Do I need to pay taxes on my earnings or have a work permit?

As with all self-employed individuals residing in the UK or Ireland, cat sitters are responsible for complying with their local tax and regulatory framework that applies to self-employment.

If you wish to obtain first-hand and accurate information that relates to your query, we would recommend you check the official governmental website for all matters related to self-employment and taxation.

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Here are some useful links:

UK:

NOTE: In the UK any income below £1000 does not need to be declared as income.

https://www.gov.uk/government/publications/income-tax-new-tax-allowance-for-property-and-trading-income/income-tax-new-tax-allowance-for-property-and-trading-income

An overview page on being self employed which is an excellent introduction on what you need to do:

https://www.gov.uk/working-for-yourself/overview

For more in depth information there is an e-learning course that is extremely useful: http://www.hmrc.gov.uk/courses/SYOB3/syob_3/html/syob_3_menu.html

There are also webinars (online seminars) and YouTube videos that can be found here:

https://www.gov.uk/government/news/webinars-emails-and-videos-if-youre-self-employed

Ireland:

http://www.revenue.ie/en/tax/it/leaflets/it10.html