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Declining-Balance Depreciation Calculator

Apply a depreciation rate to an asset's opening carrying amount.

Runs locally

Inputs and results stay in this browser. Currency symbols are illustrative; use any consistent currency.

Period depreciation$8,000.00
Closing book value$32,000.00

Understand Declining-balance depreciation

One idea, three depths

Choose how deeply to explain Declining-balance depreciation

Declining-balance depreciation: Apply a depreciation rate to an asset's opening carrying amount.

Age 5Explain it to a 5-year-oldStart with a picture

Imagine using Declining-balance depreciation to answer this question: apply a depreciation rate to an asset's opening carrying amount? Enter Opening book value and Depreciation rate; the calculator shows Period depreciation. For example: A $40,000 opening book value at 20% produces $8,000 depreciation and a $32,000 closing value. The answer tells you Period depreciation.

Age 15Explain it to a 15-year-oldConnect it to the formula

Declining-balance depreciation recognises more expense while the carrying amount is high and less as it falls. Residual-value limits require a complete schedule. The rule is Period depreciation = Opening book value × depreciation rate. Its input values are Opening book value, Depreciation rate (%), and the main result is Period depreciation. For example: A $40,000 opening book value at 20% produces $8,000 depreciation and a $32,000 closing value.

CollegeExplain it at college levelState the model precisely

This calculator evaluates one accounting relationship within a consistent entity, currency, reporting period and recognition policy. The implemented relation is Period depreciation = Opening book value × depreciation rate, evaluated from Opening book value, Depreciation rate (%) to produce Period depreciation. Declining-balance depreciation recognises more expense while the carrying amount is high and less as it falls. Residual-value limits require a complete schedule. Recognition, measurement, tax, consolidation, foreign-currency and disclosure rules may require adjustments under the accounting framework that applies to the entity.

What this accounting tool does

Apply a depreciation rate to an asset's opening carrying amount.

Why the relationship works

Declining-balance depreciation recognises more expense while the carrying amount is high and less as it falls. Residual-value limits require a complete schedule.

The accounting formula

Period depreciation = Opening book value × depreciation rate

Inputs and period consistency

This model uses Opening book value, Depreciation rate. Use the same reporting period, currency, entity boundary and accounting policy for every input.

What the result means

The primary output is Period depreciation; supporting outputs include Closing book value. Trace each amount back to the relevant ledger or statement line before relying on it.

Worked accounting example

A $40,000 opening book value at 20% produces $8,000 depreciation and a $32,000 closing value.

Limits of this compact model

The calculator teaches one relationship. Recognition, measurement, tax, consolidation, foreign-currency and disclosure rules may require additional adjustments under the framework that applies to the entity.

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Supporting sourcesAcademic referencesPrimary standards, textbooks and complete citations

Standards, reading and academic references

Use the calculator as the worked interaction, then consult the primary standards and academic textbooks listed below. MW SysArc links to the original sources; the explanation on this page is original and does not reproduce them.

Principles of Accounting, Volume 1: Financial Accounting

Read the free OpenStax financial accounting textbook
Cite this book
APA 7
Franklin, M., Graybeal, P., & Cooper, D. (2019). Principles of accounting, volume 1: Financial accounting. OpenStax. https://openstax.org/books/principles-financial-accounting/pages/1-why-it-matters
MLA 9
Franklin, Mitchell, et al. Principles of Accounting, Volume 1: Financial Accounting. OpenStax, 2019, https://openstax.org/books/principles-financial-accounting/pages/1-why-it-matters.
Chicago author-date
Franklin, Mitchell, Patty Graybeal, and Dixon Cooper. 2019. Principles of Accounting, Volume 1: Financial Accounting. Houston, TX: OpenStax. https://openstax.org/books/principles-financial-accounting/pages/1-why-it-matters.

OpenStax entries are free to read online. Follow the licence shown on each linked source before redistributing or adapting its content.

Reuse the page responsiblyCite this pageAPA, MLA, Chicago, Harvard, BibTeX and RIS

These formats cite this calculator page itself. They are separate from the academic references above, which support the mathematical method and terminology.

Organizational author: MW SysArc. Published:. Canonical page:https://accounting.mwsysarc.com/declining-balance-depreciation.

APA 7

MW SysArc. (2026, July 21). Declining-Balance Depreciation Calculator. MW SysArc Tools. https://accounting.mwsysarc.com/declining-balance-depreciation

MLA 9

MW SysArc. “Declining-Balance Depreciation Calculator.” MW SysArc Tools, 21 July 2026, https://accounting.mwsysarc.com/declining-balance-depreciation. Accessed 26 Aug. 2026.

Chicago 17

MW SysArc. “Declining-Balance Depreciation Calculator.” MW SysArc Tools. Published July 21, 2026. Accessed August 26, 2026. https://accounting.mwsysarc.com/declining-balance-depreciation.

Harvard

MW SysArc (2026) ‘Declining-Balance Depreciation Calculator’, MW SysArc Tools. Published 21 July 2026. Available at: https://accounting.mwsysarc.com/declining-balance-depreciation (Accessed: 26 August 2026).

BibTeX and RIS records

BibTeX

@misc{mwsysarc_declining_balance_depreciation_2026,
  author = {{MW SysArc}},
  title = {Declining-Balance Depreciation Calculator},
  howpublished = {MW SysArc Tools},
  year = {2026},
  url = {https://accounting.mwsysarc.com/declining-balance-depreciation},
  note = {Published July 21, 2026; accessed August 26, 2026}
}

RIS

TY  - ELEC
AU  - MW SysArc
TI  - Declining-Balance Depreciation Calculator
T2  - MW SysArc Tools
PY  - 2026
DA  - 2026-07-21
Y2  - 2026-08-26
UR  - https://accounting.mwsysarc.com/declining-balance-depreciation
N1  - Published July 21, 2026
ER  -

Clear answers

Frequently asked questions

What does the Declining-balance depreciation do?

Apply a depreciation rate to an asset's opening carrying amount.

How does the Declining-balance depreciation work?

The calculator applies Period depreciation = Opening book value × depreciation rate. Declining-balance depreciation recognises more expense while the carrying amount is high and less as it falls. Residual-value limits require a complete schedule.

What can I learn from the Declining-balance depreciation?

You will connect Opening book value, Depreciation rate to Period depreciation, then see how the relationship belongs in the accounting process.

Does MW SysArc receive or store what I enter?

No. The calculation runs locally in your browser. MW SysArc does not receive or store your calculation inputs.

How should I use the result?

Use the result as an educational or reconciliation reference. Confirm the reporting period, accounting policy and source records before relying on it.

Last reviewed . Calculations tested .

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