India has just made one of its biggest changes to the Goods and Services Tax since its introduction.
On September 3, the GST Council approved a simplified structure centred on 5% and 18% rates, replacing the previous four-tier structure for most goods and services. A special 40% rate was retained for selected luxury and demerit goods. The new rates were scheduled to take effect on September 22.
The headline is tax simplification.
The economic argument is consumption.
GST cuts reduce the tax component of the final price for thousands of products. Everyday goods such as toothpaste, shampoo and household products were moved to the 5% slab, while items such as air conditioners and televisions moved from 28% to 18%. Individual life and health insurance policies were also exempted from GST.
That matters because India's growth model depends heavily on domestic demand.
If consumers spend more because products become cheaper, companies may sell more. Higher sales can increase production, which can increase demand for labour and investment.
In theory, the government loses tax revenue per unit but gains some of it back through a larger tax base and stronger economic activity.
That is the bet.
But there is a catch.
A tax cut does not automatically become a price cut.
Businesses may pass the entire reduction to consumers. They may pass only part of it through. Or they may use the additional margin to strengthen their balance sheets.
The size of the eventual consumption response will therefore determine whether the reform produces a meaningful growth effect.
There is also a fiscal cost.
Reuters estimated that the changes could cost the central and state governments around ₹480 billion, or approximately $5.5 billion, in revenue.
That makes the policy a calculated trade-off.
The government is effectively giving up some revenue today in the hope that stronger consumption and economic activity generate enough benefits tomorrow.
For consumers, the immediate effect could be lower prices on a wide range of goods.
For businesses, the simpler structure could also reduce compliance costs and classification disputes.
But the reform's success should not be judged by how many products received a lower tax rate.
It should be judged by what happens next to household consumption, business sales and government revenue.
India has just made consumption cheaper on paper. The real test begins on September 22: will households actually spend the money they save?
