'Notice of Assessment' refers to your tax bill. It shows the types and amount of income brought to tax, deductions you have claimed, and the amount of tax payable by you; or repayable to you.

Types of income tax bills

Types of tax billsDescription
Notice of Assessment (Original) This is the tax bill computed based on the tax form(s) that you have submitted and/or information sent by organisations participating in the Auto-Inclusion Scheme.
Notice of Assessment (Amended) If we amend your tax assessment, you will receive a Notice of Amended Assessment. The 'Previous assessment' shows your tax payable from your previous tax bill.
 
If there is any credit in your tax account, we will provide you with a refund of the credit amount.
Notice of Assessment (Additional) If we revise your tax assessment, you need to pay the additional taxes. You will receive the Notice of Additional Assessment and the additional tax you need to pay is shown as 'Additional Tax Payable'.
Notice of Assessment (Repayment) If there is any credit amount to be refunded to you, you will receive a Notice of Repayment instead of a Notice of Assessment.
Notice of Assessment (Estimated) If you have not filed your Income Tax Return by the due date, we may estimate your tax based on information available and send you an Estimated Notice of Assessment. The estimated tax is shown as 'Estimated Tax Payable'.

Tax terms on tax bills

Look forward to redesigned notices with a fresh new look:

Redesigned Tax Bill


Tax terms ExplanationExample
Year of Assessment This refers to the tax year in which your income tax is calculated and charged. The assessment is for income you have earned in the preceding calendar year. Year of Assessment 2021 is for income earned from 1 Jan 2020 to 31 Dec 2020.
Income The amount reflected under 'Income' is your total income after deducting allowable expenses.

The total income includes:  

  • employment income;
  • trade income for the accounting year; and/or
  • other income such as rental income.
Deductions Deductions like donations and reliefs can help lower your income subject to tax.  
Chargeable income This refers to your 'Income', after subtracting 'Deductions'.  
Tax payable This refers to the amount of tax that you need to pay. 'Tax payable by 27 May 2021 $8,586.00' means you must pay $8,586.00 to IRAS by 27 May 2021, unless you are paying your taxes via GIRO.
Tax repayable/discharged This refers to the amount of tax that will be refunded to you. 'Tax repayable/discharged $300' means $300 will be refunded to you.

General income tax glossary

Tax termsExplanationExample
Basis period This refers to the period of income relevant to the Year of Assessment (YA). The basis period for a YA is the year preceding that YA.
 
The basis period for YA 2021 is 1 Jan 2020 to 31 Dec 2020.
 
If you receive business income, the basis period may be different if your accounts are made up to a date other than 31 Dec.
Example 1: Employment income
 
Mr Tan has employment income from 1 Jan 2020 to 31 Dec 2020. This income is earned in the basis period from 1 Jan to 31 Dec 2020 and hence, it will be assessed in the Year of Assessment 2021.
 
Example 2: Business income
 
Mr Lee is a sole-proprietor. His business financial year ends on 31 Mar 2020. His business income is earned in the basis period from 1 Apr 2019 to 31 Mar 2020 and hence, it will be assessed in the Year of Assessment 2021.
Assessable income This is your total income after deducting allowable expenses and approved donations.

Total income includes:

  • employment income;
  • trade income for the accounting year; and/or
  • other income such as rental income.

Note: Chargeable income is the remainder of your assessable income after deducting personal reliefs.
Mr Lim has:
 
Employment income = $50,000
 
Allowable expenses and donations = $5,000
 
Assessable income = $50,000 - $5,000 = $45,000
 
Personal reliefs = $10,000
 
Chargeable income = $45,000 - $10,000 = $35,000
Personal reliefs There are deductions which can help you save tax.
 
These are allowable if:

  • You are a Singapore tax resident; and
  • You meet the qualifying conditions.