Dear, leave encashment is provided to employees only if there are accumulated PL/EL in their leave account. Permissible leave encashment shall be governed by the policy of your company. Most companies don't allow the accumulation of leaves for more than 3 years. If it exceeds 3 years, either the excess leaves may get lapsed automatically or may be encashed on your request. However, it varies from company to company. Encashment is calculated based on the average salary of the last 10 months. Here, salary means Basic + DA + any commission as a % of turnover.
Please note, leave encashment will be settled with the full and final amount and is taxable in case of resignation and non-taxable in case of retirement/superannuation.
Regards.