Performance Management · Life-cycle costing

Benefits, Limitations and Cost Control Using Life Cycle Costing

Updated 11 October 2026 · Fact-checked

Life cycle costing tracks all costs of a product from design to disposal. Most costs are committed at design, long before they are spent. So managers can control cost best early on. Benefits include better pricing and decisions. Limitations include forecasting error, data effort and uncertain product life.

Understand Benefits, Limitations and Cost Control Using Life Cycle Costing

Life cycle costing (LCC) estimates and accumulates all costs of a product over its whole life. That covers design, development, production, marketing, distribution, customer service and end-of-life costs. Traditional reports often only look at costs in the current period and ignore pre-production costs.

The key idea is the difference between costs committed and costs incurred. Costs are *incurred* when cash is spent or the cost is recorded. Costs are *committed* (or locked in) when a decision fixes them. Design choices on materials, components, features, tolerances and production method fix most of the later cost. This is often described as most of the life cost being committed at the design stage, while only a small part has been spent by then.

This matters for control. If you wait until production to cut cost, you can only change a small part of it. Changes at design cost little and save a lot. Changes later need redesign, retooling and delays. So LCC pushes attention to the early stages, and works well with target costing.

LCC also supports decisions and pricing. It shows whether a product can recover its full life costs, including large upfront costs such as research and development. It helps set prices and decide whether to launch, continue or drop a product. It also helps compare options such as buying a machine with a cheap price but high running costs against a dearer, cheaper-to-run one.

But LCC relies on forecasts. Product life, volumes, future costs and disposal costs are uncertain. It can be costly to collect the data, and it may not fit short-lived products or firms with poor cost records.

Key rules to remember

Total life cycle cost: Total life cycle cost = pre-production costs + production costs + distribution and marketing costs + after-sales and service costs + end-of-life costs; Add all costs over the whole life. Include only the cost categories that apply to the product in the question.
Life cycle cost per unit: Life cycle cost per unit = total life cycle cost ÷ total units over the life; Use total units across the whole life, not one year's volume.
Percentage of cost committed: Committed % at a stage = cumulative cost committed ÷ total life cost × 100; Compare with the percentage actually incurred at that stage. Committed is usually far higher than incurred early on.
Life cycle profit check: Life cycle profit = total life revenue − total life cycle cost; Positive means the product recovers its full cost over its life. Consider discounting if the question asks for it.

How to solve Benefits, Limitations and Cost Control Using Life Cycle Costing questions

Use this method for numerical and written LCC questions on benefits, limitations and cost control.

1Read the requirement and note whether it asks for a calculation, a discussion or both.
2List the life cycle stages in the scenario and the costs in each stage. Do not omit early or end-of-life costs.
3If numbers are given, add the costs and divide by total life units to get cost per unit. Compare with the price or target.
4For committed vs incurred, work out each stage's share of total cost for both measures. Show the gap at the design stage.
5Link the gap to action: design changes, value engineering, supplier input and early cost reviews.
6For benefits and limitations, tie each point to the scenario, such as long life, high development cost or uncertain volumes.
7Give a short conclusion: what the figures show and what management should do.

Quickest way: Three-part check for LCC questions

When to use it: Use this for objective test questions and for planning a Section C answer under time pressure.

Total all costs across all stages, then divide by total units for the unit figure.
Ask where the cost is committed. Early design choices lock in most of it, so action early gives most saving.
Write one benefit and one limitation tied to the case. For example: full cost visibility, but forecast uncertainty.

Common mistakes in Benefits, Limitations and Cost Control Using Life Cycle Costing

Treating committed costs and incurred costs as the same thing.
Both words sound like spending.
Fix: Committed means fixed by a decision. Incurred means actually spent. Costs are committed early and incurred later.
Leaving out pre-production or end-of-life costs when calculating life cost.
Students focus on production costs that appear in normal reports.
Fix: Go through every stage in the question and tick each cost off before adding.
Dividing total life cost by one year's units.
Rushing and using the first volume figure seen.
Fix: Add the units for all years of the life first.
Listing generic limitations with no link to the scenario.
Students memorise a list and repeat it.
Fix: Pick limitations that fit the case, such as uncertain product life or poor cost data, and explain why.
Saying LCC cuts costs by itself.
Confusing information with action.
Fix: Say LCC highlights where costs are locked in, so managers can act on design, supplier and process choices.

Worked examples

Example 1

A product has a life of 4 years. Costs: design and development ₹8,00,000; production ₹12,00,000 in total; marketing and distribution ₹4,00,000 in total; after-sales support ₹3,00,000 in total; disposal ₹1,00,000. Total units over the life are 50,000. The selling price is ₹60 per unit. Calculate the life cycle cost per unit and the life cycle profit.

Show the solution

Total life cycle cost = 8,00,000 + 12,00,000 + 4,00,000 + 3,00,000 + 1,00,000 = ₹28,00,000.
Cost per unit = 28,00,000 ÷ 50,000 = ₹56.
Total revenue = 50,000 × ₹60 = ₹30,00,000.
Life cycle profit = 30,00,000 − 28,00,000 = ₹2,00,000.
Comment: the price covers the full cost, but the margin is only ₹4 per unit, so a small rise in cost or fall in volume could remove it.

Answer: Life cycle cost per unit is ₹56 and life cycle profit is ₹2,00,000. The product recovers its full life cost, but with a thin margin.

Example 2

At the end of the design stage, 70% of a product's total life cost has been committed, but only 10% has been incurred. Total life cost is ₹50,00,000. Calculate the amounts committed and incurred, and explain what this means for cost control.

Show the solution

Committed = 70% × 50,00,000 = ₹35,00,000.
Incurred = 10% × 50,00,000 = ₹5,00,000.
Committed but not yet spent = 35,00,000 − 5,00,000 = ₹30,00,000.
Meaning: ₹30,00,000 of future spending is already fixed by design choices, even though it has not yet been spent.
Control: the remaining uncommitted cost is ₹15,00,000 (50,00,000 − 35,00,000), so later action has little scope.
Action: review design options, simplify components, involve suppliers and production staff, and set cost targets before the design is finalised.

Answer: ₹35,00,000 is committed and ₹5,00,000 incurred, so ₹30,00,000 of future cost is already locked in. Cost control effort should focus on the design stage, where changes are cheapest and have most effect.

Exam tips

Always define committed and incurred in one line each before you use them. Examiners reward the distinction.
For Section C discussion, give a benefit or limitation, then a reason, then a link to the scenario. Three short sentences per point is enough.
In calculations, show a stage-by-stage cost list so you can pick up method marks even if you miss a figure.
Objective test questions are all or nothing, so check whether the question asks for total cost or cost per unit before choosing an option.
Link LCC to target costing when asked about design-stage control. Both aim to manage cost before production.

Practice questions from Life-cycle costing

Benefits, Limitations and Cost Control Using Life Cycle Costing in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Benefits, Limitations and Cost Control Using Life Cycle Costing: frequently asked questions

What are the main benefits of life cycle costing?

It shows the full cost of a product, including costs before and after production. It helps with pricing, launch and drop decisions, and supports cost control at the design stage. It can also help compare asset or product options on whole-life cost.

What are the limitations of life cycle costing?

It depends on forecasts of volumes, costs and product life, which may be wrong. Collecting data across all stages can be costly. It may be less useful for short-lived products, and it does not act on its own: managers still have to use the information.

What is the difference between costs committed and costs incurred?

Costs incurred are those actually spent or recorded. Costs committed are those already fixed by earlier decisions, even if not yet spent. At the design stage, committed costs are usually much higher than incurred costs.

How does life cycle costing help control cost at the design stage?

Design decisions fix much of the later cost. LCC makes this visible so managers can compare design options, simplify products and set cost targets early. Changes made then cost far less than changes made in production.