Fitment Arrears Calculator

Calculate your complete pay revision arrears due to fitment factor upgrade — for 8th CPC (2026), 7th CPC (2016), or any pay commission. Get month-by-month breakdown, DA/HRA arrears, NPS impact and Section 89(1) tax relief estimate.

2.57x7th CPC Fitment
2.28–2.86x8th CPC Projected
Jan 20268th CPC Effective
89(1)Tax Relief Available

Fitment Factor Arrears Calculator

Enter your current pay, select fitment factor and arrear period to get full breakdown

Select Fitment Factor
2.28x
8th CPC Min.
2.57x
8th CPC Expected
2.86x
8th CPC Max.
Custom
Enter below ↓
Custom Fitment Factor

Auto-filled when you click a button above
Pay Commission
8th Pay Commission (2026)7th Pay Commission (2016)Custom / State Govt.

📌 Old Monthly Pay (Pre-Revision)

Basic Pay—
DA (55%)—
HRA (27%)—
Transport Allowance—
Total Monthly Pay—

✅ New Monthly Pay (Post-Fitment)

Revised Basic Pay—
DA (0%)—
HRA (27%)—
Transport Allowance—
Total Monthly Pay—

📐 Fitment & Monthly Difference
Fitment Factor Applied—
Basic Pay Increase / month—
DA Amount Difference / month—
HRA Difference / month—
TA Difference / month—
Net Monthly Increase—
% Pay Hike (Gross)—
Arrear Months—

💰 Gross Arrear – Component-wise
Basic Pay Arrears—
DA Arrears—
HRA Arrears—
TA Arrears—
💰 Total Gross Arrears
—

📉 Deductions on Arrears
NPS/PF Deduction on Arrears (10% of basic+DA diff)—
TDS on Arrears (estimated)—
Total Deductions—
🏠 Net Arrears (In-Hand)
—

📅 Month-by-Month Arrears Breakdown

🔭 All Fitment Scenario Comparison

Fitment Factor & Pay Commission Arrears – Complete Guide

Understanding 8th CPC fitment, how arrears are calculated and tax implications for 2026

📐 What is a Fitment Factor?

DEFINITION

Fitment Factor Explained

A fitment factor is a single multiplier applied to the existing basic pay to arrive at the new revised pay under a new pay commission. It absorbs the accumulated DA and provides a real pay hike simultaneously.

FORMULA

How It Works

New Basic = Old Basic × Fitment Factor (rounded to nearest ₹100). E.g., Old Basic ₹47,600 × 2.57 = ₹1,22,332 → rounded to ₹1,22,300. The new basic is then fixed in the new pay matrix at the appropriate cell.

DA RESET

DA is Reset to Zero

When a new pay commission is implemented, DA resets to 0% on the new basic. The existing DA (55% on 7th CPC) is absorbed into the new pay via the fitment factor. New DA accrual starts fresh from 0%.

ARREARS

Why Arrears Arise

Pay commissions are typically effective from 1st January of the year but implemented months later. For 8th CPC, if effective Jan 2026 but implemented August 2026, employees get 8 months of arrears — the difference between old and new pay for those months.

7th CPC

7th CPC Example (2016)

7th CPC fitment factor was 2.57x. Effective 1 Jan 2016, implemented Aug 2016. This generated 8 months of arrears. Minimum pay jumped from ₹7,000 to ₹18,000. Total arrears for a mid-level employee were ₹1.5–₹3 lakhs.

8th CPC

8th CPC Projection (2026)

8th CPC is expected effective 1st January 2026. Projected fitment: 2.28x to 2.86x. Minimum pay projected at ₹41,000–₹51,480. Implementation expected mid-2026, generating 6–12 months arrears.

📊 Fitment Factor – All Pay Commissions

Pattern: Fitment factor tends to be higher when accumulated DA is higher — to absorb the DA into the new basic. Since 7th CPC had 125% DA, its 2.57 fitment already absorbed significant value. With 8th CPC at ~55% DA, the fitment may be lower (2.28–2.57x) but still gives a meaningful real pay increase over 7th CPC.

🧮 How Fitment Arrears Are Calculated

1

Identify Effective Date: The arrear period starts from the date the new pay commission is effective (e.g., 1 Jan 2026 for 8th CPC) and ends the month before actual salary in hand is revised.

2

Calculate New Basic: New Basic = Old Basic × Fitment Factor → Round to nearest ₹100. This is then fixed at the appropriate cell in the new pay matrix (next higher value if needed).

3

Calculate Monthly Difference: Monthly Arrear = (New Basic + New DA + New HRA + New TA) − (Old Basic + Old DA + Old HRA + Old TA). Since DA resets to 0%, New DA is often ₹0 initially.

4

Multiply by Arrear Months: Total Gross Arrear = Monthly Difference × Number of Arrear Months. DA arrear = difference in DA amounts (new DA on new basic vs old DA on old basic).

5

Deduct NPS/PF: Since basic pay increases, NPS/PF contribution on the difference (10% of basic+DA increase × months) is deducted. This also increases your retirement corpus.

6

Tax Treatment: Arrears are taxable as salary income. File Form 10E on the Income Tax portal before your ITR to claim Section 89(1) relief and avoid higher tax bracket impact.

💰 8th CPC Projected Pay – Level-wise Comparison (2026)

Note: “Monthly Hike” = New Basic − Old Basic (basic only, DA resets to 0%). Monthly hike in gross pay (including old DA absorbed) is effectively the full new basic since DA of 55% is now baked in. New HRA and TA rates to be notified separately. Figures rounded to nearest ₹100.
📊 Also See: Grade Pay 4800 Calculator | Increment Arrears Calculator | DOPPW Official

💸 Tax on Fitment Arrears – Section 89(1) Relief

⚠️ Important: If you do NOT file Form 10E before submitting ITR, the Income Tax Department will disallow the Section 89(1) relief during processing. This is the most common mistake government employees make when receiving pay revision arrears. The relief can be substantial — saving ₹15,000–₹80,000+ in tax depending on the arrear amount and your income bracket.

📘 How to Use the Fitment Arrears Calculator

Start by selecting a fitment factor or enter a custom factor if you want to test a specific scenario. Then enter the current Basic Pay, current DA, HRA and TA values. These fields represent the pre-revision salary structure, so they should match the employee’s actual pay immediately before the new pay commission is applied.

Next, calculate or enter the revised Basic Pay. The page can auto-calculate it from the selected factor, but users should still compare the result with the eventual new Pay Matrix cell if an official matrix becomes available. The Pay Matrix Calculator can help verify the current 7th CPC Basic Pay before projection.

Set the arrear-from and arrear-to months carefully. The calculator counts the period inclusively, so January through June is six months. If implementation starts in the middle of a month or the rules specify a different treatment, adjust the period to match the actual order.

Finally, choose whether to include DA, HRA, TA, NPS/PF and TDS. Keeping each component optional makes it easier to isolate the basic-pay arrear first and then build the full gross and net arrear estimate.

📐 Fitment Factor vs Revised Basic Pay

The fitment factor is a multiplier used to translate the old Basic Pay into a revised Basic Pay. A higher factor increases the revised basic and therefore affects HRA, retirement contributions and future DA calculations as well. This is why small changes in the factor can produce a large difference over several arrear months.

The calculator rounds the auto-calculated Basic Pay to the nearest ₹100. That is a convenient projection rule, but an actual Pay Commission may prescribe a new matrix and a specific fixation method. Once official rules exist, the final revised Basic Pay should be taken from those rules rather than from a simple multiplication alone.

For background on how fitment works, use the Fitment Factor Guide. It is useful when comparing scenarios such as 2.28x, 2.57x and 2.86x because it separates accumulated DA absorption from any additional real-pay increase.

When comparing two fitment scenarios, keep all other inputs constant. This isolates the effect of the multiplier and prevents HRA, TA or TDS changes from obscuring the pay difference.

💰 How Gross Fitment Arrears Are Built

Gross fitment arrears are the sum of the monthly differences between the old and revised salary structures across the selected arrear period. The calculator separates Basic Pay, DA, HRA and TA so each component can be reviewed individually before the total is shown.

Basic Pay arrears are usually the largest component. DA can create a negative or positive difference depending on whether the old DA is absorbed into the revised basic and the new DA resets to zero. HRA generally rises because it is applied to the higher revised basic, assuming the same percentage remains in force.

TA should be included only if a revised TA amount is known or a rule specifically creates a TA difference. If TA has not changed, leaving the new value at the old amount avoids inventing arrears that do not exist.

For a separate historical DA check, use the DA Arrears Calculator. Fitment arrears and ordinary DA arrears are different: one comes from a new pay structure, while the other comes from a change in DA percentage under the same pay structure.

🏠 HRA and TA in Pay Revision Arrears

HRA can become a major part of fitment arrears because it is percentage-based on Basic Pay. Even if the HRA rate remains unchanged, a much higher revised Basic Pay can produce a large monthly housing difference. This is why HRA is included as an optional component in the calculator.

Use the HRA Calculator when you want to verify the housing component independently. This is especially useful if the employee changed city category or moved into Government accommodation during the arrear period.

TA is different because it is generally a fixed allowance amount rather than a direct percentage of Basic Pay. Do not assume it scales automatically with the fitment factor. Enter a revised TA only when you have a specific figure or want to model a scenario.

For a clean comparison, calculate Basic and HRA first, then add TA last. This prevents the fixed allowance from being confused with the structural pay revision.

🛡️ NPS / PF Impact on Arrears

When Basic Pay increases retrospectively, retirement contributions can also require adjustment for the arrear months. The calculator provides an NPS/PF percentage field so the employee-side deduction can be estimated on the difference in Basic plus DA.

The employee contribution reduces immediate cash in hand, but it is not simply lost. For NPS, the corresponding employer contribution can also increase the retirement corpus under the applicable rules. This page focuses on the employee-side deduction used to estimate net arrears.

If you are comparing retirement systems, the NPS vs Old Pension guide provides the broader context. The contribution mechanics differ from GPF/OPS, so the same arrear salary can produce different cash-in-hand results.

When reconciling an arrear statement, compare gross arrears first and the retirement deduction second. This makes it easier to see whether a mismatch comes from pay revision or from the contribution calculation.

🧾 TDS and Section 89(1) Planning

A large pay-revision arrear is taxable in the year it is received, even though it relates to earlier months. This can increase taxable income sharply in one year. The TDS option on the page gives a rough cash-in-hand estimate, but it is not a substitute for a full income-tax calculation.

Section 89(1) relief is designed for situations where salary arrears create extra tax because income is bunched into the year of receipt. The practical calculation compares tax in the receipt year with tax as if the arrears had been allocated back to the relevant earlier years.

Keep the month-wise arrear breakdown generated by the calculator. That record is more useful than only the final lump sum because tax relief calculations depend on when the income originally belonged.

For salary planning, treat TDS as an estimate and keep gross arrears separate from tax relief. Net cash can change later when the final tax return is filed.

📅 Month-by-Month Arrears Verification

The month-wise table is one of the most useful parts of the calculator because it shows the same component differences repeated across each arrear month. This makes it easy to match the estimate with a payroll arrear statement.

If Basic Pay, HRA category or TA changed during the arrear period, one flat monthly difference may no longer be correct. In that case, split the period into separate calculations rather than forcing all months into one block.

For example, if an employee received promotion in April while arrears run from January to June, calculate January–March on the old pre-promotion pay and April–June on the revised pay. Then add the two arrear totals.

This method also works for retirement or pension transition cases where the salary base changes before implementation is completed.

👴 Fitment Arrears for Pensioners

Pensioners can also receive arrears when pension is revised retrospectively under a new Pay Commission. The calculation principle is similar: compare the old pension with the revised pension for each pending month and total the difference.

The underlying pension fixation can differ from employee salary fixation, so pensioners should first verify the revised pension with the Revised Pension Calculator. Once the revised pension is known, the arrear period can be calculated more accurately.

Dearness Relief may reset or be restructured when a new pension base is introduced, just as DA can reset on revised employee pay. Keep pension arrears and DR arrears separate until the final reconciliation.

For tax purposes, pension arrears can also create bunching of income in the year of receipt, so the same principle of preserving a year-wise breakup remains important.

Frequently Asked Questions

Common queries about fitment factor and 8th Pay Commission arrears in India

What is the expected fitment factor for 8th Pay Commission?▾
The 8th Pay Commission is expected to recommend a fitment factor in the range of 2.28x to 2.86x, with 2.57x being the most widely projected figure (same as 7th CPC). At 2.57x, the minimum pay would rise from ₹18,000 to approximately ₹46,260 (rounded to ₹46,300). The Staff Side of the National Council (JCM) has demanded a fitment of 3.68x citing inflation, though this is unlikely to be accepted fully. The Commission’s final report is expected by December 2025 – March 2026, with implementation mid-2026.
Why does DA reset to zero after pay commission revision?▾
When a new pay commission revises salaries through a fitment factor, the existing Dearness Allowance is merged into the new basic pay. The fitment factor is specifically designed to account for the DA accumulated since the last pay commission — so applying the factor to the old basic automatically includes the old DA’s value in the new basic. For 8th CPC: current DA is ~55% of 7th CPC basic. After revision with fitment 2.57x, the new basic absorbs that 55% DA plus gives an additional real increment. DA then restarts from 0% on the new, higher basic — as happened after every previous pay commission implementation.
How many months of arrears will 8th CPC generate?▾
The 8th Pay Commission is expected to be effective from 1st January 2026. If it is implemented (salary actually revised) in August or September 2026, employees will receive 8–9 months of arrears (January to August/September 2026). If implementation is delayed to December 2026, it could be up to 12 months of arrears. For comparison, the 7th CPC generated 8 months of arrears (Jan–Aug 2016), paid out in August 2016. The 6th CPC generated the longest period — about 30 months of arrears (Jan 2006 – June 2008).
Is NPS deducted on pay revision arrears?▾
Yes. Since NPS is calculated as 10% of (Basic + DA) for employees, the increase in basic pay due to fitment factor means retroactive NPS contributions are required for the arrear months. The employee NPS on arrears = 10% of (new basic+DA − old basic+DA) × number of months. Similarly, the employer NPS (14%) is also contributed for all arrear months — this goes into your NPS Tier-I corpus, boosting your retirement savings. The employee NPS deduction reduces your immediate cash-in-hand from arrears but qualifies for 80CCD(1) tax deduction.
Are fitment arrears paid in one lump sum or in installments?▾
Historically, pay commission arrears for Central Government employees have been paid in installments to manage fiscal burden. For 7th CPC (2016): arrears were released in two installments — 60% of the arrear amount in the first tranche and 40% in the second tranche (about 6 months later). However, in some cases full arrears were released in one go. For 8th CPC, the government may follow a similar installment approach or pay full arrears depending on the fiscal position. State government employees follow the respective state government’s release schedule — often delayed by 1–3 years after the central government implementation.
How is HRA calculated after pay revision?▾
HRA percentage rates typically remain the same after pay revision (X: 27%, Y: 18%, Z: 9% for 7th CPC). However, since HRA is calculated on the new (higher) basic pay, the HRA amount increases significantly. For example, if old basic was ₹47,600 (HRA = ₹12,852 at 27%) and new basic after 8th CPC at 2.57x is ₹1,22,300 (HRA = ₹33,021 at 27%), the monthly HRA difference is ₹20,169. Over 8 months of arrears, HRA arrears alone could be ₹1,61,352. The 8th CPC may also revise HRA percentages (possibly 30%/20%/10%) — the calculator accounts for any new HRA rate you enter.
What is the difference between fitment arrears and increment arrears?▾
Fitment arrears arise from a pay commission revision — the entire pay scale is restructured using a fitment factor (e.g., 2.57x), affecting all employees simultaneously, with DA reset and new pay matrix cells. Increment arrears arise from a delayed annual increment — only the specific employee’s pay increases by 3%, DA/HRA rise proportionally, and the old pay scale continues. Fitment arrears are typically much larger (restructuring 100%+ of pay) while increment arrears are smaller (3% of basic per year). Both are taxable; Section 89(1) relief via Form 10E applies to both. Both also generate NPS/PF adjustments for the arrear months.
Do pensioners also receive fitment arrears?▾
Yes. Retired pensioners receive a revision of pension under the new pay commission — their pension is revised using the same fitment factor applied to their last drawn pay. For 8th CPC, pensioners’ basic pension will be multiplied by 2.57x (or applicable factor). Pension arrears are calculated for the period from the effective date to the actual revision date. These pension arrears are taxable as pension income and Section 89(1) relief under Form 10E applies. Dearness Relief on pension also resets to 0% on the revised higher pension. DR then starts accruing fresh on the new, higher pension base.