Free Online Tool

DA Arrear Calculator

Calculate Dearness Allowance arrears for central government employees. Enter your basic pay, old and new DA percentages, and the arrear period to get the exact amount.

What is the DA Arrear Calculator?

The DA Arrear Calculator helps central and state government employees calculate the arrears they are entitled to when Dearness Allowance is revised. Whenever the government increases DA from an earlier effective date (like January or July), the difference for the intervening months is paid as arrears. This calculator instantly computes the amount based on your basic pay, old and new DA percentages, and the number of months in the arrear period.

DA arrears can be a significant lump sum, especially when there is a gap of several months between the effective date and the announcement date. For example, if DA is increased by 3% from January and announced in March, you get arrears for January and February along with your March salary.

How to Use the DA Arrear Calculator

Using the DA arrear calculator takes only a few seconds:

  1. Enter your Basic Pay — from your salary slip.
  2. Enter the Old DA% — the DA rate before revision.
  3. Enter the New DA% — the revised DA rate.
  4. Enter the number of months in the arrear period (typically 1-6 months).
  5. Click Calculate — your monthly DA difference and total arrear are displayed.

For example: Basic Pay = ₹45,600, Old DA = 50%, New DA = 53%, Months = 6. DA Difference = 3%. Monthly Difference = (45,600 × 3) / 100 = ₹1,368. Total Arrear = ₹1,368 × 6 = ₹8,208.

DA Arrear Calculation for Different Scenarios

The same formula applies across all categories: DA Arrear = Basic Pay × DA Difference % × Months / 100. For pensioners, use Basic Pension instead of Basic Pay. For employees in the 6th Pay Commission, use the corresponding basic pay scale. For bank employees (who follow IDA), the calculation differs because IDA is revised quarterly with different slabs.

If you have multiple DA revisions pending, calculate arrears for each revision separately and add them together. For example, if DA went from 46% to 50% (6-month period) and then 50% to 53% (another 6-month period), calculate each period separately.

Tax Implications of DA Arrears

DA arrears are fully taxable in the year of receipt. However, you can claim relief under Section 89(1) if the arrears push you into a higher tax slab. File Form 10E with your income tax return to claim this relief. The relief is calculated by comparing the tax that would have been payable in the year the arrears relate to versus the current year. Our calculator focuses on the arrear amount — consult a tax advisor for Section 89(1) relief calculation.

Frequently Asked Questions

How to calculate DA arrears?
DA arrears are calculated using the formula: DA Arrear = (Basic Pay × (New DA% - Old DA%) / 100) × Number of Months. For example, if your basic pay is ₹45,600, DA increased from 50% to 53%, and the arrear period is 6 months: Monthly Difference = (45,600 × 3%) / 100 = ₹1,368. Total Arrear = ₹1,368 × 6 = ₹8,208.
How to calculate DA arrears for central government employees?
For central government employees, DA arrears are calculated by finding the difference between the old and new DA rates, applying it to your basic pay, and multiplying by the number of months in the arrear period. The formula is: Arrear = Basic Pay × (New DA% - Old DA%) × Months / 100. This applies to both serving employees and pensioners.
What is the DA arrear period for 2026?
DA for central government employees is revised from January 1st and July 1st each year. Arrears are paid from the effective date of revision. For example, if DA is revised from January 2026 and announced in March 2026, arrears for January and February are paid along with March salary. Arrear periods are typically 1-3 months depending on when the government announces the revision.
Are DA arrears taxable?
Yes, DA arrears are fully taxable in the year they are received. Since DA is part of your salary income, arrears are treated as salary income and taxed at your applicable slab rate. You cannot claim any exemption on DA arrears under the Income Tax Act. However, if arrears push you into a higher tax bracket, you can file Form 10E to report arrears under Section 89(1) for relief.
What is the DA arrear for pensioners?
DA arrears for pensioners (also called DR arrears) are calculated using the same formula: DR Arrear = Basic Pension × (New DA% - Old DA%) × Months / 100. Pensioners receive arrears for the period between the effective date of revision and the date the revised pension is implemented. Family pensioners are also eligible for DR arrears.
How to calculate DA arrears for 7th Pay Commission?
Under the 7th Pay Commission, DA arrears follow the same basic formula. The key is to use the correct basic pay as per the 7th CPC pay matrix. Level and index in the pay matrix determine your basic pay. The arrear calculation is: (Basic Pay × DA Difference % / 100) × Number of Months. Each DA revision (every 6 months) creates a potential arrear period.
When is DA arrear paid by the government?
DA arrears are typically paid along with the salary of the month when the DA revision is announced. For example, if the July 2025 DA revision is announced in September 2025, the arrears for July and August are paid in September. The Department of Expenditure issues an office memorandum announcing the effective date, rate, and implementation instructions.
How to calculate DA arrears for state government employees?
State government employees follow similar DA revision schedules as central employees, but the rates and effective dates may differ. To calculate DA arrears for state government: use your state's specific old and new DA percentages with the formula: Arrear = Basic Pay × (State New DA% - State Old DA%) × Months / 100. Each state issues its own order for DA revision.
What is the formula for DA arrear calculation in Excel?
In Excel, create columns: Basic Pay (A1), Old DA% (B1), New DA% (C1), Months (D1). Formula for monthly difference: =A1*(C1-B1)/100. Formula for total arrear: =A1*(C1-B1)/100*D1. Copy this formula for each employee. To calculate the total arrear for all employees: =SUM(E:E). Use absolute references for fixed percentages if needed.
How is DA arrear calculated for railway employees?
Railway employees are central government employees and follow the same DA revision schedule and calculation formula. The arrear is calculated as: Basic Pay × DA Difference % × Months / 100. Railway employees should use their basic pay as per the 7th CPC pay matrix applicable to railways. The department issues specific orders through Railway Board.
What is the difference between DA and DA arrears?
DA (Dearness Allowance) is the ongoing monthly allowance paid to government employees at the current rate. DA arrears is the backlog amount for the period between the effective date of a DA revision and its actual implementation. For example, if DA is revised from January with effect but paid from March, the January-February difference is arrears.
Can I calculate DA arrears for multiple employees at once?
Yes, to calculate DA arrears for multiple employees: create an Excel sheet with columns for employee name, basic pay, old DA%, new DA%, and months. Use the formula: Arrear = Basic Pay × (New DA% - Old DA%) × Months / 100. Copy the formula for all employees. Sum the totals to get the overall arrear amount your organization needs to pay.
What documents are needed for DA arrear payment?
DA arrear payment is automatically processed by the Pay & Accounts Office. Employees do not need to submit separate documents for DA arrears. However, HR departments need to maintain: 1) Basic pay records, 2) DA revision orders, 3) Arrear calculation sheets, 4) Disbursement statements. For audit purposes, all DA arrear calculations should be documented with proper references.
How is DA arrear calculated for employees on deputation?
For employees on deputation, DA arrear is calculated based on their basic pay in the parent department. The deputation department reimburses the salary, but DA rules of the parent department apply. The formula remains: Arrear = Basic Pay (Parent) × (New DA% - Old DA%) × Months / 100. The parent department issues the DA revision order.

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