You can do it. You can reduce the PF qualifying salary to Rs 15,000. In Marathwada Gramin Bank Karamchari Sanghatan Vs Management of Marathwada Gramin Bank, the Supreme Court has ruled that the EPF cannot demand a contribution on an amount of wages above Rs 6,500. Now this 6,500 ceiling may be replaced by Rs 15,000. In the Marathwada Bank's case, the Bank was earlier contributing on actual salary but later decided to restrict it to Rs 6,500. The Union opposed, and the EPFO also objected, saying that as per Section 12 of the EPF & MP Act, an employer cannot reduce the salary of employees so that the employer's liability towards PF can be reduced. But the court said that the reduction of PF contributing salary to a level equal to Rs 6,500 will not attract Section 12 of the Act, and EPFO cannot demand any contribution on salary above Rs 6,500. The wages ceiling having increased to Rs 15,000, the same can be applied in your case, and you can very well reduce the PF qualifying salary to Rs 15,000 with the consent of employees.
However, if the cost-to-company is equal, whether we should adopt such a step or not is my question. Contributing a higher amount to PF is beneficial to the employees anyway because of various reasons. The interest that EPFO pays is anyway higher than what one can gain from other sources of investments. There is a verdict from the Apex Court accepting the order of the Kerala High Court that an employee is eligible to get a pension based on actual PF contribution. It is true that this verdict is being reviewed by the Court. If, by chance, the review court also stands in favor of the Kerala High Court decision, then your employees would get the benefit of a higher pension, that is, a pension based on their actual PF contribution, and that would be a lifelong benefit. Therefore, if the cost-to-company is the same, I would say that you should continue to contribute to PF on the actual salary.