What it means
Encumbrance accounting exists to solve a timing problem. An organisation might have $500,000 left in its annual budget, but if it has already signed $200,000 of purchase orders that have not yet been invoiced, only $300,000 is genuinely available to commit to anything new.
Recording an encumbrance the moment a purchase order or contract is issued, rather than waiting for the invoice, prevents a department from accidentally over-committing funds it does not actually have. The lifecycle runs in three stages.
When a purchase order is raised, the estimated amount is encumbered, reducing the available budget. When the goods or services are received and invoiced, the encumbrance is reversed and the actual expense is recorded instead, which may be a slightly different amount than the original estimate.
If a purchase order is cancelled before completion, the encumbrance is simply released back into the available budget. This system is especially important in government and public sector accounting, where budgets are legally binding appropriations and spending beyond them can carry real consequences.
Encumbrance accounting gives managers real-time visibility of what is genuinely still available, not just what has been formally spent so far. Many nonprofit organisations and universities use the same approach for grant-funded projects, where committed but unspent funds still need to be tracked against a fixed award.
The term also appears in a different but related sense in real estate and law, where an encumbrance is a claim, lien, easement or restriction against a property that limits its owner's rights or affects its transferability, such as a mortgage or an unpaid tax lien. Both meanings share the same underlying idea: something committed or attached that limits what is otherwise available.
In practice
Real-world examples.
Example
A school district issues a purchase order for $80,000 of new classroom furniture in August; the $80,000 is encumbered immediately, even though the invoice will not arrive until the furniture is delivered in October.
Example
A university research office encumbers the full remaining balance of a three-year grant against a signed subcontract with an external laboratory, so other departments cannot mistakenly draw on funds already committed.
Example
A city government releases a $25,000 encumbrance back into its available budget after a vendor contract is cancelled before any work began.
Think of it
“An encumbrance reserves budget money for something you've ordered but not yet received or paid for.
Formula
Calculation
Available Budget = Total Appropriated Budget minus Actual Expenditures minus Outstanding Encumbrances
Worked example. A city parks department has an annual budget of $2,000,000. So far this year it has spent $1,100,000 (actual expenditures) and has $350,000 of open purchase orders for equipment and contracted maintenance not yet invoiced (encumbrances).
Available budget = $2,000,000 minus $1,100,000 minus $350,000 = $550,000
Without tracking the encumbrance, a manager looking only at actual spending might believe $900,000 remained ($2,000,000 minus $1,100,000) and approve new commitments that would push the department over budget once the $350,000 of outstanding orders is eventually invoiced.Case study
Seen in the real world.
A county government's public works department was repeatedly finishing the fiscal year having overspent its equipment budget, despite finance reports showing spending tracking under budget every month. An audit found the department had never adopted encumbrance accounting; it recorded expenses only when invoices were paid, often months after equipment was ordered. By year end, a backlog of unrecorded purchase orders worth $410,000 hit the books all at once, blowing through the remaining budget.
The county implemented encumbrance tracking the following year, requiring every purchase order to be recorded as a commitment against the budget the moment it was issued. Monthly reports immediately began showing a more honest, lower "available to spend" figure, and department heads adjusted their ordering pace accordingly. The following year, the department finished within 2% of its approved budget for the first time in five years.
Watch out
Common mistakes.
- Treating unspent budget as fully available without checking for outstanding encumbrances, leading to accidental over-commitment once pending purchase orders are eventually invoiced.
- Forgetting to release encumbrances when a purchase order is cancelled or reduced, which understates the true available budget indefinitely.
- Confusing an encumbrance with an actual expense. An encumbrance is a reservation of funds, not a recorded cost, and the two should never be added together as if both were spending.
Questions
People also ask.
Is an encumbrance the same as an accrual?
No. An accrual records an expense that has been incurred but not yet paid; an encumbrance records a commitment for a future expense that has not yet been incurred at all.
Who uses encumbrance accounting?
Mostly government bodies, universities, nonprofits and grant-funded organisations, where budgets are fixed appropriations rather than flexible internal targets, though some private companies use similar commitment tracking for large capital projects.
What happens to an encumbrance at year end?
Policies vary; some organisations carry open encumbrances forward into the new fiscal year against the same budget line, while others require them to lapse and be re-appropriated.
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