it's
90 days not 4 months
https://www.gov.uk/living-in-cyprusRegistration & Social Insurance
When moving to Cyprus, it is important to visit the local immigration office to register and to apply for a residency permit (now often referred to as ‘the yellow slip’). Applicants will need to provide evidence of identity and address, and may sometimes be asked to confirm and prove their date of entry into Cyprus, as well as any medical insurance in place. Fees charged by lawyers or agents vary significantly, and applicants may well find the task simple enough to undertake without the assistance of such individuals of firms.
It is important to note that this application for residency may result in the obligation to pay a regular Social Insurance contribution, depending on the applicant’s circumstances.
Income TaxNew residents are only able to visit their local income tax office and fulfil their obligations in this regard once they have been through the steps outlined above.
An individual is considered resident in Cyprus for income tax purposes if they are present in Cyprus for a period exceeding 183 days in the tax year in question. If this condition is met, tax is imposed on income arising from sources within Cyprus and outside Cyprus.
Taxable Income (€)* Tax Rate (%)
0 - 19,500 0
19,501 - 28,000 = 20%
28,001 - 36,300 = 25%
36,301 - 60,000 = 30%
60,000+ = 35%
Defence TaxAll residents of Cyprus are subject to a special defence contribution on some sources of unearned income (such as dividends or bank interest). This ranges between 3 percent and 30 percent depending on the source and personal circumstances.
*These rates are correct at 4 November 2013. Many exemptions, deductions, carry-forward losses, tax credits (eg. for foreign tax paid) and allowances may be available and it is recommended that you fully investigate these and the use of any double taxation agreements (DTAs) prior to taking any action. There are many qualified accountants in Cyprus who are able to help with the completion of tax returns, and advise their clients on making the most of available allowances.
**For amounts exceeding €3420 per year, pensioners have the right to choose to be taxed under this mode of taxation or at normal rates. Choosing to include pensions under ‘normal rates/return’ will result in pensions being added to other income.