What Is a Clerk of Scales in Horse Racing?

Last updated July 29, 2026 🗓️ Book a Free Coaching Session
Horse and jockey weigh-in representing the topic of a clerk of scales in horse racing

Key points

  • The Clerk of Scales verifies each jockey’s weight before and after a race.
  • The official records the weight the horse must carry under the race conditions.
  • Weighing out happens before the race, while weighing in happens after it.
  • The Clerk of Scales checks permitted equipment and, where required, jockey colors and numbers.
  • The official reports weight differences or other issues to the stewards.
  • Rules, weight allowances, equipment limits, and penalties vary by racing jurisdiction.

What is a Clerk of Scales in horse racing?

A Clerk of Scales is the race official who weighs jockeys and their permitted equipment before and after a race. This official confirms that each horse carries the correct weight under the race conditions.

The Clerk of Scales works in or near the weighing room. The role helps racing officials check jockey weight, record changes, and report problems. These checks support fair competition because carried weight can affect a horse’s performance.

What does a Clerk of Scales do?

The role of the Clerk of Scales covers several steps before and after each race. The exact process can differ between racing jurisdictions, but the main duties usually include:

  • Weighing each jockey before the race
  • Confirming the weight assigned to the horse
  • Checking permitted riding equipment
  • Recording the official weight
  • Weighing the jockey again after the race
  • Reporting significant discrepancies to the stewards or another designated official

The official may also check details connected to the jockey’s identity, racing colors, saddlecloth number, or other race-day requirements. These checks depend on the rules at the track or racing authority.

What does weighing out mean?

Weighing out is the process that takes place before a race. Each jockey reports to the weighing room and steps onto the official scale with the equipment that counts toward the horse’s carried weight.

The Clerk of Scales compares the result with the weight assigned in the race conditions. The official then records the weight for the race.

A jockey may need to carry extra lead or another approved weight if the jockey and equipment weigh less than the assigned amount. The clerk confirms that the total meets the required weight before the jockey goes to the paddock or starting area.

The equipment included in the weighing process can vary. It may include items such as:

  • The jockey’s riding clothes
  • Boots
  • Saddle
  • Saddlecloth
  • Girth
  • Lead weights
  • Other equipment listed in the local rules

The racing authority decides which items count toward the horse’s weight. A jockey’s helmet and safety vest may receive different treatment depending on the jurisdiction.

What does weighing in mean?

Weighing in takes place after the race. The jockey returns to the weighing room with the equipment that the rules require for the post-race check.

The Clerk of Scales weighs the jockey and equipment again. This result allows officials to compare the post-race weight with the recorded weight from before the race.

A small change can occur during a race. For example, a jockey may lose weight through sweating. Equipment can also become wet or damaged. Racing rules set the limits for acceptable differences and explain what happens when the difference exceeds those limits.

The Clerk of Scales does not decide every penalty. The official reports the issue to the stewards or another designated authority. Those officials then review the circumstances and apply the relevant rule.

How do assigned weight and weight allowances work?

Assigned weight is the amount that the race conditions require a horse to carry. The conditions may set different weights based on factors such as:

  • The horse’s age
  • The horse’s sex
  • Previous wins
  • Race class
  • Handicap rating
  • Jockey claims or allowances

A weight allowance reduces the amount that a horse must carry. A lighter-weight allowance may apply to an apprentice jockey or another rider who qualifies under the local rules.

For example, a race may assign a horse 120 pounds. A qualifying jockey may claim a five-pound allowance. The horse may then carry 115 pounds, subject to the race conditions and the jurisdiction’s rules.

The Clerk of Scales verifies the final amount. The official does not set the race’s original weights. Instead, the clerk confirms that the jockey and equipment match the amount required after all allowances and adjustments.

Why does the Clerk of Scales matter?

Weight can influence how a horse performs. A heavier load can affect speed, stamina, and how a horse handles a particular distance or surface.

The Clerk of Scales helps ensure that every horse carries the weight listed in the official race conditions. That process protects the fairness of the race and gives bettors more confidence in the published information.

The post-race check also protects against unauthorized changes. If a jockey weighs significantly less after the race, officials may need to investigate. The result could affect the official outcome, a ruling, or a penalty, depending on the rules.

For handicappers, verified weight information can help explain differences between horses. A bettor may compare the assigned weight in one race with the weight a horse carried in previous starts. The comparison can add context to a horse’s past performance, especially when the horse moves into a different class or competes at a new distance.

Weight should remain one part of the analysis. Track condition, pace, field strength, jockey skill, trainer form, and the horse’s recent races can also affect the result.

Clerk of Scales vs. stewards

The Clerk of Scales and the stewards have different jobs.

The Clerk of Scales manages the weighing process and records the relevant information. The official reports discrepancies, equipment concerns, or other issues that arise during the process.

The stewards oversee the race and enforce the rules. They review reports from the Clerk of Scales and other officials. They may decide whether a jockey, horse, or connection faces a penalty or whether an issue affects the official result.

In simple terms, the Clerk of Scales checks the weight. The stewards decide what action to take when a problem occurs.

Do the rules vary between racing jurisdictions?

Yes. Racing authorities can set different rules for:

  • Which equipment counts toward carried weight
  • How much weight a jockey may claim
  • The permitted weight difference after a race
  • When officials must report a discrepancy
  • The penalties for a weight violation
  • Whether colors, numbers, or other details form part of the weighing-room check

A race track may also use terms or procedures that differ from those used in another country. Bettors should check the rules published by the relevant racing authority when a weight issue affects a result.

Glossary takeaway

A Clerk of Scales is the official responsible for jockey weight verification before and after a horse race. The clerk weighs out each jockey before the race, weighs in the jockey afterward, checks permitted equipment, and reports discrepancies to the stewards.

For bettors and handicappers, the term matters because the Clerk of Scales helps confirm the weight listed in the official race conditions. That record gives you a reliable starting point when you compare carried weight across a horse’s races.