An "application for payment" is a formal request made by a contractor or subcontractor to the employer or main contractor for payment for work done, materials on or off site, or services provided during a specific period. The application for payment is a crucial part of the payment process in construction projects and is often linked to the terms outlined in the construction contract.

Key features of an application for payment include:

1. Timing:
   Applications for payment are typically submitted at regular intervals, such as monthly or according to the schedule outlined in the contract. Each application covers the work performed and costs incurred during a specific period, often referred to as the "valuation period."
2. Content:
   The application for payment includes details of the work carried out, materials on site, or services provided during the valuation period. It may include a breakdown of costs, progress reports, and any other relevant information necessary for the employer or main contractor to assess the value of the work.
3. Valuation of Work:
   The valuation of work in the application for payment is based on the terms and conditions of the contract. This may involve assessing completed work, variations, or other factors that contribute to the overall value of the work carried out.
4. Certification:
   In some contracts, the application for payment requires certification by the contractor or subcontractor and, in some cases, by the employer or main contractor. Certification indicates that the information provided in the application is accurate and in accordance with the terms of the contract.
5. Final Date for Payment:
   The contract typically specifies the period within which the employer or main contractor must make payment in response to the application. This is known as the final date for payment, and it is governed by the terms of the contract.
6. Payment Notice and Pay Less Notice:
   Following the submission of the application for payment, the employer or main contractor may issue a payment notice specifying the amount they intend to pay. If they intend to pay less than the amount claimed, they must issue a pay less notice within the prescribed time.

The application for payment is an essential part of maintaining a transparent and orderly payment process in construction contracts. It allows both parties to track progress, assess costs, and ensure that payments are made in accordance with the agreed-upon terms and conditions.