AI Prompts for Pricing Copy: Three Neighbours for Every Number

Most AI prompts for pricing copy hand the model a number and ask for words around it. The model gets the figure and none of the three things a buyer checks beside it, so it invents them.

AI Prompts for Pricing Copy Start With a Number You Already Decided

A prompt takes the price as an input, so it can arrange your number - it cannot mean it. The meaning lives in the three things beside it: per what, against what, with what attached.

The Prompt Inherits Your Decision

The copywriting prompts in the catalog share one shape. One takes {product} priced at {price}, another {offer} at {price}, the product page takes Price: {price}. None asks what the number includes, how long it lasts or what it is compared to. The prompt does not validate your pricing decision, it decorates it: without a unit or conditions, the model writes "affordable" around the gap.

Three Neighbours, Not One Adjective

The unit is what you pay for. The comparison is what the number is measured against. The condition is what is included, what costs extra and what happens if it fails. The model writes the number and the adjective; the neighbours arrive written or invented.

Neighbour One - The Unit

Per What, For How Long

"49" is not a price. "49 per month, cancel anytime" is. The unit answers per what, for how long, and what happens on renewal. Write it as a rule: the unit sits in the same sentence as the number, never in a footnote - which is exactly where the model puts it, and where the reader stops reading.

Annual Billing Is Arithmetic, Not a Badge

"Two months free" and "save 17%" are arithmetic claims the model writes without doing arithmetic. A plan at 99 per month is 1,188 a year; the same plan at 990 is ten payments, exactly two months free. The saving is 198, or 16.67% of 1,188. "17%" is true, "20%" is not, and 20% is what a model reaches for unchecked. Ask for the formula and the result, not the adjective.

Per Seat Is a Multiplication the Reader Does Anyway

Per seat, the buyer multiplies for their own team and that becomes "their" price. At 12 per seat, three seats is 36 and ten is 120. Ask for both and the multiplication arrives without the pessimism. Not a discount - the same unit written twice.

Neighbour Two - The Comparison

The Struck-Through Price Needs a History

A crossed-out former price is a claim about the past. In the United States, the FTC rule on former price comparisons (16 CFR 233.1) treats the comparison as legitimate only when the former price was the actual, bona fide price the item was offered to the public on a regular basis for a reasonably substantial period. In the EU, Article 6a of the Price Indication Directive, as amended by Directive (EU) 2019/2161, sets how a reduction is announced, including the prior price; the Commission's guidance applies from 28 May 2022. Both say the same thing: a comparison price is a fact with a date. The model writes "was 199, now 99" without knowing whether 199 existed, so this is a field you supply. No honest comparison? The field says none.

Compare With the Thing It Replaces

The honest comparison is often the cost of the alternative: an hour of a professional, the tool you replace, the error you stop making. The model drafts it only if you hand it the numbers; otherwise it produces a plausible range, and a plausible range about someone else's rates is a liability.

Never Let the Model Do the Percentage

From 199 to 99 the saving is 100, which is 50.25% - not "50%". From 1,188 to 990 it is 16.67% - not "20%". Ask for the subtraction and the percentage to two decimals, then check with a calculator. A false percentage is the one error a reader catches in five seconds.

Neighbour Three - The Condition

What Is Included, What Is Not

Every offer has an inclusion list and an exclusion list. The model writes the first because it sells and drops the second because it does not. Instruction: for every element, declare it included, metered or excluded, and never list it without a unit - "three active projects", not "three projects".

Mandatory Fees Belong Inside the Number

The UK Competition and Markets Authority published its price transparency guidance (CMA209) in November 2025: pricing information must include mandatory fees, taxes and charges, and it names drip pricing (charges appearing as the buyer advances) and partitioned pricing (components shown, total paid not). In a prompt: total first, breakdown second. A "+ fees" or an unexplained "starting at" means the block is not done. A writing rule, not a compliance certificate.

The Guarantee Is a Condition Too

A guarantee has a trigger (what counts as failure), a window (how long) and an action (refund, replacement, credit, and who pays return shipping). "100% satisfaction guaranteed" promises nothing claimable. Rewrite it as a sentence you could enforce, then keep that three-part shape.

Where AI Prompts for Pricing Copy Actually Help: Three Catalog Prompts

The Offer Page and Its Risk Block

The PAS sales page prompt (copywriting, $2.99) takes {offer}, {price} and {audience} and returns five headline angles, the problem, agitation by money, time, energy and opportunity, a three-step solution, three objections with replies and a closing recap. Its risk block is where the three-part guarantee belongs.

The Structure That Asks for the Price

The AIDA sales page prompt (copywriting, $2.00) takes {product} priced at {price} and returns ATTENTION, INTEREST, DESIRE and ACTION with the risk reversal inside ACTION, under 500 words. Run it twice with prices of 9 and 900 and compare the ACTION blocks. If both sound reasonable, one is lying.

The Product Page Where Conditions Become Questions

The e-commerce product page prompt (copywriting, $2.99) ends with a five-question FAQ on shipping, care, sizing, returns and the guarantee, plus feature-benefit-proof bullets and a rule against unsupported superlatives. That FAQ is the condition layer in the buyer's words.

The Five-Line Price Card and Three Tests

The Five Lines

Before prompting, fill five lines: the number with its unit in one sentence; the comparison price with date and source, or "none"; inclusions, exclusions and what is billed separately; the guarantee in three parts; the places the number will appear. Paste those five lines instead of the phrase "write the price".

Test One - Read the Number Aloud

Read only the number and its sentence. If you cannot say "per what, for how long", the reader will supply their own.

Test Two - Follow the Number to the Checkout

Buy once, or simulate to the last step, and compare the total with the published figure. A charge appearing late means the block was never finished.

Test Three - Do the Arithmetic by Hand

Recompute the percentage and the annual figure. If the page promises a round saving, the subtraction must produce exactly that number.

What the Model Cannot Know

It does not know whether the former price existed, for how long, or in which market the page runs. It does not know your costs, your margin, or the charges your checkout adds. It cannot tell whether the guarantee is one your operation can honour. Name a competitor and it invents a plausible figure, because it looks nothing up. So keep the human checks short: reread the unit, open the checkout, recompute two percentages, compare five appearances of the number.

FAQ

Is a "starting at" price ever honest?

Only if it says starting from what and what a typical buyer ends up paying.

Should the yearly price appear on the page?

If the plan exists, yes. It is the real unit for many buyers and it is where the saving arithmetic lives.

Can the model write the comparison against a competitor?

It can draft the sentence. The numbers are yours, with a date. Third-party prices move and the model does not check them.

How specific should a guarantee be?

Specific enough that someone can claim it without writing to you first: what counts, for how long, and what they receive.