---
title: "Splits: Break One Record into Many"
description: "Create a Split enrichment that replaces a matching record with multiple lines, like payroll into wages, tax, and super, with amounts that always add up exactly."
section: "Enrichments"
canonical: "https://banksync.io/docs/enrichments/splits"
---

A **Split** enrichment replaces a matching record with several smaller ones whose amounts add up exactly to the original. The classic case is payroll: one $8,000 bank debit that your books need as wages, withheld tax, and superannuation on three separate lines, each with its own category. Other favorites: a fixed owner-draw carve-out, or a revenue share divided by percentage.

You define **when** to split with the same condition builder Rulesets use (for example, Description contains PAYROLL), and **how** to split with 2 to 10 lines.

## Split lines

Each line takes either a **percentage** of the parent amount or a **fixed amount** — and exactly **one line must be the remainder**, which absorbs whatever the other lines leave over (including rounding). Each line can also set values on the child it produces, most usefully **Category**.

A payroll example:

| Line     | Allocation | Sets Category  |
| -------- | ---------- | -------------- |
| Wages    | remainder  | Wages          |
| PAYG tax | 22%        | Taxes          |
| Super    | 12%        | Superannuation |

> **The amounts always add up — exactly:** 'Child amounts are computed to the cent and always sum exactly to the parent. Percentages that produce fractional cents round per line — half-cent ties go to the even cent, the same banker’s rounding accounting systems use, so a repeating split does not drift the same way every period — and the remainder line absorbs the residue, so a $1,234.56 parent never becomes $1,234.55 or $1,234.57 of children. A fixed amount larger than what is left of the parent is capped at the remaining balance.'

Percentages across non-remainder lines may total at most 100%. The editor validates all of this at save: line count, one remainder, percent bounds, and that each Set field is enrichable for the data type.

## What the children look like

- Children **inherit every field from the parent** — date, description, account, everything — except the amount (recomputed per line) and whatever the line's Set fields override. Credit/debit columns, when present, are scaled proportionally so they stay consistent with the split amount.
- Children get **derived ids** based on the parent's id, so re-syncing the same data produces the same children instead of new rows.
- The parent record itself is **replaced** — it does not sync alongside its children.

> **Everything downstream sees the children, not the parent:** 'Splits run first, at the guard stage. Later enrichments — Memory, lookups, rules, alerts — operate on the child records; the parent is already gone. An alert on Amount greater than 5,000 will not fire for an $8,000 payroll split into smaller lines, because no single record with amount 8,000 exists anymore.'

A child produced by one split is **never split again**, even if it happens to match another Split enrichment — splitting is a single pass.

## Setting it up

1. **Create the enrichment** — On the Enrichments tab, click "Add an enrichment" and choose Split in the Guard data
   group.
2. **Describe when to split** — Build the condition that identifies the records, for example Description contains PAYROLL.
   Make it specific — every match becomes multiple rows.
3. **Define the lines** — Add 2 to 10 lines, give each a percent or a fixed amount, mark exactly one as the
   remainder, and set per-line field values such as Category.
4. **Attach, preview, enable** — Attach the feed in the Dependencies tab, check the feed's Live Preview (the parent shows
   struck through with its children beneath it), then flip the switch to Enabled.

![The Split configuration form: a When condition reading Description contains PAYROLL, and a Split into section with three lines — 22 percent setting category Taxes, 12 percent setting category Superannuation, and the remainder line setting category Wages with the note that it absorbs whatever is left including rounding — above a meter reading 34 percent plus remainder, always adds up to the full amount.](https://cdn.banksync.io/screenshots/enrichments/split-form.06000e9ad3768dc9.png "The payroll split: the When condition, three lines with per-line categories, and the allocation meter.")

## Related guides

- [Creating Enrichments](/docs/enrichments/creating-enrichments): the shared condition builder in full.
- [Filters](/docs/enrichments/filters): the other guard that changes which rows sync.
- [Alert enrichments](/docs/enrichments/alerts): alerts evaluate the children a split produces.