## Taxable Annual Accretion on Excess Employer Contribution
When an employer's contribution to Recognised Provident Fund (RPF), NPS and Approved Superannuation Fund (ASF) exceeds the prescribed ceiling, two things become taxable as perquisites:
1. The excess contribution itself — taxable under section 17(2)(vii).
2. The annual accretion (interest/return) earned on that excess — taxable under section 17(2)(viia).
This lesson deals with the second part: computing the taxable accretion using the Rule 3B formula.
### The Formula
$$\text{Taxable Perquisite} = (PC + PC1) \times R + (PC1 + TP1) \times R$$
where R = I ÷ Favg (the average rate of return during the year).
### Decoding each term
| Symbol | Meaning |
|---|---|
| PC | Excess employer contribution to RPF, NPS and ASF during the Current Previous Year (CPY) |
| PC1 | Excess employer contribution for previous years (on or after 1 Apr 2020) other than the current PY — i.e., the opening balance of excess contributions as on 1/4 of the relevant PY |
| TP1 | Aggregate taxable perquisite under section 17(2)(viia) for previous years (on or after 1 Apr 2020) other than the current PY — i.e., the preceding years' taxable accretion already added |
| I | Income (amount or aggregate) accrued during the CPY in RPF, NPS and ASF |
| Favg | Fund Average Balance during the CPY = (Aggregate Fund Balance on first day + Aggregate Fund Balance on last day) ÷ 2 |
| R | I ÷ Favg = average rate of return during the year |
> Aggregate Fund Balance = total balance to the credit of RPF + NPS + ASF together.
### The Capping Rule (important!)
If (TP1 + PC1) exceeds the Aggregate Fund Balance on the first day of the CPY, then the excess is ignored when computing the aggregate of TP1 and PC1.
This prevents the carried-forward taxable amounts from being inflated beyond the actual opening fund balance.
### Why this exists
The provision ensures that high earners cannot shelter unlimited returns inside tax-favoured retirement funds. Only the return attributable to the excess (above the limit) contribution is taxed — and it is taxed year after year as it accrues.