---
title: "Ad Valorem Tax Definition | Model Diplomat"
description: "An ad valorem tax is a duty based on the assessed value of goods or property. It's crucial for understanding fiscal policies in India and trade law."
url: "https://modeldiplomat.com/learn/glossary/ad-valorem"
---

[New](https://modeldiplomat.com/)

#

Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- An ad valorem tax or duty is levied as a fixed percentage of the assessed monetary value of a good, service, or property rather than on its quantity.
- How does an ad valorem duty differ from a specific duty?
- Why are ad valorem taxes considered revenue-buoyant?
- Which legal instrument governs valuation for ad valorem customs duties under the WTO?
- What is the main administrative drawback of ad valorem levies?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

An ad valorem tax or duty is levied as a fixed percentage of the assessed monetary value of a good, service, or property rather than on its quantity.

Go beyond the definition

## Research ad valorem like a delegate

Model Diplomat's AI drafts position papers, speeches, and country research with real sources — built for MUN and politics students.

## Research it like a delegate

Research on modeldiplomat.com

## Ask a follow-up about ad valorem

Open a cited briefing in Model Diplomat search — timelines, positions, and sources you can use in committee or exam answers.

[Start research on ad valorem](https://modeldiplomat.com/search?q=Explain%20ad%20valorem%20%E2%80%94%20key%20dates%2C%20actors%2C%20positions%2C%20and%20sources)

Example

Under India's GST, introduced on 1 July 2017, a passenger car attracts 28% ad valorem tax plus compensation cess, so the levy rises automatically as the vehicle's invoice value increases.

Keep learning

## Go deeper than the definition

Lessons

[Trade Agreements Tariffs Protectionism](https://modeldiplomat.com/learn/lessons/exam-global-economy-trade-agreements-tariffs-protectionism)

Courses

[Exam Global Economy](https://modeldiplomat.com/learn/courses/exam-global-economy)

[Explore all Civil Service & Diplomatic Exams lessons](https://modeldiplomat.com/learn/civil-services)[Test yourself with a quiz](https://modeldiplomat.com/learn/glossary/quiz/civil-services)

## Take ad valorem beyond the glossary

Ask the AI research engine built for diplomacy — get briefings, position papers, and speeches with sources you can cite in committee.