======Amortization of Prior Service Cost======
Amortization of Prior Service Cost is an accounting method used to gradually recognize the expense of retroactive benefits awarded to employees in a [[defined-benefit pension plan]]. Imagine a company decides to sweeten its pension deal, not just for the future, but for all the years its employees have //already// worked. This generous move instantly creates a large, new liability for the company, known as **prior service cost**. Instead of taking a massive one-time hit to its profits, accounting rules under both [[GAAP]] (Generally Accepted Accounting Principles) and [[IFRS]] (International Financial Reporting Standards) allow the company to spread this cost over the estimated remaining working lives of the employees who benefit. Think of it like a surprise bill that you're allowed to pay off in manageable installments rather than all at once. This process of spreading the cost is amortization.
===== How Does Prior Service Cost Arise? =====
Prior service cost typically pops up when a company amends its [[pension plan]]. This isn't something that happens out of the blue; it's often the result of specific business decisions.
  * **Union Negotiations:** A common trigger is a new contract negotiated with a labor union, where enhanced pension benefits are a key bargaining chip.
  * **Attracting Talent:** In a competitive market, a company might improve its pension formula to retain experienced staff or attract new top-tier talent.
  * **Plan Enhancements:** Management might simply decide to increase the benefit formula. For example, changing the pension payout from 1.25% of an employee's final salary for each year of service to 1.5%. This seemingly small change, when applied retroactively to a large workforce's entire history, can create a substantial financial obligation overnight.
This new obligation is initially recorded on the [[balance sheet]], not as an immediate expense, but within a component of equity called [[Accumulated Other Comprehensive Income]] (AOCI). It's a bit like tucking a future IOU away in a separate drawer.
===== The Investor's Angle: Peeking Behind the Curtain =====
For a value investor, understanding how prior service cost is handled is crucial. It’s a classic example of where reported earnings can differ from the underlying economic reality. The amortization is a **non-cash expense**, and savvy investors, like [[Warren Buffett]], always pay close attention to the difference between accounting profits and actual cash flow.
==== Impact on Financial Statements ====
  * **The Balance Sheet:** The initial prior service cost increases the company's total pension liability and reduces shareholder equity through AOCI. This makes the company's financial position look weaker, even before the expense hits the income statement.
  * **The Income Statement:** Each year, a portion of the prior service cost is "amortized"—moved from AOCI to the [[income statement]] as part of the total [[pension expense]]. This systematically reduces the company's reported [[net income]] over many years.
==== Red Flags for Value Investors ====
When analyzing a company with a significant pension plan, keep an eye out for these potential issues:
  * **A Ballooning Liability:** Prior service cost contributes to the total [[unfunded pension liability]]—the shortfall between what the company has saved in its pension fund and what it has promised to pay out. A large and growing liability is a form of hidden debt that can drain future cash flow.
  * **Aggressive Assumptions:** The amortization period depends on estimates of employees' remaining service years. If a company uses overly optimistic assumptions (e.g., assuming employees will work for longer than they actually do), it can understate the annual pension expense, making current profits look better than they are.
  * **Earnings Quality:** If a company's earnings are consistently dragged down by large, non-cash pension expenses like the amortization of prior service cost, its "quality of earnings" is lower. The real cash-generating power of its core operations might be masked by these legacy obligations. An investor should always ask: how much of the company's profits are real cash, and how much is just accounting fiction?