doomathdoomath.com
arrow_backAll Calculators/Finance & Business/Tax Allocation & Reverse Model
percent
doomath Calculator

Sales Tax & VAT / GST Reverse Splitter

Extract pre-tax base prices from gross receipt totals (inclusive) or calculate statutory tax additions (exclusive) instantly.

receipt_long

Transaction & Jurisdiction Parameters

Jurisdiction Rate Presets
$
Total inclusive of tax
%
VAT, GST, or Sales Tax %
analytics

Fiscal Allocation Summary

Net Product Subtotal $1,000.00 Merchant revenue retained
Tax Remittance Amount $200.00 Tax Rate: 20.0%
Net Subtotal:$1,000.00
Tax Output:+$200.00
Gross Invoice Total:$1,200.00

Revenue vs. Tax Share

Calculator guide

How to use the Sales Tax & VAT Splitter

Calculate tax-inclusive and tax-exclusive prices and split sales tax or VAT from a total.

01Set inputsChoose values, units and assumptions.
02Apply the modelTax added to net: Tax = Net × rate; Gross = Net + Tax. Tax extracted from gross: Net = Gross ÷ (1 + rate); Tax = Gross − Net.
03Read the resultCheck the output against the assumptions before using it.
menu_book

What this calculator does

Choose whether your entered amount already includes tax. The calculator either adds tax to a pre-tax amount or extracts the tax portion from a tax-inclusive total.

functions

Formula & method

Tax added to net: Tax = Net × rate; Gross = Net + Tax. Tax extracted from gross: Net = Gross ÷ (1 + rate); Tax = Gross − Net.

fact_check

Assumptions & notes

  • A single percentage rate does not model progressive income taxes.
  • Tax rates differ by jurisdiction, product, customer and transaction type.
  • Country presets are reference examples and should be verified before filing or invoicing.
account_tree