Nine tax calculators for a regulated UK practice

The problem with a brochure in a regulated market

Someone selling a second property, disposing of shares, or working out what a crypto position costs them is not looking for a firm. They are looking for a number. Every accountancy site in the UK answers that with a contact form and a promise of a free consultation, which asks the visitor to hand over their details before they learn anything.

That is a weak position in search and a weaker one in AI answers. A page that describes a service has nothing a generative engine can quote. A calculator that produces a figure under a named set of rules does.

What we built

Nine calculators, each scoped to a genuinely different set of rules rather than one engine with the labels changed. General capital gains tax, property disposals, shares, crypto, non-resident disposals, Business Asset Disposal Relief, stamp duty, inheritance tax and income tax.

The distinction matters. Non-resident CGT and BADR are not the main calculator with different wording. They carry different rate bands, different reliefs, different qualifying conditions and different reporting deadlines. Building them as one configurable tool would have produced nine pages that Google correctly reads as one, which is exactly the thin content pattern that gets a set of pages filed and forgotten.

Each calculator sits on its own URL with its own explanation of the rules it applies, so the page answers the question in text as well as in the tool. That gives a search engine something to index, an AI engine something to cite, and a visitor a reason to trust the output.

Arithmetic with consequences

This is the part that separates a tax calculator from a mortgage widget. A wrong figure in a regulated domain is not a cosmetic bug. It is advice, and someone may act on it.

So the rules are held as explicit, reviewable values rather than being scattered through the interface, the bands are stated on the page next to the result, and every calculator says plainly what it does not cover. The tool produces an informed estimate and tells the reader where the estimate stops. That framing is what makes it publishable in a market where the practice carries professional obligations.

The 60 day HMRC reporting deadline for UK residential property disposals shapes the whole service architecture. It is the reason the site treats property CGT as its own path rather than a subheading, because the visitor who needs it is usually already against a clock.

The lead engine

A calculator earns the enquiry it receives. By the time someone has entered a disposal value, an acquisition cost and a set of dates, they have told themselves the problem is real and they have seen a figure they would like a qualified person to confirm. The enquiry that follows is warmer than anything a contact form collects cold.

The service pages sit behind the calculators rather than in front of them. Property, business assets, shares and investments, non-resident, inheritance tax planning and HMRC returns each have a page, and each is reachable from the calculator that produces the number it relates to.