Capital maintenance defines the financial or operating-capacity benchmark that must be preserved before an increase is treated as profit.
Capital maintenance is the principle that a company earns profit only after preserving a defined amount of capital, excluding contributions from and distributions to owners. The result depends on what “capital” means: nominal net assets, purchasing-power-adjusted net assets, physical productive capacity, or a separate legal or regulatory floor.
The IFRS Conceptual Framework describes financial capital as net assets or equity and physical capital as productive capacity. It links capital maintenance to profit measurement: only the amount above the capital required to be maintained is a return on capital rather than a return of capital.
The framework distinguishes two main concepts:
| Concept | Capital benchmark | Profit arises when |
|---|---|---|
| Financial capital maintenance | Financial amount of net assets | Adjusted closing net assets exceed opening net assets |
| Physical capital maintenance | Productive capacity or resources needed for that capacity | Adjusted closing operating capability exceeds opening capability |
Selection of a concept does not authorize an entity to ignore an accounting standard that applies to a transaction.
For a simplified period in consistent monetary units:
where:
Equivalently, add distributions back to closing capital and remove contributions before comparing with opening capital. Under a constant-purchasing-power model, opening capital and owner transactions also need measurement in comparable end-of-period units.
Assume a company begins with net assets of $1,000,000. During the year, owners contribute $150,000 and receive a $50,000 dividend. Closing net assets are $1,280,000.
| Item | Amount |
|---|---|
| Closing net assets | $1,280,000 |
| Less owner contribution | ($150,000) |
| Add owner distribution | $50,000 |
| Adjusted closing capital | $1,180,000 |
| Less opening capital | ($1,000,000) |
| Nominal financial profit | $180,000 |
The $150,000 contribution increased net assets but was not profit. The $50,000 dividend reduced closing net assets but was a distribution of capital or profit to owners, not an operating expense.
Suppose opening net assets are $1 million, closing net assets are $1.12 million, there are no owner transactions, and the general price level rises 8%.
| Measure | Capital benchmark at year-end | Profit above benchmark |
|---|---|---|
| Nominal financial capital | $1,000,000 | $120,000 |
| Constant-purchasing-power financial capital | $1,080,000 | $40,000 |
Both calculations can be internally correct because they preserve different financial benchmarks. Neither calculation alone measures liquidity, market value, or legally distributable profits.
Physical Capital Maintenance asks whether the entity has preserved its productive operating capability. Changes in prices of assets needed to maintain that capacity are treated differently from ordinary profit under the concept.
This is not simply a count of machines. Capacity can depend on technology, product mix, labor, maintenance quality, utilization, and the current cost of resources needed to produce equivalent output.
Company law may impose a separate maintenance rule. For example, section 830 of the UK Companies Act 2006 limits distributions to profits available for the purpose, while section 831 adds a net-assets restriction for public companies.
Those legal tests do not mean every increase in accounting net assets is distributable. Realized-profit rules, undistributable reserves, relevant accounts, approvals, and other statutory provisions can matter.
The selected benchmark can change:
For investors and creditors, the practical question is not merely whether capital increased. It is whether the increase remains after owner financing, distributions, inflation, and resources required to sustain the business.
This material is educational and is not accounting, legal, regulatory, tax, financing, or investment advice.