Civil law and Criminal law are two broad and separate entities of law with separate sets of laws and punishments.

According to William Geldart, Introduction to English Law 146 (D.C.M. Yardley ed., 9th ed. 1984),

"The difference between civil law and criminal law turns on the difference between two different objects which law seeks to pursue - redress or punishment. The object of civil law is the redress of wrongs by compelling compensation or restitution: the wrongdoer is not punished; he only suffers so much harm as is necessary to make good the wrong he has done. The person who has suffered gets a definite benefit from the law, or at least he avoids a loss. On the other hand, in the case of crimes, the main object of the law is to punish the wrongdoer; to give him and others a strong inducement not to commit same or similar crimes, to reform him if possible and perhaps to satisfy the public sense that wrongdoing ought to meet with retribution.”

Examples of criminal law include cases of burglary, assault, battery and cases of murder. Examples where civil law applies include cases of negligence or malpractice.

	Civil Law	Criminal Law
Definition	Civil law deals with the disputes between individuals, organizations, or between the two, in which compensation is awarded to the victim.	Criminal law is the body of law that deals with crime and the legal punishment of criminal offenses.
Purpose	To deal with the disputes between individuals, organizations, or between the two, in which compensation is awarded to the victim.	To maintain the stability of the state and society by punishing offenders and deterring them and others from offending.
Case filed by	Private party	Government
Decision	Defendant can be found liable or not liable, the judge decides this.	Defendant is convicted if guilty and acquitted if not guilty, the jury decide this.
Standard of proof	"Preponderance of evidence." Claimant must produce evidence beyond the balance of probabilities.	"Beyond a reasonable doubt":
Burden of proof	Claimant must give proof however, the burden may shift to the defendant in situations of Res Ipsa Loquitur (The thing speaks for itself).	"Innocent until proven guilty": The prosecution must prove defendant guilty.
Type of punishment	Compensation (usually financial) for injuries or damages, or an injunction in nuisance.	A guilty defendant is subject to Custodial (imprisonment) or Non-custodial punishment (fines or community service). In exceptional cases, the death penalty.
Examples	Landlord/tenant disputes, divorce proceedings, child custody proceedings, property disputes, personal injury, etc.	Theft, assault, robbery, trafficking in controlled substances, murder, etc.
Appeals	Either party (claimant or defendant) can appeal a court's decision.	Only the defendant may appeal a court's verdict. The prosecution is not allowed to appeal.
Jury opinion	In cases of civil law, the opinion of the jury may not have to be unanimous. Laws vary by state and country.	In the criminal justice system, the jury must agree unanimously before a defendant is convicted.
Commencement of proceedings	State/People/Prosecution by summons or indictment	By way of pleadings, Representatives of the state, Prosecutor, Attorney General.

Cases

In civil law, a case commences when a complaint is filed by a party, which may be an individual, an organization, a company or a corporation, against another party. The party complaining is called the plaintiff and the party responding is called the defendant and the process is called litigation. In civil litigation, the plaintiff is asking the court to order the defendant to remedy a wrong, often in the form of monetary compensation to the plaintiff. In contrast, in criminal law, the case is filed by the government, usually referred to as the State and represented by a prosecutor, against a defendant. An individual can never file criminal charges against another person: an individual may report a crime, but only the government can file criminal charges in court. Crimes are activities punishable by the government and are divided into two broad classes of seriousness: felonies having a possible sentence of more than one year incarceration and misdemeanors having a possible sentence of one year or less incarceration.

Punishment

One of the notable differences between civil law and criminal law is the punishment. In case of criminal law a person found guilty is punished by incarceration in a prison, a fine, or in some occasions death penalty. Whereas, in case of civil law the losing party has to reimburse the plaintiff, the amount of loss which is determined by the judge and is called punitive damage. A criminal litigation is more serious than civil litigation, so the criminal defendants have more rights and protections than a civil defendant.

Burdens of proof

In case of criminal law, the burden of proof lies with the government in order to prove that the defendant is guilty. On the other hand, in case of civil law the burden of proof first lies with the plaintiff and then with the defendant to refute the evidence provided by the plaintiffs. In case of civil litigation if the judge or jury believes that more than 50% of the evidence favors the plaintiffs, then plaintiffs win, which is very low as compared to 99% proof for criminal law. In case of criminal law, defendant is not declared guilty unless approximately more than 99% proof is against him.

How the system works

One can say that criminal law deals with looking after public interests. It involves punishing and rehabilitating offenders, and protecting the society. The police and prosecutor are hired by the government to put the criminal law into effect. Public funds are used to pay for these services. If suppose you are the victim of the crime, you report it to the police and then it is their duty to investigate the matter and find the suspect . In most cases, if a charge has been properly presented and if there is evidence supporting it, the Government, not the person who complains of the incident, prosecutes it in the courts. This is called a system of public prosecutions. On the other hand, civil law is about private disputes between individuals or between an individual and an organization or between organizations. Civil law deals with the harm, loss, or injury to one party or the other. A defendant in a civil case is found liable or not liable for damages, while in a criminal case defendant may be found guilty or not.