The Fiscal Problem Created by Demographic Success

India spent decades trying to solve a problem that seemed almost impossible to reverse: rapid population growth.

For some States, that effort succeeded earlier than elsewhere. Fertility fell, families became smaller, survival improved, education expanded and the share of children in the population began to decline.

That success is now producing a less obvious problem.

The question is no longer simply how many people a State has. It is increasingly what kind of population it has, what obligations that population creates, and whether its fiscal system can adapt as the age structure changes.

The same transformation that reduces demographic pressure can eventually increase pressure on public finances.

WHEN THE AGE STRUCTURE CHANGES

The demographic transition does not end when fertility falls. It changes the composition of society.

States that reached low fertility earlier now have a different age structure from States where fertility remains relatively high. The gap remains visible even though fertility has declined across India as a whole.

The National Family Health Survey-5, covering 2019-21, puts India’s total fertility rate at 2.0, while significant differences remain across States. Bihar recorded 3.0, Meghalaya 2.9 and Uttar Pradesh 2.4. The transition is therefore no longer a simple divide between a low-fertility South and a high-fertility North; fertility has fallen substantially across the country, even as the pace and level of transition continue to differ.

These differences matter because fertility does more than determine population size. It gradually changes the ratio between people who are working, people who are children and people who are elderly.

A State with fewer children today may eventually have a much larger elderly population relative to its working-age population.

That changes what government spending needs to accomplish. A younger population creates enormous demands for schools, maternal care and child nutrition. An ageing population shifts some of that demand towards healthcare, pensions, social protection and long-term care.

The fiscal problem is therefore not that population stabilisation was a mistake.

It is that demographic success changes the expenditure structure that governments must finance.

THE FISCAL COST OF SUCCESS

The demographic transition becomes fiscally significant because States enter it with very different revenue and expenditure structures.

State governments remain responsible for large areas of public provision, including health, education, agriculture, law and order and local government. At the same time, much of the country’s tax-raising capacity is concentrated at the Union level.

That means demographic change does not occur on an empty fiscal balance sheet. It interacts with commitments that governments have accumulated over decades.

Kerala provides a particularly clear example.

Its development model involved sustained public investment in social sectors. Between 2020 and 2023, per-capita State government social expenditure in Kerala was about 30% higher than the average for Indian States. Its own-tax revenue per capita was also 1.5 times the average for States and Union Territories.

The difficulty is that a large social-service architecture creates continuing expenditure obligations even after the conditions that produced it have changed.

Only about 10% of Kerala’s budget expenditure was directed towards capital expenditure in the period examined. Around a fifth went towards salaries, while pensions accounted for 15.3% and interest payments for 16.5%.

Those figures matter, but they should not be read simply as evidence of waste or fiscal failure.

The teachers, nurses, doctors and other public employees represented in that expenditure were part of the institutional system through which Kerala built its social outcomes. The pension bill similarly reflects commitments accumulated through decades of public employment.

The fiscal problem therefore has two dimensions at once.

Existing commitments reduce the room available for new investment. Yet some of those same commitments helped create the human-development conditions that changed the State’s demographic structure.

That is the central fiscal paradox of demographic success.

THE PROBLEM IS NOT AGEING ALONE

Ageing does not automatically produce a fiscal crisis.

The pressure depends on what happens around it.

If productivity rises, incomes increase and the tax base expands, a State can absorb a larger elderly population more easily. If healthcare systems become more efficient, the cost of ageing can also be managed differently.

The difficulty arises when demographic change combines with already high committed expenditure, limited revenue flexibility and slower expansion of the working-age population.

Then the fiscal equation becomes tighter.

A growing working-age population can expand the tax base while supporting a smaller dependent population. A more rapidly ageing population eventually reverses part of that advantage.

The issue is therefore not simply more old people.

It is the interaction between:

age structure → labour force → revenue capacity → pension and healthcare obligations → fiscal flexibility.

This is why demographic change has to be treated as a fiscal variable rather than merely a population statistic.

PENSIONS MAKE THE TIMING MATTER

Pension policy makes the demographic problem particularly difficult because the fiscal effect of a decision can emerge long after the decision itself.

A change in pension arrangements may initially affect the government’s finances only modestly. The larger liability can appear years later, when a much larger cohort of employees reaches retirement.

This is one reason the pension debate has an intergenerational dimension. The Reserve Bank of India has noted that the immediate financial impact of returning to an older pension structure could be limited because existing retirees would initially receive the benefits, while the more substantial burden would emerge when employees recruited under newer arrangements eventually retire.

The timing therefore matters as much as the nominal size of the commitment.

Tamil Nadu’s Tamil Nadu Assured Pension Scheme, or TAPS, illustrates the newer generation of pension choices. The scheme, effective from January 1, 2026, involves a 10% employee contribution with at least a matching government contribution. It also carries a one-time expenditure of ₹13,000 crore and annual government contributions estimated at about ₹11,000 crore.

The significance goes beyond the design of one pension scheme.

As the demographic structure changes, States have to make decisions about how much of today’s fiscal space should be committed to future social-security obligations.

That is increasingly a question of fiscal planning, not simply welfare policy.

THE NORTH-SOUTH DIVIDE IS ALSO A DEMOGRAPHIC DIVIDE

India’s demographic transition is uneven enough to create a second complication: different States are moving through different stages of the same transition.

Southern States reached low fertility earlier. Several northern States still have younger and faster-growing populations.

That creates different policy pressures.

A younger State must create jobs, expand education and absorb a rapidly growing working-age population.

An ageing State must maintain productivity while financing a larger population with greater healthcare and social-security needs.

Neither problem is inherently better or worse. But they require different fiscal choices.

The political difficulty is that India finances these different demographic realities through a common federal system.

This matters because the demographic transition changes not only State expenditure but also the political economy of fiscal transfers.

States that stabilised their populations earlier can experience slower population growth even as their economies and tax bases expand. At the same time, population remains an important variable in the distribution of public resources.

The Sixteenth Finance Commission’s current devolution formula illustrates that demographic change is already part of the institutional framework. Its criteria give 17.5% weight to the 2011 population and 10% to demographic performance, alongside income distance, area, forest cover and other criteria.

That creates an unusual tension between where economic activity is generated, where people live, and where future expenditure pressures are likely to emerge.

The demographic transition therefore complicates the idea that fiscal transfers can be designed around a single notion of need.

MIGRATION CAN ABSORB PART OF THE PRESSURE

There is, however, another mechanism operating across States: migration.

A State with low fertility does not necessarily have to rely only on its own population to supply labour.

Workers move.

The economic structure of southern States creates demand for labour in construction, manufacturing, services and other occupations. Workers from States with younger populations can move towards these opportunities.

This creates a partial demographic adjustment mechanism.

The labour force of a low-fertility State can therefore be supplemented by migration even when its resident population is ageing.

But migration does not erase the fiscal problem.

A migrant worker can expand the effective labour supply without necessarily eliminating the State’s existing pension, healthcare and ageing-related obligations. Nor does migration automatically resolve questions of who provides housing, urban infrastructure, public healthcare and other services.

Migration can therefore alter the labour equation without cancelling the demographic transition.

The two processes can coexist.

A State can simultaneously become older and attract younger workers.

That is increasingly likely to become an important feature of India’s regional economy.

WHEN DEVELOPMENT CREATES A NEW KIND OF FISCAL PRESSURE

The deeper lesson is that development does not simply reduce problems. It changes them.

A poor State with high fertility faces the immediate challenge of providing education, healthcare, nutrition and employment for a large young population.

A State that succeeds in improving these outcomes eventually faces a different set of pressures.

Its children become adults. Its families become smaller. Its workforce ages. Its pension obligations accumulate. Its healthcare requirements change.

Its government must maintain the institutions that produced the original gains while finding resources for the next stage of demographic change.

This is why committed expenditure cannot be judged in isolation.

Cutting expenditure can create fiscal space, but cutting the wrong expenditure can also weaken the human-capital base that supports future productivity. Protecting every existing commitment, on the other hand, can leave too little room for investment.

The real challenge is the composition and timing of expenditure.

A State entering an ageing phase needs fiscal space not because its earlier development strategy failed, but because that strategy has moved it into a different economic stage.

THE NEW FISCAL EQUATION

For decades, India’s development debate treated population stabilisation largely as a demographic objective.

The next phase requires a broader understanding.

The important question is no longer simply whether States are adding people faster or slower.

It is whether their economic capacity is evolving quickly enough to match the changing obligations created by their population structure.

That is a different problem.

A State can have a smaller population growth rate and still face greater fiscal pressure.

It can have a higher-income population and still face large pension and healthcare commitments.

It can have strong human-development outcomes and still struggle to create enough fiscal space for the next generation of infrastructure and productivity-enhancing investment.

Demographic success, in other words, does not produce a permanent fiscal dividend.

It produces a transition.

And that transition changes the balance between people who generate revenue, people who require public services, and the commitments governments have already made to both.

India’s States are now entering different parts of that transition at different speeds.

The resulting fiscal problem is not that some States have become too old.

It is that the fiscal system built for a younger India must increasingly operate in a country whose States are ageing at very different rates.

That may become one of the defining economic challenges of India’s next stage of development.