The Burden of Proof: Who Has to Prove What?

The burden of proof determines who is responsible for proving a disputed fact, allegation or charge in court.

It is one of the most important principles in court proceedings because making an allegation is not the same as proving it.

In criminal cases, the prosecution generally has to prove guilt beyond reasonable doubt. In civil proceedings, disputed facts are generally decided using the lower standard known as the balance of probabilities.

But who carries the burden, can it ever shift, and what actually counts as enough proof?

What Is the Burden of Proof?

The burden of proof answers a simple question: Who has to prove it?

It should not be confused with the standard of proof, which answers a different question: How convincingly must it be proved?

For example, a party might carry the burden of proving a particular fact, while the applicable standard determines how strong the evidence must be before the court accepts that fact.

The precise rules depend on the type of proceeding, the issue being decided and the jurisdiction.

Who Has the Burden of Proof in a Criminal Case?

In criminal proceedings, the prosecution generally carries the burden of proving the essential elements of the crime.

The accused does not ordinarily have to prove their innocence.

This is closely connected with the presumption of innocence, a fundamental principle of criminal justice.

In England and Wales, Article 6 of the European Convention on Human Rights, given effect domestically through the Human Rights Act 1998, provides that a person charged with a crime is presumed innocent until proved guilty according to law.

What Does Beyond Reasonable Doubt Mean?

The normal criminal standard is proof beyond reasonable doubt.

This is a high standard, but it does not require absolute or mathematical certainty.

The prosecution must present sufficient evidence to satisfy the court or jury of guilt to the required criminal standard.

If a reasonable doubt remains about an essential element of a crime, the accused should not be convicted of that crime.

Simple Example

Imagine someone is prosecuted for stealing a valuable watch.

It is not enough for the prosecution simply to say: "This person stole the watch."

Evidence must establish the elements of the crime to the required criminal standard.

An accusation begins the allegation. It does not prove it.

Generally, a party asserting a fact necessary to establish its case will need to prove that fact.

Criminal vs Civil Standard of Proof

Criminal — Beyond reasonable doubt — A high level of certainty is required before conviction

Civil — Balance of probabilities — More likely than not

In the United States, the broadly comparable ordinary civil standard is commonly called the preponderance of the evidence.

Different proceedings can use different standards, so the applicable jurisdiction and type of case always matter.

Allegation vs Evidence

One of the most important distinctions to understand is: An allegation is not automatically proof.

Courts examine evidence, which can include witness testimony, documents and records, photographs and video, electronic communications, financial records, expert evidence, physical evidence, and circumstantial evidence.

The court then considers whether the evidence satisfies the required standard.

Simply repeating an allegation does not automatically make it established fact.

Direct and Circumstantial Evidence

Evidence does not always require somebody to have directly witnessed an event.

Direct evidence might involve a witness describing something they personally saw or heard.

Circumstantial evidence involves facts from which another fact can reasonably be inferred.

A case can therefore sometimes be established substantially, or even entirely, through circumstantial evidence.

The important question is whether the evidence as a whole satisfies the applicable standard of proof.

Why Does the Burden of Proof Matter?

The burden of proof provides structure to the way courts determine disputed facts.

Instead of simply asking who makes the strongest accusation, the court must consider: What needs to be proved? Who has to prove it? What evidence supports it? Has the required standard been reached?

In criminal proceedings, these principles are particularly important because a conviction can lead to serious consequences, including loss of liberty.

The Bigger Lawful Principle

The burden of proof reflects a fundamental principle: An assertion should be tested against evidence before it is accepted as an established fact.

Understanding the difference between an allegation and proof helps explain how courts assess criminal accusations and civil disputes.

Final Thoughts

The distinction is simple: Burden of proof = who must prove it. Standard of proof = how convincingly it must be proved.

In criminal proceedings, the prosecution ordinarily carries the burden of establishing guilt beyond reasonable doubt.

In civil proceedings, disputed facts are ordinarily determined on the balance of probabilities, although the precise burden and standard depend upon the particular proceeding and jurisdiction.

The central lesson is worth remembering: Making an allegation is one thing. Proving it is another.

A traditional Latin maxim associated with the burden of proof is "Ei incumbit probatio qui dicit, non qui negat," meaning "the burden of proof lies upon the one who asserts, not the one who denies." In simple terms, a person making an assertion generally bears the responsibility of proving it, rather than requiring another person simply to disprove the claim.