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Stamp Duty

Stamp duty is a tax charged on certain legal documents and transactions, most commonly the purchase of property and, in some countries, the transfer of shares. It is paid by the buyer, usually as a percentage of the price, and the transfer normally cannot be registered until the duty is settled.

Because it is a one off cash cost at completion, it has to be budgeted separately from the purchase price itself.

From the Money Master HQ dictionary, founded by Shihan Sheriff (FCMA, VP of Finance at Nomod, CFO at Esanjo Ventures). How these definitions are written.

What it means

The name is historical: documents were once physically stamped to show the tax had been paid. The stamp has gone in most places and the filing is electronic, but the principle survives in the United Kingdom, Ireland, Australia, India, Singapore, Hong Kong and many other jurisdictions, and similar transfer or conveyance taxes exist elsewhere under different names.

Property is where most businesses meet it. Rates are typically banded, meaning different percentages apply to successive slices of the price rather than one rate applying to the whole amount, so the effective rate rises with value but never jumps in a single step.

Commercial premises, residential property, second properties and purchases by companies are often taxed at different rates, and surcharges for additional or non resident buyers are common. Stamp duty is not an expense in the profit and loss account when a business buys a building.

It is a direct cost of acquiring the asset, so it is capitalised into the carrying value of the property and recovered through depreciation over the asset's life, or through a lower gain when the property is eventually sold. Duty on a lease is treated as part of the cost of the right of use asset under current lease accounting.

For share transactions the rate is usually much lower but still worth planning around, often a fraction of 1% of the consideration. Many jurisdictions exempt transfers between companies in the same group, transfers on a genuine reorganisation, or newly issued shares as opposed to transfers of existing ones, so the way a deal is structured can change the duty considerably.

The most common commercial problem with stamp duty is timing rather than amount. It falls due at completion, in cash, at the very moment a buyer is also paying deposits, legal fees and moving costs, and it cannot usually be borrowed against the property because lenders advance against value rather than transaction taxes.

Deals fall over on this point more often than on the headline price.

In practice

Real-world examples.

1

Example

A veterinary practice buys its premises for $340,000 and discovers at completion that stamp duty of $5,000 is payable in cash on the day. The partners had assumed it could be added to the mortgage and have to draw on the practice overdraft to complete.

2

Example

An investor buying a second residential property faces both the standard banded rates and an additional 3% surcharge on the whole price, turning a $12,000 bill into $12,000 + $400,000 x 3% = $24,000 on a $400,000 purchase. The surcharge changes the yield calculation enough to make the deal marginal.

3

Example

A private company buys back shares from a departing founder for $250,000 and pays transfer duty of 0.5%, or $1,250. The finance director confirms in advance that the buyback qualifies for the standard rate rather than a higher rate applying to certain corporate purchasers.

Formula

Calculation

Stamp duty = sum across bands of (amount of price falling in the band x that band's rate) Take a commercial property bought for $600,000 under a banded scale with 0% on the first $150,000, 2% on the slice from $150,000 to $300,000, and 5% on anything above $300,000. The first band contributes $150,000 x 0% = $0. The second band covers $300,000 - $150,000 = $150,000 at 2%, giving $150,000 x 2% = $3,000. The third band covers $600,000 - $300,000 = $300,000 at 5%, giving $300,000 x 5% = $15,000. Total stamp duty is $0 + $3,000 + $15,000 = $18,000, which is $18,000 / $600,000 = 3% of the price as an effective rate, even though the top band rate is 5%. On a share transfer the arithmetic is simpler: a flat 0.5% duty on $80,000 of shares is $80,000 x 0.5% = $400.

Case study

Seen in the real world.

This illustrative and fictional example concerns Pelham Grove Dental, an invented three surgery practice buying its own premises for $450,000 after years of renting. The practice manager budgeted $9,000 for stamp duty by applying a flat 2% to the purchase price, a rate she had seen quoted on a comparison website.

The actual charge used the banded scale: nothing on the first $150,000, then $150,000 x 2% = $3,000 on the slice to $300,000, then $150,000 x 5% = $7,500 on the amount above $300,000, giving $0 + $3,000 + $7,500 = $10,500. The effective rate was $10,500 / $450,000 = 2.33%, and the shortfall against the budget was $10,500 - $9,000 = $1,500.

The number was small but the timing was not. In this fictional case the $1,500 arrived alongside legal fees, a survey charge and the first month's loan repayment, and the practice completed only because a partner lent the money personally for a fortnight. The lesson the practice took away was to model transaction taxes band by band rather than applying an average rate, and to hold a completion day cash buffer of at least 1% of the purchase price.

Watch out

Common mistakes.

  • Applying the top rate to the entire purchase price, which overstates the duty, or applying the lowest rate to everything, which understates it badly.
  • Treating stamp duty as a deductible expense in the year of purchase when it is a capital cost that forms part of the asset's carrying value.
  • Forgetting that duty is payable in cash at completion and cannot normally be added to the mortgage, which leaves buyers short on the day.

Questions

People also ask.

Who pays stamp duty, the buyer or the seller?

Almost always the buyer, and the transfer usually cannot be registered until the duty has been paid and the return filed.

Is stamp duty charged on the price or the market value?

Normally on the consideration actually paid, but tax authorities can substitute market value where a transaction is between connected parties or the price looks artificial.

Are any purchases exempt?

Reliefs vary by country but commonly cover first time buyers below a threshold, transfers between group companies, transfers on divorce or inheritance, and certain charity purchases.

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Last updated · October 8, 2026
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