Viktor Barzin
57484619c1
Extracted from /home/wizard/code monorepo into its own repo so Woodpecker CI can watch it. Identical content to /home/wizard/code commit e426028. See README.md for overview, env vars, and Paperless workflow config. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
16 lines
612 B
Python
16 lines
612 B
Python
from datetime import date
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UK_TAX_YEAR_START_MONTH = 4
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UK_TAX_YEAR_START_DAY = 6
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def derive_tax_year(pay_date: date) -> str:
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"""Return the UK tax year label (e.g. "2026/27") for a given pay date.
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UK tax years run 6 April to 5 April. A pay_date on 5 Apr belongs to the
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previous start-year; on 6 Apr it belongs to the current start-year.
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"""
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boundary = date(pay_date.year, UK_TAX_YEAR_START_MONTH, UK_TAX_YEAR_START_DAY)
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start_year = pay_date.year if pay_date >= boundary else pay_date.year - 1
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end_year_suffix = str(start_year + 1)[-2:]
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return f"{start_year}/{end_year_suffix}"
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