The 41% Question: Why the Size of the Divisible Pool Matters More Than the Headline

A percentage can remain unchanged while the amount it represents changes substantially.

That is the problem hidden inside 41%.

The Sixteenth Finance Commission has retained the States’ share in the divisible pool of Union taxes at 41% for 2026–31. On its own, the number appears precise. But it does not tell us how much of the Centre’s total tax revenue actually reaches the pool to which that percentage is applied.

The more useful question is therefore not simply whether States receive 41%.

It is:

What is the size of the pool from which that 41% is calculated?

That distinction matters because States do not receive 41% of the Centre’s entire gross tax revenue. They receive 41% of the divisible pool — the portion of Union tax revenue that is constitutionally shareable with the States.

And that pool does not necessarily move in step with the Centre’s total tax collections.

Start with the base, not the percentage

The easiest way to see the distinction is through a simple calculation.

Suppose the Centre collects ₹100 in taxes.

If ₹95 forms part of the divisible pool, a 41% State share produces ₹38.95.

But if the Centre still collects ₹100 and only ₹80 enters the divisible pool, the same 41% produces ₹32.80.

Nothing has changed in the headline percentage.

The amount available to States has.

This is why the vertical-devolution debate contains two separate questions. One concerns the proportion of the divisible pool assigned to States. The other concerns the proportion of the Centre’s total tax revenue that actually enters that pool.

They should not be treated as the same variable.

The composition of Union tax revenue changes the calculation

The divisible pool does not include every form of Union tax revenue. Cesses and surcharges are treated differently from the taxes that constitute the shareable pool.

That creates a second layer to the 41% question.

The 16th Finance Commission’s assessment records that the divisible pool, as a proportion of gross tax revenue, averaged 89.2% during the 13th Finance Commission period, declined to 82.1% during the 14th, and fell further to 78.3% during the 15th Finance Commission period.

The 41% figure therefore has to be read alongside the changing size of its underlying base.

The composition of tax collections illustrates why.

Between 2013 and 2019, approximately ₹93–95 of every ₹100 collected by the Centre came through taxes and duties forming part of the divisible pool, while around ₹5–7 came through cesses and surcharges. By 2021–22, the corresponding figures were about ₹86.5 and ₹13.5. For 2025–26, the estimate was around ₹89 and ₹11 respectively, excluding the GST compensation cess from this particular calculation.

The absolute figures point in the same direction.

Cess collections, excluding GST compensation cess, rose from ₹44,688 crore in FY15 to ₹3,52,650 crore in FY22, while surcharge collections increased from ₹15,702 crore to ₹40,758 crore. The FY26 estimates were around ₹2,51,206 crore for cesses and ₹1,72,500 crore for surcharges.

These figures do not mean that the shareable pool disappeared.

They show something more specific: the relationship between gross tax revenue and the revenue entering the divisible pool has changed.

That is the part that a headline percentage cannot reveal.

Why the 41% number can therefore be misleading

Consider two situations.

In the first, 90% of gross tax revenue enters the divisible pool. A 41% State share is then equivalent to 36.9% of gross tax revenue.

In the second, only 80% enters the pool. The same 41% becomes equivalent to 32.8% of gross tax revenue.

The statutory percentage is identical in both cases.

The effective relationship with gross tax revenue is not.

This is why a debate centred exclusively on whether the State share should be 41%, 45% or 50% can leave out an important part of the fiscal equation.

A change in the percentage affects how the divisible pool is divided.

A change in the composition of Union tax revenue affects how large that pool is before the division takes place.

The two mechanisms operate at different stages.

Cesses and surcharges complicate the picture

The existence of cesses and surcharges also cannot be reduced to a simple argument that every rupee raised through them represents a rupee unavailable to States.

The Union has expenditure responsibilities of its own, including areas such as infrastructure, defence and emergencies. The Finance Commission material records the argument that the constitutional framework does not impose a simple ceiling on the use of these instruments.

There is therefore a fiscal rationale for the Union to use them.

But there is also an institutional consequence.

When a larger proportion of Union revenue is collected outside the divisible pool, the Finance Commission’s vertical devolution mechanism operates over a narrower base.

That does not by itself establish that the Union has acted unlawfully. Nor does it prove that cesses and surcharges alone explain State fiscal stress.

It does, however, mean that the meaning of 41% depends partly on what happens to the revenue base underneath it.

The Finance Commission’s own numbers show why the distinction matters

The 16th Finance Commission also recorded the changing relationship between the shareable and non-shareable components.

The non-shareable portion of revenues rose from 1.1% of GDP in 2011–12 to 2.2% in 2023–24, while the divisible pool moved from 9.1% to 9.4% of GDP.

At the same time, the Commission cautioned against overstating the effect. The claim that cesses and surcharges had “almost wiped out” the increase associated with the 14th Finance Commission was not supported by the data.

This is an important qualification.

The shareable pool did not vanish. It remained substantial.

The issue is that the non-shareable component expanded significantly relative to its earlier position, changing the relationship between gross tax revenue and the pool over which vertical devolution operates.

That leaves several possible policy approaches.

One is to alter the percentage allocated to States.

Another is to change the composition of Union taxation so that a greater portion enters the divisible pool.

A third is to retain the existing percentage while attempting to reconcile the Union’s fiscal requirements with the States’ demand for predictable and untied resources.

The 16th Finance Commission retained the 41% rate and did not recommend a general cap on cesses and surcharges. It instead suggested a possible arrangement under which States could accept a smaller share of a larger divisible pool if a substantial portion of cesses and surcharges were shifted into regular taxes.

The significance of that proposal is that it treats the size of the pool and the percentage allocated from it as separate policy levers.

Why the denominator matters to States

For States, this is not simply an accounting distinction.

State governments carry substantial expenditure responsibilities in areas such as health, education, agriculture, local infrastructure and public services. Their fiscal planning therefore depends on the amount and predictability of resources available to them.

A fixed percentage applied to a changing base can produce different fiscal outcomes over time.

This also explains why demands for a higher vertical-devolution share cannot be understood only as a demand for a larger percentage.

Several States sought an increase from 41%, with some demanding 50% and others advocating intermediate levels.

But changing the percentage does not automatically resolve the question of what happens to the underlying pool.

The Centre can point to the fact that States receive 41% of the divisible pool.

States can point to the fact that the divisible pool itself represents a different proportion of the Centre’s total tax revenue than it did in earlier periods.

Both statements can be factually correct.

The disagreement therefore partly concerns which denominator should be used to understand the fiscal relationship.

Three numbers must be kept separate

The fiscal debate becomes clearer when three different quantities are distinguished.

Gross tax revenue is the total tax revenue collected by the Centre.

The divisible pool is the portion of relevant Union tax revenues that is shareable with States.

State devolution is the percentage of that divisible pool assigned to States.

These are not interchangeable.

If the divisible pool equals 80% of gross tax revenue, and States receive 41% of that pool, their devolution is equivalent to 32.8% of gross tax revenue.

If the divisible pool equals 90%, the same 41% is equivalent to 36.9%.

The percentage remains unchanged.

The fiscal relationship does not.

This distinction is especially important because percentages are easy to communicate, while the composition of the underlying base is less visible.

But the divisible pool is only one part of State finances

It would be equally misleading to treat the size of the divisible pool as a complete explanation of State finances.

States receive resources through other channels, including Finance Commission grants and other transfers. The 16th Finance Commission reports that average Finance Commission devolution plus grants amounted to 32.5% of gross tax revenue under the 13th Finance Commission, 39.4% under the 14th and 37.7% under the 15th.

Consequently, a smaller divisible pool does not automatically imply an equivalent decline in every State’s total transfers.

Nor does it establish that State borrowing is caused by the size of the divisible pool.

State fiscal outcomes also depend on their own revenues, expenditure choices, debt, pensions, subsidies, public enterprises and other factors.

The divisible pool is therefore an important component of the fiscal architecture, but not the whole of it.

The larger question is about transparency in the fiscal base

This is where the 41% debate acquires a broader significance.

A percentage gives the appearance of precision.

But the percentage operates on a base.

If the base changes materially, the same percentage can represent a different fiscal outcome.

The Finance Commission’s vertical devolution therefore cannot be understood only by looking at the rate written in the recommendation.

The composition of Union tax revenue determines how much reaches the stage at which that rate is applied.

That makes the divisible pool an important, and often less visible, layer of fiscal federalism.

The debate over vertical devolution is consequently not only about how much of the pool States should receive.

It is also about what constitutes the pool in the first place.

A growing economy can produce a larger divisible pool even when the share of gross tax revenue entering it declines. Conversely, higher gross tax collections do not automatically translate into a proportionately larger shareable base.

The headline percentage can therefore stay constant while the underlying fiscal relationship changes.

The 41% question

The Sixteenth Finance Commission has kept the States’ vertical-devolution share at 41% for 2026–31.

That number is important.

But by itself, it does not tell us how much of the Centre’s total tax revenue is available for distribution.

It is a share of a shareable base.

The size of that base depends partly on the structure of Union taxation and on how much revenue is raised through instruments that do not enter the divisible pool.

That is why the most useful question is not simply:

Are States getting 41%?

It is:

How large is the divisible pool relative to everything the Centre collects?

Once that question is asked, the fiscal-federalism debate becomes more precise.

The issue is no longer merely the percentage printed in the Finance Commission’s recommendation.

It is the relationship between the percentage and the base to which it applies.

That is the real significance of the 41% question.