Prison sentence release date calculator

How it is calculated

• Conditional release (koşullu salıverilme). A convict in good conduct may be released conditionally after serving part of the sentence in an institution (Law 5275 art. 107/1). For a fixed term the fraction is generally one half, and two thirds for the offences listed in art. 107/2 (a)–(h), such as intentional killing, torture and ill-treatment and offences against privacy (art. 107/2). Organisation offences and a first repeat offence take two thirds (arts 107/4, 108/1); a second application of the repeat-offender rules takes three quarters (art. 108/3, as amended by Law 7550).
• TCK arts 102/2, 103, 104/2-3 and 188. For adults the fraction is three quarters (art. 108/9); for these offences committed before 28 June 2014 it is two thirds (provisional art. 9/4). Art. 108/9 does not apply to children: for them sexual offences and drug manufacture and supply take two thirds under art. 107/2 (e) and (g). The repeat-offender rules do not apply to a person under 18 at the offence (TCK art. 58/5).
• Life sentences. Aggravated life means 30 years and life 24 years in an institution (art. 107/2); organisation offences 36 and 30 (art. 107/4); repeat offences, offences against a child and the art. 108/9 offences 39 and 33 (arts 108/1, 108/8, 108/9). For several fixed-term sentences served together the time in an institution is at most 28 years, or 32 in the cases of arts 107/4, 108/1 and 108/9 (arts 107/3-e, 107/4-e, 108/1-c).
• Counting time. For prison sentences a month is thirty days, a year twelve months, and a part of a day is disregarded (TCK art. 61/6). The calculator turns the sentence into days on that basis, applies the fraction and adds the result to the start date by the calendar. Time in custody and pre-trial detention is deducted from the sentence (TCK art. 63); the calculator treats those days as already served by moving the start back by that many days.
• Supervised release (denetimli serbestlik). A convict in good conduct who is in an open institution or a children’s education home and has one year or less to conditional release may ask to serve that last part under supervision (art. 105/A/1). For offences committed up to and including 30 March 2020 the period is three years (provisional art. 6/1), except for intentional killing, torture and ill-treatment, offences against sexual inviolability and privacy, drug manufacture and supply, the offences in Chapters 4 to 7 of Part 4 of Book II of the Criminal Code (against the security of the state), terrorism-law offences and intentional injury of an ascendant, descendant, spouse, sibling or a person unable to defend themselves. For offences committed on or after 4 June 2025 at least one tenth of the time required until conditional release, and not fewer than five days, must also have been spent in an institution (last sentence of art. 105/A/1, added by Law 7550; provisional art. 11).
• Offences on or before 31 July 2023. Provisional art. 10/6 (as amended by Law 7571) provides supervised release three years earlier for the offences it does not exclude, on request and after at least three months in an open institution. The calculator reads “three years earlier” as three years added to the supervision period (for example 1 + 3 = 4 years) and shows that date on a separate line.
• Days a child spends in an institution. For offences up to 30 March 2020, a day spent in an institution before the 15th birthday counts as three days and a day before the 18th birthday as two (provisional art. 6/4). For later offences a day before the 15th birthday counts as two, except for killing and TCK arts 102, 103, 188 and 220 (art. 107/5, as amended by Law 7593).

What it leaves out

• The convict’s conduct. Conditional and supervised release need good conduct; disciplinary penalties and loss of good conduct are not calculated. The execution judge decides (art. 107/11). The conditions and date for transfer to an open institution are not calculated either, although supervised release requires being in one.
• Special regimes. Terrorism-law offences, offences in TCK arts 302–325 and cases where conditional release is excluded for aggravated life (art. 107/16; provisional art. 2). Judgments that combine sentences with different fractions, and several life sentences or a life sentence with a fixed term (art. 107/3), are also outside it.
• Other routes. Art. 105/A/3, provisional art. 6/2 and art. 110 for women with a child under seven, and for the seriously ill, disabled and elderly; Covid-19 leave (provisional arts 9 and 10/1–5); amnesty and suspension of sentences.
• Legal readings. The text of the law at the offence date is not compared with today’s (TCK art. 7/2–3): the calculator applies the text in force on 7 November 2026 and separates only the dates the statute itself fixes. Fractions of a day, month-end dates and whether detention days count towards the one-tenth stay may differ by a day or two from the enforcement office’s figure; the official date is in the enforcement certificate (müddetname).

Example

A nine-year fixed-term sentence for a general offence committed on 10 October 2023; the convict was born in 1990, was held in detention for 100 days and began serving on 15 March 2024. Half is 4 years 6 months, and the 100 days move the start to 6 December 2023. Conditional release is on 6 June 2028, 1,544 days after the start. Because the offence is after 30 March 2020, after 31 July 2023 and before 4 June 2025, provisional arts 6/1, 10/6 and 11 do not apply, and supervised release can begin one year earlier, on 6 June 2027.