for your sins

for (one's) sins

As a punishment or disciplinary action for one's wrongdoing. Primarily heard in UK. Let me guess—I have to clean the toilets for my sins.
See also: sin
Farlex Dictionary of Idioms.

for your sins

used to suggest that a task or duty is so onerous or unpleasant that it must be a punishment. chiefly British
1994 John Birmingham He Died With Felafel In His Hand Then the extended family that is Brisbane sent some people along to keep me company, and for my sins, I took them in.
See also: sin
Farlex Partner Idioms Dictionary

(do/be something) for your sins

(spoken, humorous, especially British English) be/do something as a punishment: ‘I hear you’re going to be the new manager.’ ‘Yes, for my sins.’
See also: sin
Farlex Partner Idioms Dictionary
See also:
  • for (one's) sins
  • for my sins
  • on report
  • on the anxious seat
  • silence
  • blue code of silence
  • blue wall of silence
  • code
  • atone
  • atone for (something)
References in periodicals archive
At the end of your time in Purgatory, you had completed the appropriate punishment for your sins, and ultimately could gain admission to Heaven.
Granted by bishops and the Pope, indulgences offered a reduction (either full or partial) of the amount of time you spent suffering in Purgatory in punishment for your sins, whether by one day or 10,000 years.
Having received God's forgiveness for your sin, you then did penance to account (partially at least) for your sin, facing punishment (pena).
Role of indulgences; YOUR LETTERS TO THE NATIONAL NEWSPAPER OF WALES