Aykroyd formula

The Aykroyd formula is a need-based method that fixes a minimum wage from the priced cost of a normative basket of goods rather than from prevailing market wages, and it is the method Central Pay Commissions use to compute the minimum pay of a central government employee. It prices a diet of 2,700 calories per consumption unit per day for a family of three consumption units, adds clothing, housing, fuel and the other essentials in fixed proportions, and takes the total as the floor. The 7th Central Pay Commission ran it and got Rs. 17,992.98 as on 1 January 2016, rounded to a minimum pay of Rs. 18,000 a month.

The name is a shorthand rather than a description. Dr Wallace Aykroyd supplied the calorie and protein specification for an adequate Indian diet; the five norms that use it were adopted by the 15th Indian Labour Conference on 11 and 12 July 1957, a sixth component was added by the Supreme Court in 1991, and a seventh for skill was introduced by the 6th Central Pay Commission. Six of the seven components priced by the 7th CPC come from somewhere other than Aykroyd.

The formula matters because it fixes the floor from which the whole structure is scaled. Rs. 18,000 divided by the previous minimum of Rs. 7,000 gives 2.5714, printed as the fitment factor of 2.57, and every serving employee was moved onto the 7th Central Pay Commission matrix by that single multiple under Rule 7(1)(A) of the CCS (Revised Pay) Rules, 2016. The same Rs. 18,000 halved is the Rs. 9,000 minimum pension. It is also the ground on which the government and the employees’ side argue, because the same seven components run on different assumptions gave the staff side about Rs. 26,000.

This article sets out who Aykroyd was and what he actually contributed, the five 15th ILC norms with their quantities, the sixth and seventh components and where they came from, the arithmetic that produced Rs. 17,992.98, the staff-side computation of Rs. 26,000, which pay commissions used the method and which did not, how the result becomes the fitment factor and the pay matrix, the standing criticisms of the 2,700-calorie norm and the three-unit family, where the formula applies and where it does not, its effect on pension, and the position before the 8th CPC.

Dr Wallace Aykroyd and the calorie norm

Dr Wallace Ruddell Aykroyd (1899 to 1979) contributed one thing to Indian wage doctrine: the specification of what an adequate diet costs in calories, protein and fat. He was an Irish-born physician and nutritionist who directed the Nutrition Research Laboratories at Coonoor in the Nilgiris, succeeding Sir Robert McCarrison, advised the Government of India on nutrition, and served on the Bengal Famine Commission of 1944. He became the first head of the nutrition division of the Food and Agriculture Organisation, moving to Rome in 1951. His 1937 work on the nutritive value of Indian foods and the planning of satisfactory diets set out the calorie and protein content of a balanced Indian diet.

The wage idea that carries his name is that a minimum should be built up from nutritional need rather than read off the market. Instead of asking what employers pay, the method asks what a diet delivering a defined calorie and protein intake costs, then adds the other essentials a family cannot do without, and takes the price of that basket as the wage. Paragraph 4.2.3(ii) of the 7th CPC report reproduces the specification: 2,700 calories, 65 grams of protein and 45 to 60 grams of fat per consumption unit per day, with Aykroyd’s further point that animal proteins such as milk, eggs, fish, liver and meat are biologically more efficient than vegetable proteins and should form at least one fifth of the total protein intake.

Aykroyd himself never framed a wage formula. He wrote about nutrition, and a labour conference thirty years later took his diet specification and built a wage norm around it.

The 15th Indian Labour Conference norms

The method took its operative form at the 15th session of the Indian Labour Conference, held in New Delhi on 11 and 12 July 1957, which resolved that a need-based minimum wage be computed on five norms. These five, not Aykroyd’s diet specification alone, are what a pay commission actually prices:

• Consumption units. The standard working-class family is three consumption units per earner: the worker counts as 1, the spouse as 0.8, and two children below 14 as 0.6 between them. The needs of the spouse and the children are deliberately weighted below the earner’s.
• Food. A net intake of 2,700 calories per consumption unit per day, comprising 65 grams of protein and 45 to 60 grams of fat, drawn from Aykroyd’s standard for an adequate diet.
• Clothing. Eighteen yards per person per year, which is 72 yards a year for a family of the standard size. The 7th CPC expressed the same quantity as 5.5 metres a month.
• Housing. Rent corresponding to the minimum area provided under the government’s industrial housing schemes for the lowest income group, which the conference put at 7.5% of the total.
• Fuel, lighting and other items. These miscellaneous needs are taken at 20% of the total minimum wage.

The strength of the norms is that they specify quantities, not opinions. Given the quantities, the only variables left are the prices, the pricing date, and the two percentages, which is exactly where every later dispute arises. The retail price series the quantities are costed against is the All-India Consumer Price Index for Industrial Workers, the same Labour Bureau index whose twelve-month average fixes dearness allowance, so the minimum pay and the allowance paid on top of it derive from one source.

The Supreme Court’s sixth component

The Supreme Court added a sixth component at 25% of the wage computed from the first five. In Workmen v. Management of Reptakos Brett and Co. Ltd., reported at (1992) 1 SCC 290 and decided on 31 October 1991, the Court held that the five 15th Indian Labour Conference norms did not capture everything a worker’s family needs, and added children’s education, medical requirement, minimum recreation including festivals and ceremonies, and provision for old age and marriage.

The Court treated a wage answering all six components as the irreducible minimum, and observed that an employer with no capacity to pay it has no right to run the industry. Reptakos Brett is an industrial disputes case about an industrial wage, not a government pay case, and it binds a pay commission only through adoption rather than through precedent. The 25% it prescribes is one of the two figures the government and the staff side later differed on, because the 7th CPC applied 15% instead.

The skill factor, the seventh component

The seventh component is a skill factor of 25%, introduced by the 6th Central Pay Commission and carried forward unchanged. Its justification is structural rather than nutritional: the 6th CPC abolished Group D and merged those staff into Group C, which left the central government with no unskilled post at all, so the lowest post has to be priced as a skilled one rather than as the unskilled worker the 15th Indian Labour Conference had in mind. The 6th CPC applied about 22% on that reasoning. The 7th CPC applied 25% at Step 5 of paragraph 4.2.8.

This is the clearest illustration of why the popular name understates what is being priced. Of the seven components the 7th CPC costed, Aykroyd supplied one, the 15th Indian Labour Conference supplied four more, the Supreme Court supplied the sixth in 1991, and the 6th CPC supplied the seventh in 2008.

The arithmetic that produced Rs. 17,992.98

The seven components priced at Labour Bureau retail prices came to Rs. 17,992.98 a month as on 1 January 2016, which the 7th Central Pay Commission rounded to a minimum pay of Rs. 18,000. Paragraph 4.2.8 of the report describes the arithmetic in seven steps and the Annexure to Chapter 4.2 tabulates every line.

The quantities become a monthly family basket first. Dal is specified at 80 grams per consumption unit per day, so one unit takes 2.4 kg a month and a family of three units takes 7.2 kg. Each item is then priced at the twelve-month average of its monthly retail prices from July 2014 to June 2015, sourced from the Labour Bureau at Shimla, which is the same price basis as the dearness allowance of 119% operative from 1 July 2015. Dal is priced at Rs. 97.84 a kilogram, being the average of toor at Rs. 87.86, urad at Rs. 109.66 and moong at Rs. 96.00, giving Rs. 704.44 a month for the family. Fourteen items of food, clothing and detergent priced this way total Rs. 9,217.99.

The remaining components are expressed as percentages of the total rather than as quantities, so they are applied by division rather than addition. The Rs. 9,217.99 is divided by 0.8, so that fuel, lighting and water form 20% of the result. That total is divided by 0.85, so that marriage, recreation and festivals form 15%, and it is here that the Commission departed from the Supreme Court’s 25%. The result is increased by 25% for skill. That figure is divided by 0.97, so that housing forms 3% against the 15th ILC norm of 7.5%. The final step rolls the total from the pricing date to the implementation date: the figure stands as on 1 July 2015 when the merged multiple was 2.19, the Commission assumed dearness allowance of 125% on 1 January 2016 giving a multiple of 2.25, and 2.25 divided by 2.19 is 1.027, a step up of nearly 3%. Line 25 of the Annexure reads Rs. 17,992.98. The full line-by-line table is reproduced in the article on minimum pay.

Two of those seven steps are judgment calls and the other five are arithmetic. Every quantity in the 15th ILC norms is fixed, but the 15% at the education and medical step and the 3% at the housing step were chosen by the Commission, and moving either is what moves the answer.

The staff-side computation of Rs. 26,000

The National Council (Staff Side) of the Joint Consultative Machinery ran the same seven components and reached about Rs. 26,000, on four specific differences rather than on a general claim of inadequacy:

• Prices. Retail prices prevailing in New Delhi, Mumbai, Chennai, Kolkata, Hyderabad, Bhubaneswar, Trivandrum and Bangalore as on 1 January 2014, against the Commission’s Labour Bureau twelve-month average to June 2015.
• Education, medical and recreation. The full 25% prescribed in Reptakos Brett, against the Commission’s 15%. Had 25% been applied at that step, the Rs. 11,522.49 running total would have grossed up to Rs. 15,363.32 rather than Rs. 13,555.87.
• Housing. A share nearer the 15th ILC norm of 7.5%, against the Commission’s 3%.
• Family size. More than three consumption units, on the argument that the norms need revising to count old and dependent parents. Paragraph 4.2.6 of the report records the argument without fixing a number, and every additional unit lifts every quantity in the food and clothing basket proportionately.

The Commission answered on adequacy rather than on the arithmetic. Paragraphs 4.2.10 to 4.2.13 compare the government minimum against the industrial minimum wage and against private-sector pay, noting a study commissioned from the Indian Institute of Management, Ahmedabad, which found the total emoluments of a General Helper at Rs. 22,579 against Rs. 8,000 to Rs. 9,500 for the same role in the private organisations surveyed. The staff side’s answer is that a private-sector comparison is not a need-based computation and does not respond to the two moderations. That exchange is the whole of the minimum pay dispute, and it will be repeated before the 8th CPC.

Use across the pay commissions

The 15th Indian Labour Conference norms have been used by four of the seven Central Pay Commissions and set aside by three, so the method is a recurring option rather than a standing rule. The 1st CPC reported in 1948 and pre-dated the norms entirely, fixing a minimum of Rs. 55. The 2nd CPC made an initial assessment on the norms in 1959 and then moderated it against per capita income, settling at Rs. 80. The 3rd CPC used a modified version to reach Rs. 196 from 1 January 1973.

The 4th CPC dropped the method. It applied the growth of the total emoluments index to the 3rd CPC minimum and arrived at Rs. 750 from 1 January 1986, without pricing a basket. The 5th CPC dropped it too, using a constant relative income approach instead: it took the Rs. 750, added dearness allowance of Rs. 1,110 to reach a price-protected Rs. 1,860 as on 1 January 1996, stepped that up by 30.9% for the real growth in per capita net national product from 1986 to 1995, and got Rs. 2,440, which the government raised to Rs. 2,550 at implementation.

The 6th CPC returned to the need-based method and is the closest precedent for the 7th. It computed Rs. 5,479 from the 15th ILC norms, enhanced that by about 22% for the skill factor arising from the merger of Group D into Group C, and recommended Rs. 6,660. The government fixed Rs. 7,000. Two features of that sequence recur and are worth separating from the method itself: the government has more than once implemented a minimum higher than the one recommended, and the skill factor has been part of the computation since 2008 rather than being a 7th CPC innovation.

The column is not a like-for-like series, because the method behind the figures changed four times.

Effect on the fitment factor and the pay matrix

The minimum pay produced by the formula is the number from which the entire pay structure is scaled, which is why a nutrition specification from 1937 reaches every pay level. The 7th CPC divided the new minimum of Rs. 18,000 by the previous minimum of Rs. 7,000, itself the 6th CPC pay-band floor of Rs. 5,200 plus grade pay of Rs. 1,800, and got 2.5714, printed as 2.57. That is the fitment factor, and paragraph 5.1.27 applies it uniformly to every employee, so a person’s revised basic pay is their old basic pay scaled by the same multiple that scaled the minimum, then fixed at the equal or next higher cell.

The factor decomposes. Of the 2.57, a multiple of 2.25 merges basic pay of 1.00 with dearness allowance assumed at 125% on 1 January 2016 and does no more than preserve purchasing power. The balance of 1.1429 is the real increase of 14.29%, the figure paragraph 5.1.27 states and the Union Cabinet decision of 29 June 2016 recorded. So the Aykroyd computation delivered a real pay rise of 14.29%, the smallest of any pay commission in the series apart from the 2nd CPC’s, notwithstanding a headline multiple of 2.57.

The cells of the pay matrix were not built by applying 2.57 across the board. Each level’s entry cell was built by applying the index of rationalisation, which runs from 2.57 at Levels 1 to 5 up to 2.81 at Level 17, to that grade’s 6th CPC entry pay, and the column was then filled by successive annual increments of 3%. The formula fixes the first cell of Level 1; the index of rationalisation fixes the first cell of every other level. This is why the take-home salary of an employee at any pay level traces back to the price of a food basket in the year to June 2015.

Criticism of the calorie norm and the family size

The most substantial criticism of the 2,700-calorie norm comes from the government’s own expert committee, and it points downwards. The Expert Committee on Determining the Methodology for Fixing the National Minimum Wage, chaired by Dr Anoop Satpathy and constituted by the Ministry of Labour and Employment on 17 January 2017, submitted its report on 14 February 2019 recommending that the norm be reduced to 2,400 calories per adult per day, with protein of at least 50 grams and fat of at least 30 grams. Its reason was occupational: the share of workers engaged in heavy manual work has fallen and the share in moderate and sedentary work has risen since 1957, so the 1957 calorie requirement overstates current need.

The same committee pushed the family size in the opposite direction, recommending 3.6 consumption units against the three of the 15th Indian Labour Conference, on the household sizes recorded in the latest National Sample Survey. It also recommended that the consumption basket be reviewed every five years subject to the availability of National Sample Survey consumer expenditure data, which is a criticism of the norms’ age rather than of their content: the quantities the 7th CPC priced in 2015 were fixed in July 1957 and had not been revised in the intervening fifty-eight years.

The committee’s own figure was Rs. 375 a day, or Rs. 9,750 a month, as of July 2018, with an additional house rent element averaging up to Rs. 55 a day for urban workers. That is a national minimum wage for workers generally and not a government pay figure, and the government has not implemented it.

Two further criticisms recur and neither has been answered by an order. The norms carry no regional variation, so the same basket is priced at one national average although rents and food prices differ by a wide margin between cities. And the weighting of the spouse at 0.8 and two children at 0.6 between them reflects a 1957 view of a household that has not been revisited.

Coverage: where the formula applies

The formula binds nobody. It is a method a pay commission chooses to use, and what binds is the figure the government notifies afterwards: in the present case Rs. 18,000, prescribed as the Level 1 entry cell by the Central Civil Services (Revised Pay) Rules, 2016, notified as G.S.R. 721(E) on 25 July 2016. A commission is free to set the method aside, and the 4th and 5th CPCs did.

No state government is bound by the central computation. The Central Pay Commission fixes the pay of central government employees alone, and each state appoints its own state pay commission, some adopting the central scales directly and others framing their own against state finances. The 15th Indian Labour Conference norms are available to a state commission on the same footing, because those norms were adopted for wage fixation generally rather than for the central government specifically.

The statutory minimum wage is a separate track with a shared ancestor. The need-based framework the 15th Indian Labour Conference adopted in July 1957 was formulated for the industrial minimum wage, and the pay commissions borrowed it, which is why the same 2,700 calories, the same 72 yards of clothing and the same three consumption units appear on both sides. The statutory floor is now governed by the Code on Wages, 2019 (Act 29 of 2019), which consolidated the Minimum Wages Act, 1948 and three other wage statutes and whose Section 9 empowers the Central Government to fix a floor wage for workers, with different floor wages permitted for different geographical areas. The four labour codes were brought into force on 21 November 2025, with only certain provisions of the Code on Wages notified at that stage and the rest to follow as the rules are finalised. The two figures are far apart in practice, and no employer outside the central government is bound by Rs. 18,000.

Effect on pension

The formula sets the floor under every central government pension, through a fixed ratio rather than a separate computation. The minimum pension is Rs. 9,000 a month, which is 50% of the minimum pay of Rs. 18,000, and the same Rs. 9,000 is the floor for family pension. No pension basket is priced and no separate need-based exercise is run for pensioners: the 7th CPC computed a minimum pay and halved it.

The consequence is that a change in the calorie norm, the family size or the two moderated percentages moves the pension floor by the same proportion as it moves the pay floor. On top of the Rs. 9,000, a pensioner draws dearness relief at the same percentage as serving employees draw dearness allowance, so the real value of the floor is maintained between pay commissions in the same way and by the same index.

The formula is run once a decade, not annually

The basket is priced once per pay commission and the result is then frozen, which is why the minimum pay has been Rs. 18,000 since 1 January 2016 despite a decade of price movement. Between commissions the real value is protected by dearness allowance, revised with effect from 1 January and 1 July each year from the twelve-month average of the AICPI-IW, rather than by repricing the food basket at current retail prices.

The two mechanisms use the same underlying price data and do different jobs. The Aykroyd computation fixes the level of basic pay in absolute rupees at one date. Dearness allowance is a percentage of that basic pay and does no more than restore what inflation has taken since. Neither raises real basic pay between commissions, which is the structural reason a pay commission cycle produces a step change rather than a gradual rise, and the reason employee expectations concentrate on the fitment factor.

Bearing on the 8th Central Pay Commission

No 8th CPC minimum pay exists and the method it will use has not been announced. The 8th Central Pay Commission was constituted by Ministry of Finance Resolution F. No. 01-01/2025-E.III(A) dated 3 November 2025 under Justice Ranjana Prakash Desai, with 18 months to report, which expires on 3 May 2027, so Rs. 18,000 remains the minimum pay in force until revised rules are notified.

What the exercise will look like is predictable in shape even though the answer is not. If the Commission follows the 7th CPC, it will price the same seven components at current Labour Bureau retail prices, gross the basket up through the same steps, and roll the result forward to the implementation date it recommends. The one structural difference from 2016 is the size of that last step: dearness allowance stood at 119% at the 7th CPC’s pricing date and was projected at 125% at implementation, whereas it now stands at 60%, so the neutralisation multiple is about 1.60 rather than 2.25. A similar real increase would therefore produce a visibly smaller headline fitment factor than 2.57.

The figures in circulation are demands and projections, not decisions. The Staff Side of the National Council (JCM) sought a minimum pay of Rs. 69,000 and a fitment factor of 3.833 in its memorandum of 14 April 2026, the 3.833 being Rs. 69,000 divided by Rs. 18,000, along with a five-unit rather than three-unit family basis for the need-based computation. The 2.86 that circulates widely, giving a minimum of about Rs. 51,480, is an earlier verbal staff-side position superseded by that written demand rather than an analyst projection. The 7th vs 8th Pay Commission comparison separates what is settled from what is not.

Related Articles

• Minimum pay
• Fitment factor
• Pay matrix
• Index of rationalisation
• 7th Central Pay Commission
• 8th Central Pay Commission
• 6th Central Pay Commission
• 5th Central Pay Commission
• Central Pay Commission
• 7th vs 8th Pay Commission
• National Council (JCM)
• Dearness allowance
• Dearness relief
• AICPI-IW
• Minimum and maximum pension
• Family pension
• Code on Wages, 2019
• Minimum wage in India
• Grade pay
• Pay band
• Annual increment
• Pay fixation
• Salary by pay level
• Take-home salary of central government employees
• House rent allowance
• Children education allowance
• Central Government Health Scheme
• Central government employees in India
• CCS (Revised Pay) Rules, 2016
• 7th CPC salary calculator
• Salary by pay level calculator

External references

• Seventh Central Pay Commission report
• Ministry of Labour and Employment
• Labour Bureau
• Department of Expenditure
• India Code, Code on Wages, 2019
• Ministry of Statistics and Programme Implementation