> ## Documentation Index > Fetch the complete documentation index at: https://human-resource-docs.ha-consultancy.com/llms.txt > Use this file to discover all available pages before exploring further. # Leave Deduction Rules > Configure per-leave-plan salary deduction rules that reduce specific salary components — basic, transport, housing — when an employee takes unpaid leave. Leave Deduction Rules let you say "when an employee is on this type of leave, deduct *N%* from this specific salary component for every day of leave taken." A common use is: when on **Unpaid Leave**, deduct 100% of **Basic Salary** and 100% of **Transportation Allowance**, but leave **Housing Allowance** intact. Rules are configured per **Leave Config** (per leave plan, not per leave type) — so the same leave type can have different deduction profiles for different employee tiers. ## When the rules are evaluated During the monthly salary calculation (`Calculate Monthly Salary HAC`, Codeunit `70003107`), the leave-management codeunit (`Leave Mng HAC`, Codeunit `70003112`) iterates every leave journal entry for the month and applies the matching rules: ``` deduction = Salary Component Amount × (Deduction Percentage / 100) × Number of Days on Leave ``` The deduction is added to the **Salary Employee Breakdown** with `Type = Leave Deduction`. It appears as a negative line on the payslip preview and reduces the employee's net pay. ## Prerequisites A deduction rule will only ever apply if the leave plan permits it. Two layers gate the behaviour: 1. **Leave Type Config → `Has Deduction Rules`** — turn this on for the leave type that should be deductible (e.g. Unpaid Leave). Until this is checked, the **Leave Deduction Rules** subform on Leave Config is hidden. 2. **Leave Config → `Ability to non-deduct`** — when ticked, the engine **skips** the rule entirely for that plan, even if rules are configured. Use this on plans where you want to disable deduction without deleting the rows. ## Walkthrough ### 1. Enable deduction on the leave type 1. Open **Tell Me** → **Leave Type Config List**. 2. Open the leave type (e.g. `UNPAID`). 3. Tick **Has Deduction Rules**. 4. Close. ### 2. Add rules to the leave plan 1. Open **Tell Me** → **Leave Config List**. 2. Open the leave plan whose deduction profile you want to define. 3. Scroll to the **Leave Deduction Rules** part — it now appears because step 1 enabled it. 4. Add one line per salary component to deduct: | Field | Notes | | -------------------- | --------------------------------------------------------------------------------------------------------------------- | | Salary Type | A value from your Salary Type list (e.g. `Basic Salary`, `Transportation Allowances`). Must exist or insertion fails. | | Deduction Percentage | A decimal between 0 and 100. `100` means deduct the full daily share of that component for each day on leave. | | From Day / To Day | Optional banded percentages — see below. | The engine enforces **one rule per (Leave Config, Salary Type)** pair. Trying to add a duplicate raises *"A deduction rule for this salary type is already configured for this leave type."* ### 3. Verify Run a payslip preview for an employee who has time on the matching leave plan during the period. You should see negative `Leave Deduction` lines in the breakdown, one per Salary Type rule. ## Banded deductions (From Day / To Day) The `From Day` / `To Day` columns let you scale the percentage by leave duration. Typical setup: | From Day | To Day | Deduction Percentage | | -------- | ------ | -------------------- | | 1 | 5 | 0 | | 6 | 15 | 50 | | 16 | 999 | 100 | This reads as: "first five days of leave free, days 6–15 deduct 50%, beyond that deduct fully." Leave both columns at zero if you don't need banding — the percentage then applies uniformly to every day. ## Common pitfalls | Symptom | Cause | | ------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------- | | The **Leave Deduction Rules** section is invisible on Leave Config | `Has Deduction Rules` is off on the parent Leave Type Config | | Rules exist but no deduction appears on the payslip | `Ability to non-deduct` is ticked on the Leave Config, or the salary package has no item matching the Salary Type in the rule | | *"The selected salary type does not exist."* | The Salary Type entered isn't in **Salary Type List** — open Salary Type List and add it first | | Deduction is twice what you expect | A rule exists for both the leave plan and the leave type independently — review the subform for the active plan | ## Object reference | Object | ID | Notes | | --------------------------------------- | -------- | ------------------------------------------------------------------------- | | Table `Leave Deduction Rule HAC` | 70003148 | Stores the rules; PK = `Leave Config Code` + `No.` | | Table `Leave Type Config HAC` | 70003123 | Field 4 — `Has Deduction Rules` — is the master switch | | Table `Leave Config HAC` | 70003124 | Owns the rules via the subform; `Ability to non-deduct` overrides them | | Page `Leave Ded. Rule Subform HAC` | 70003141 | The subform shown inside Leave Config | | Codeunit `Leave Mng HAC` | 70003112 | Validates rules on insert and evaluates them in `CalculateLeaveDeduction` | | Codeunit `Calculate Monthly Salary HAC` | 70003107 | Calls into `Leave Mng HAC` during payslip generation | The standalone `Deduction Setup HAC` table (Tab `70003131`) is a legacy structure with no page and no consumer in the current codebase. It is reserved for future use and does **not** affect payroll. The active deduction surface is `Leave Deduction Rule HAC` as described above. ## Related pages * [Leave management](/features/leave-management) — leave types, plans, and request flow * [Payroll setup](/features/payroll-setup) — salary types and the components rules can target * [First-Time Configuration](/getting-started/configure) — high-level setup overview