Invoice Billing Address Validator
Check a billing address is complete and correctly formed for its country, before it is invoiced.
Invoice Split Payment Calculator
Split one invoice across several payers, evenly or by share, without losing a penny.
Quick Tool Overview
The Split Payment Calculator divides an invoice across several payers evenly, by percentage, by fixed amount or by a weighting, and allocates the rounding remainder to a named payer so the shares always reconcile to the invoice exactly.
- What it does
- Splits an invoice between payers
- You give it
- The total, the payers and how to divide it
- You get back
- A table that adds up to the invoice exactly
- Best for
- Shared costs, cost centres and group bookings
About the Invoice Split Payment Calculator
Splitting an invoice looks like division until the money does not add up. Three people sharing £100 each owe £33.33, which totals £99.99, and the missing penny has to go somewhere explicit or somebody quietly absorbs it — which is fine once and not fine across a year of shared invoices.
This splits an invoice evenly, by percentage, by a fixed amount each, or by a weighting such as headcount, floor area or usage, and allocates the rounding remainder to a named payer rather than leaving it. The totals always reconcile exactly to the invoice.
It handles the cases that come up in practice: a shared invoice between departments or cost centres, a group booking split between individuals, a joint venture split by stake, and a recharge to tenants by floor area. Each produces a table you can copy, with the share, the tax on that share, and what each payer owes.
Key features of the Invoice Split Payment Calculator
No lost penny
The remainder is allocated to a named payer, not absorbed.
Four ways to split
Evenly, by percentage, by fixed amount, or by a weighting.
Weighting by anything
Headcount, floor area, usage or revenue.
Tax per share
Each payer’s share of the tax as well as the net.
Copyable table
Payer, share, tax and total, ready to send.
How to use the Invoice Split Payment Calculator
-
1
Enter the invoice total
Including tax, or excluding it with the rate set.
-
2
Choose how to split
Evenly, by percentage, by fixed amounts, or by a weighting.
-
3
Name the payers
One per line, with their share if it is not an even split.
-
4
Decide who takes the remainder
The rounding penny goes somewhere named, not nowhere.
-
5
Copy the table
Each payer, their share, their tax and what they owe.
Frequently asked questions
Round each share down, then allocate the remaining pennies one at a time to the largest shares, or give the whole remainder to a named payer. Either way the shares must total the invoice exactly.
Commercially yes, and it happens constantly. For tax purposes the invoice is still addressed to one customer — if each payer needs to reclaim tax on their share, each needs their own invoice, not a share of one.
By whatever drives the cost: headcount for a per-person service, floor area for rent and utilities, usage for metered services, revenue for a general overhead. State the basis, because that is what makes the split defensible.
That is a different thing: one payer paying part of what they owe. Use the instalment calculator, which schedules the remainder rather than dividing it between people.
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