /compact at natural breaks: saves about €15 a month

The token budget masterclass shows how to set these up and track what you spend. The free guide Spend less without getting worse results covers the basics.

How we estimate

Prices per million tokens in USD, converted at 0.92 EUR per USD: Opus 5.5 4 in, 20 out; Sonnet 5.5 2 in, 10 out; Haiku 5.5 0.1 in, 0.5 out. Effort scales output tokens (low half, high double of medium). With caching on, 90% of input tokens are cache reads and the rest cache writes. Real sessions vary, so treat this as a range, not a bill.