TaxLawGHby MSL Business School
MSL Business SchoolGhana assessment and adjustment guide
Ghana Tax Assessments and Amended Assessments
A legal map of self-assessment, GRA assessments, adjusted or commonly called amended assessments, pre-emptive assessments, statutory time limits, notice requirements, payment and objections.
Published and prepared by MSL Business School through TaxLawGH, its tax and fiscal policy education platform.
MSL Business School assessment rules at a glance
Controlling answer
Act 915 recognises self-assessment, Commissioner-General assessments and adjusted assessments.
A filed return ordinarily creates a self-assessment. GRA may assess where no effective self-assessment exists and may issue an adjusted assessment to make the taxpayer liable for the correct amount.
“Amended assessment” is a useful search term, but Act 915's statutory expression is “adjusted assessment.” Every assessment should be tested for legal basis, limitation period, calculation, service, payment date and objection rights.
Assessment types
The route depends on who makes the assessment and why.
| Assessment route | Trigger | Legal effect |
|---|---|---|
| Self-assessment | A person is obliged to file a return and files it under the governing tax law. | The return states and establishes the taxpayer's assessed liability, subject to adjustment. |
| Commissioner-General assessment | No return, another non-self-assessment case, or an assessment required by the charging law. | GRA determines the liability and serves a statutory notice. |
| Adjusted assessment | The original or earlier adjusted assessment does not produce the correct amount. | The earlier assessment ceases to have effect to the extent of the adjustment. |
| Pre-emptive assessment | A statutory risk event under sections 28(3) and 38. | GRA assesses tax payable or to become payable before the ordinary process concludes. |
| Interest or penalty assessment | A statutory interest or penalty liability arises. | GRA serves the applicable assessment notice under section 77. |
Assessment time limits
Six years is the general rule—not an absolute shield.
The normal power expires six years after the date on which the Commissioner-General was first entitled to make the assessment.
Measure six years from the return due date or, if later, the date on which the return was filed.
Measure from the date on which GRA served the original assessment notice.
Use the corresponding measuring date for the original assessment that is being adjusted.
An assessment may be made at any time where fraud by or on behalf of the taxpayer is discovered.
The same any-time exception applies where wilful default or serious omission is discovered.
Period analysis: Always identify the tax, return, original assessment, service date, later adjustments and alleged exception before concluding that an assessment is out of time.
Pre-emptive assessment
The Commissioner-General may assess early where collection or compliance is at risk.
A person becomes bankrupt, is wound up or enters liquidation before the ordinary return date.
GRA reasonably believes the person is about to leave Ghana indefinitely.
GRA reasonably believes the person is about to cease activity or business in Ghana.
GRA reasonably believes the person has committed an offence under a tax law.
The Commissioner-General considers early action appropriate because records are not adequately maintained.
Instead of a pre-emptive assessment, GRA may accept security for outstanding and future liabilities.
A pre-emptive assessment does not ordinarily remove the duty to file the eventual return. Tax paid against it is credited against the self-assessment covering the same period, event or tax.
Assessment notice
A valid notice must disclose the liability and the route to challenge it.
| Required element | Control question |
|---|---|
| Taxpayer name and TIN | Does the notice identify the correct legal person and taxpayer account? |
| Tax, period, event or matter | Is the assessed subject clearly defined? |
| Tax payable and remaining balance | Are credits, reductions and prepayments recognised? |
| Calculation | Can the arithmetic and statutory base be reconstructed? |
| Reason | Does the notice explain why the Commissioner-General made the assessment? |
| Payment date | Is the due date stated and consistent with Act 915? |
| Objection instructions | Does the notice state the time, place and manner of objecting? |
| Service | Can the taxpayer establish when and how the notice was served? |
Returns, corrections and adjustments
A correction request and an adjusted assessment are different legal acts.
- 01Find the filed position
Preserve the original return, computation, acknowledgement and payment record.
- 02Identify the error
Determine whether the return is factually incorrect, legally misclassified or misleading in a material particular.
- 03Notify GRA
Submit the required further information and obtain permission where an after-due-date amendment is restricted.
- 04Recalculate the complete liability
Correct income, deductions, credits, rates, penalties and interest rather than changing one isolated number.
- 05Track GRA's decision
The Commissioner-General may use the information in making an assessment or adjusted assessment.
- 06Challenge the tax decision if necessary
Use the statutory objection route; a portal correction alone does not replace an objection to a served assessment.
Payment and challenge
Assessment, payment and objection clocks can run at the same time.
Tax is payable on the date specified in the assessment notice.
Tax is generally payable thirty days after service of the notice.
Tax remains payable despite administrative or judicial proceedings unless the statutory suspension rules apply.
A taxpayer dissatisfied with an assessment must lodge a precise objection within the statutory period and satisfy the applicable payment condition.
Interest can continue even while a dispute is being pursued, subject to the Act and the final outcome.
Preserve the notice, service evidence, computation, ledgers, returns, correspondence and proof of payment.
Frequently asked questions
Ghana tax assessment questions
What is a self-assessment in Ghana?
Where a person is required to file a tax return, the filed return generally constitutes the person's own assessment of the tax liability under the relevant tax law.
What is an amended assessment called under Act 915?
Act 915 uses the term adjusted assessment. The common phrase amended assessment ordinarily refers to an assessment changed so the taxpayer bears the correct tax for the relevant circumstances.
Can GRA assess a person who did not file?
Yes. The Commissioner-General may use best judgment and information reasonably available to assess a person who fails to file on time.
What is the normal assessment time limit?
Subject to fraud, wilful default or serious omission, Act 915 generally sets a six-year limit, measured according to the type of original or adjusted assessment.
Can GRA assess outside six years?
Act 915 permits an assessment at any time where fraud, wilful default or serious omission by or on behalf of the taxpayer is discovered.
What is a pre-emptive assessment?
It is an assessment made in the risk circumstances described by sections 28(3) and 38, such as impending departure, cessation, liquidation, an offence concern or inadequate documentation.
What must an assessment notice contain?
The notice must identify the taxpayer and TIN, state the tax and balance, explain the calculation and reason, give the payment date, and state the time, place and manner of objecting.
When is tax on an adjusted assessment due?
Act 915 generally makes tax on an adjusted assessment payable thirty days after service of the assessment notice, subject to the governing provisions and any valid suspension.
Does an objection automatically stop collection?
No. Tax generally remains payable despite dispute proceedings unless a statutory suspension applies.
Primary authority
Legal reference map
- Revenue Administration Act, 2016 (Act 915), sections 31–46Late returns, assessment types, time limits, notices, tax decisions, objections and payment.
- Income Tax Act, 2015 (Act 896), sections 124–126Annual return of income, exclusions and the resulting self-assessment.
- GRA penalties guidanceAdministrative overview of return, statement, payment and documentation consequences.
Institutional publisher
TaxLawGH is MSL Business School's Ghana tax education platform.
This guide forms part of MSL Business School's public tax and fiscal policy education work. TaxLawGH explains Ghana's tax administration rules accurately and accessibly without replacing the legislation, an official tax decision or advice on specific facts.
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