According to the book "A Historical And Economic Geography Of Ottoman Greece: The Southwestern Morea in the 18th Century" by Fariba Zarinebaf, John Bennet and Jack L. Davis:

To finance its war efforts, the Ottoman state relied heavily on revenues from the cizye (poll tax) collected directly by the central treasury. Therefore, it generally did not support forced conversion of the non-Muslim reaya. The social pressure to convert must have been considerable, however, in areas where the majority of the population was Muslim. Furthermore, an increase in the amount of the cizye must also have indirectly encouraged conversion in the second half of the 16th century. An imperial order issued to the kadi of the districts of Manafge and Modon on 19 Zilkade 978/March 1570 stated that there were illegal attempts by taxfarmers to collect cizye from converts who were timar-holders and who had been serving in the Ottoman army for fifteen years. From this report it is clear that local Christians converted to Islam to enter the ranks of the military to avoid the payment of taxes. But it is also obvious that tax collectors and tax-farmers resented the tax-exempt privileges of the converts

Glossary:

cizye - Islamic poll tax imposed on a non-Muslim household

reaya - productive groups (peasants, merchants, artisans) subject to taxes, in contrast to askeri (q.v.) (military), who were tax-exempt

kadi - Muslim judge

Zilkade - Dhu al-Qi'dah, the eleventh month in the Islamic calendar. It is one of the four sacred months in Islam during which warfare is prohibited, hence the name ‘Master of Truce’.

timar - prebend in the form of state taxes in return for regular military service, conventionally less than 20,000 akçes (q.v.) in value