The 7-Letter Formula Behind a £3 Million Sales Letter
Jun 11, 2026What if a single page of writing could out-earn an entire marketing department? In 1998 one eight-page letter did exactly that for me, and the formula behind it still works on every platform today.
In This Article
The quote that changed how I write
The letter that earned more than three million pounds
Why this still works on every platform
The quote that changed how I write
The legendary copywriter Gary Halbert once said that you are only one letter away from striking it rich.
He meant a sales letter. One single, well-crafted piece of writing.
I have believed that quote for more than twenty-five years. And I have the figures to prove it.
In a digital world, you and I might add one email, one webpage, one webinar or one LinkedIn article to Gary's list. The medium has changed completely. The principle has not changed at all.
You are only one well-crafted communication away from striking rich.
Let me show you exactly how I proved that. Then I will give you the formula, one letter at a time, so you can do the same in your own business.
The letter that earned more than three million pounds
Back in 1998 I sat down to write an eight-page letter.
I used a formula I had picked up, of all places, from a free booklet handed out by the British Post Office. It was never a closely guarded secret. It was sitting in plain sight, free for the taking.
The letter promoted my new audio newsletter, The Achievers Edge. I believe it was the world's first audio newsletter.
Over the next thirteen years, that one letter brought in an average of 1,500 subscribers every single month. Each one paid £9.97 plus £2.97 VAT. That is just under £13 a month.
Let me do the arithmetic with you.
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13 years x 1,500 subscribers x £13 per month = £3,042,000 That is an average of just under £20,000 every month, from a single piece of writing. |
More than three million pounds of recurring income, from one letter.
Now you can see why I am such a firm believer in Gary Halbert's quote.
Here is the part that matters most for you. I did not write that letter once and move on. I wrote it once, and it kept working for thirteen years while I got on with the rest of my business. That is the quiet power of getting one piece of writing right.
So what is the formula? It is called W.I.S.C.D.A.R. Seven letters, seven steps. Let me break each one down for you.
W is for Wavelength
Before anyone acts on your message, they have to feel that it is meant for them.
Your first job is to get on the same wavelength as your reader. You want to create a mental environment where they are primed to understand, believe and act on what follows.
One simple way is a pre-head that names the person you are speaking to.
Attention fellow pet iguana lover.
If you happen to own a pet iguana, you would find it almost impossible not to read on, wouldn't you?
Your headline can do the same work. Why some consultants are earning £250,000 a year while others struggle to get by.
The right reader leans in, because the words have quietly told them this is about them.
I is for Interest
Once you have their attention, you have to earn the next thirty seconds.
This is where you pique genuine interest. You point to the features of your product or service that make it different, unusual and worth their time.
Interest is not the same as desire. Do not confuse the two.
At this stage you are simply giving the reader a reason to keep going. A sense that something useful is coming if they stay with you a little longer.
Think of it as the difference between a closed door and one that is slightly ajar. You are not asking for a decision yet. You are just keeping them moving forward, line by line.
S is for Sell the Benefits
Here is where most people go wrong.
They list features and assume the reader will work out the value for themselves. They will not.
Your task is to translate every feature into a benefit. Do not tell them what it is. Tell them what it does for them.
Paint a vivid picture of the transformation. How will their life, or their business, be different and better after they use what you offer?
Do not say what it is. Say what it does for them.
This is the same principle that runs through my book on getting properly rewarded for your work, PAID! People do not pay for what you do. They pay for what it does for them.
C is for Conviction
People are reassured by social proof.
When others have already taken the step and been glad of it, the risk feels smaller to the person who is reading.
This is the place for testimonials, case studies and endorsements. I am a firm believer in this.
When I ran more seminars than webinars, my promotional pages would carry anywhere between 25 and 100 real testimonials from past attendees.
Do not underestimate how persuasive a specific, believable success story can be. One real result, told plainly, will do more work than a page of your own claims.
D is for Desire
Conviction tells the reader your offer works. Desire makes them want it now.
You raise desire by increasing the perceived, and the real, value of what you are offering.
That might mean a well-chosen bonus. A payment plan. A deadline. A special term that tips the balance from interested to committed.
The aim is simple. You increase the likelihood of the reader wanting what you offer, today rather than one day.
A is for Action
You must tell the reader exactly what to do next.
Vague endings lose sales. Be specific. Be clear.
This is also where I introduce a word I coined. Prestivoxitation.
You may know prestidigitation, meaning sleight of hand. This is sleight of voice, used with complete integrity.
Notice how the best order forms read. Yes, please send me my copy.
When you write the action in the first person, the reader processes the words as though they wrote them. They become the author of those words. It is not trickery. It is using language elegantly and honestly.
Two small shifts make the same point.
Replace the word cost with the word investment. One implies loss. The other implies a return. Both are true. They simply frame the same fact differently.
And say when we work together rather than if we work together. You gently presuppose the outcome, without ever being pushy.
R is for Results
Finally, you remind the reader of everything they are going to get.
Focus on the experience, the transformation and the benefits.
A natural way to do this is to lead each benefit with the phrase now you can, or now you can enjoy.
It flows far better than the older which means that approach. And it keeps the reader picturing themselves already on the other side of the decision.
Did you notice how often I have used that little phrase in this very article?
Why this still works on every platform
The beauty of W.I.S.C.D.A.R. is its versatility.
The same seven steps apply to an email, a webpage, a proposal, a webinar script, a piece of direct mail or a post on LinkedIn.
The medium keeps changing. The way you and I decide to say yes does not.
Master the sequence once and you can use it for the rest of your working life.
And the order matters. Each letter does its own job, and each one prepares the ground for the next. Skip wavelength and your benefits land on a reader who never felt spoken to. Rush to action before you have built conviction and desire, and you ask for the sale too soon. Follow the seven steps in order and you simply walk alongside the reader, one natural step at a time.
The medium keeps changing. The way human beings decide to say yes does not.
Your next step
Everything I have shared with you here is drawn from The Persuasion Book.
In it I set out the full method, with worked examples, in my own words. The chapter on W.I.S.C.D.A.R. goes far deeper than I can in a single article.
The book is on Amazon. But right now you can get a copy completely free.
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Get your free copy of The Persuasion Book |
And if you would like the step-by-step system that sits behind the formula, I have put together The Persuasion Formula course. It is the same approach I used to build and sell my own company.
You are only one letter, one email or one webpage away from your next big success.
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