Conviction rate

The conviction rate, expressed as a percentage, represents the proportion of cases resulting in a legal declaration of guilt for an offense, against the total number of trials completed. It is calculated by dividing the number of convictions by the total number of adjudicated cases and then multiplying by 100. A conviction is a legal declaration that someone is guilty of committing an offense, determined through a jury's or bench's verdict within a court of law.

Conviction rates reflect many aspects of the legal processes and systems at work within the jurisdiction, and are a source of both jurisdictional pride and broad controversy. Rates are often high, especially when presented in their most general form (i.e., without qualification regarding changes made to original charges, pleas that are negotiated, etc.). Rates across jurisdictions within countries can vary by tens of percentage points (e.g., across states within the U.S.). In other cases, they are uniformly high, although for distinct reasons (e.g., in China and Russia).

Introduction
The conviction rate of a prosecutor or government can be defined as the number of convictions divided by the number of criminal cases brought.

Canada
In Canada, 2017–2018 data provided by Statistics Canada indicate an overall rate of conviction of 62% (of those charged in adult court). This is much lower than one might infer from the 3.6% acquittal rate because 1/3rd of the cases are withdrawn (either directly or indirectly via a "Crown Stay") before they reach a verdict. According to Canadian trial lawyer Kim Schofield, the effective conviction rate falls from 62% to approximately 50% if one excludes guilty pleas and deals.

China
In China, the justice system has a conviction rate of 99.9% in 2014. Out of 1.2 million tried, only 1,039 were found not guilty - an acquittal rate of around 0.08%. Several local protectorates in China have set a "zero acquittal policy," resulting in a negative performance evaluation for trials that end in acquittal. As a result, Chinese prosecutors tend to withdraw indictments at the pre-trial stage rather than risk acquittal.

India
The national conviction rate in India for offences of the Indian Penal Code is 57.0% in 2021, a statistic that varies state by state; the state with the highest conviction rate is Mizoram (96.7%), while the state with lowest rate is Assam (5.6%) in 2021. In 2022, the conviction rate of the Central Bureau of Investigation (CBI) stood at 74.59%. In 2023, the National Investigation Agency (NIA) had a conviction rate of 94.70%. From 2014 to 2023, the Enforcement Directorate (ED) achieved a conviction rate of 93.54%, securing convictions in 29 out of 31 cases that completed trial.

Israel
The conviction rate in Israel is around 93%. Around 72% of trials end with a conviction on some charges and acquittal on others, while around 22% end with a conviction on all charges. These statistics do not include plea bargains and cases where the charges are withdrawn, which make up the vast majority of criminal cases.

Japan
The conviction rate is 99.3%. By only stating this high conviction rate it is often misunderstood as too high—however, this high conviction rate drops significantly when accounting for the fact that Japanese prosecutors drop roughly half the cases they are given. If measured in the same way, the United States' federal conviction rate would be 99.8%.

In Japan, unlike in some other democracies, arrests require permission of judges except for cases such as arresting someone while committing a crime. Only significant cases with sufficient evidence are subject to indictment, since becoming a party to a criminal trial imposes a burden on a suspect; Japan's indictment ratio is only 37%—“99.3%” is the percentage of convictions divided by the number of indictments, not the criminals. As such, the conviction rate is high.

Russia
In 2018, the gross conviction rate in Russia was above 99%. In 2018, 0.25% of court cases ended in acquittal, compared with 0.3% in 2017 and 0.54% in 2014. Jury trials, where not guilty verdicts are more common, are rare. However this statistic does not take into account the 22–25% of cases that get dismissed prematurely. Instead, the Russian statistics consider the number of convictions out of the cases that have made it to the end, not being dismissed in the process. This is unlike other countries, where all non-convictions (like dismisses and acquittals) are combined into one statistic.

United Kingdom
The United Kingdom of Great Britain and Northern Ireland has three prosecuting bodies that cover different geographic areas. The Crown Office and Procurator Fiscal Service for Scotland. In Northern Ireland Public Prosecution Service for Northern Ireland (PPSNI) and in England and Wales most prosecutions are brought by the Crown Prosecution Service (CPS). The figures for 2017–2018 in England and Wales show at Crown Court the conviction rate was 80.0% and at Magistrates Court the conviction rate was 84.8%. In Northern Ireland figures show at Crown Court the conviction rate for 2017–2018 was 87.2% and at Magistrates Court it was 79.0%.

United States
In the United States federal court system, the conviction rate rose from approximately 75 percent to approximately 85% between 1972 and 1992. For 2012, the US Department of Justice reported a 93% conviction rate. In 2000, the conviction rate was also high in U.S. state courts. Coughlan, writing in 2000, stated, "In recent years, the conviction rate has averaged approximately 84% in Texas, 82% in California, 72% in New York, 67% in North Carolina, and 59% in Florida."

In 2018, the Bureau of Justice Statistics reported that among defendants charged with a felony, 68% were convicted (59% of a felony and the remainder of a misdemeanor) with felony conviction rates highest for defendants originally charged with motor vehicle theft (74%), driving-related offenses (73%), murder (70%), burglary (69%), and drug trafficking (67%); and lowest for defendants originally charged with assault (45%).

There are frequent "guilty acceptance" plea deals in the United States. That said, the ostensible "conviction rate" may not be accurate because the charges are dropped.