# Basis of Charge – Section 15
## Basic rule
Salary is chargeable to tax on a due basis or receipt basis, whichever is earlier. This prevents double taxation and ensures salary is taxed at the first trigger point.
## Special situations
### Advance salary
- Taxed in the year of payment (receipt), even before it becomes due.
- Cannot be taxed again when it later becomes due.
- Relief under Section 89 is available (to mitigate higher-slab impact).
### Arrears of salary
- If already taxed on due basis, cannot be taxed again when paid.
- Arrears must ordinarily be charged on due basis; but where this is not possible, they are taxed in the year of receipt.
- Relief under Section 89 is available.
### Advance against salary
- An advance adjusted against future salary (a loan against future pay).
- NOT taxable on receipt — it is a loan, not income, at that point.
### Loan from employer
- A loan repayable in instalments is likewise NOT taxable on receipt.
## Distinguish carefully
| Item | Nature | Taxable on receipt? | Relief u/s 89? |
|---|---|---|---|
| Advance salary | Salary paid early | Yes | Yes |
| Advance against salary | Loan vs. future pay | No | – |
| Loan from employer | Loan | No | – |
| Arrears (taxed on due) | Already taxed | No (no re-tax) | Yes (when on receipt) |