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Retainage

Retainage is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Retainage rather than just read about it. In short: Retainage is a portion of the agreed upon contract price deliberately withheld until the work is complete to assure that the contractor or subcontractor will satisfy its obligations and complete a construction project. A retention is money withheld by one party in a contract to act as security against incomplete or defective works.

Key takeaways

  • Retainage belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Retainage to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Retainage from memory before moving on to harder problems.

Reference excerpt

Retainage is a portion of the agreed upon contract price deliberately withheld until the work is complete to assure that the contractor or subcontractor will satisfy its obligations and complete a construction project. A retention is money withheld by one party in a contract to act as security against incomplete or defective works. They have their origin in the Railway Mania of the 1840s but are now common across the industry, featuring in the majority of construction contracts. A typical retention rate is 5% of which half is released at completion and half at the end of the defects liability period (often 12 months later). There has been criticism of the practice for leading to uncertainty on payment dates, increasing tensions between parties and putting monies at risk in cases of insolvency. There have been several proposals to replace the practice with alternative systems.

History and purpose The practice of retainage dates back to the construction of the United Kingdom railway system in the 1840s. The size of the railway project increased demand for contractors, which led to the entrance of new contractors into the labor market. These new contractors were inexperienced, unqualified and unable to successfully complete the project. Consequently, the railway companies began to withhold as much as 20% of contractors' payments to ensure performance and offset completion costs should the contractor default. The point was to withhold the contractor's profit only, not to make the contractor and its subcontractors finance the project. Given the often large-scale, complexity, cost and length of construction projects, the risk of something not going according to plan is almost certain. Accordingly, a common approach that contracting parties take in order to mitigate this risk is to include retainage provisions within their agreements. The concept of retainage is unique to the construction industry and attempts to do two things: provide an incentive to the contractor or subcontractor to complete the project and protect the owner against any liens, claims or defaults, which may surface as the project nears completion. Incidentally, owners and contractors use retainage as a source of financing for the project, contractors in turn withhold retainage from subcontractors, frequently at a greater percentage than is being withheld from them.

United Kingdom Retentions are widely used in the British construction industry: in the majority of all contracts awarded, a sum of money is withheld as a security against poor quality products (defects) or works left incomplete. Clients withhold retention against main contractors and main contractors withhold payment against sub-contractors. Retentions typically take the form of a percentage on the contract value. The rate can vary wildly but is typically around 5%. The general state of the economy can affect the rates set: in a buoyant economy with plentiful work sub-contractors are able to pick which work they accept and therefore have potential to negotiate more favourable rates. The chain of retention starts with the client who withholds money on the main contractor. The main contractor withholds money on sub-contractors who may also then withhold on sub-sub contractors. The retention money is typically released in two portions (known as moieties); the first being payable at completion of a project and the second at the end of the defects liability period. This period is the time during which the client is able to identify works that are defective to the contractor who must then remedy them; it is often twelve months. The use of retentions is not common to all sectors of the industry; for example lift installers have developed their own guarantee system instead. A mobilization payment is an advance payment to a contractor at the start of a project to assist in the beginning of operations.

Impact The use of retentions is intended to encourage efficiency and productivity. The contractor has a financial incentive to achieve completion as early as possible (to release the first moiety payment) and to minimise defects in the works (to achieve the second payment). Retentions held against sub-contractors are also a key source of cash for main contractors, who may use them to finance new projects. However sub-contractors often complain about the system. They sometimes lack a firm date on which retention monies will be paid and a 2017 British government report noted that more than half of contractors had experienced late or non-payment of retention monies. Delays are reportedly longer for sub-contractors and sub-sub contractors than for the main contractor. This restricts cash flow available for the company as a going concern and for capital investment. The chasing up of payments is also resource intensive, as such smaller businesses are hit more severely than larger ones. Some smaller companies simply write off the retention money, increasing their prices to compensate. The practice has also been described as increasing tensions between the parties in contract. There is no current requirement for retention monies to be ring-fenced (kept separately to general company funds and preserved from spending) and they are usually held in a client's or contractor's main bank account. This can cause problems in cases of insolvency, where the money can be lost and payments owed to the supply chain put at risk. The use of retentions (which are considered a form of stage payments) can also render construction companies unsuitable for factoring (the sale of accounts receivable).

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Retainage

Start with the simplest possible case. Write down what Retainage claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Retainage before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Retainage ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Retainage

In research
Retainage appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Retainage in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Retainage is common in secondary-school and first-year university syllabi. It links to neighbouring topics Construction, Contract law, so understanding it makes those chapters shorter.
In everyday life
Look for Retainage outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Retainage in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Retainage means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Retainage out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Retainage in simple terms?

Retainage is a portion of the agreed upon contract price deliberately withheld until the work is complete to assure that the contractor or subcontractor will satisfy its obligations and complete a construction project. A retention is money withheld by one party in a contract to act as security agai…

Why does Retainage matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Retainage?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Retainage.

Tags

  • Construction
  • Contract law

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