Sales vs Volume: Escaping the J-Curve
Pick businesses where the sale comes first, not ones that bleed cash before profit
- Difficulty
- Moderate
- Time to result
- ~weeks to results
- Steps
- 3
- Confidence
- 92%
Priestley splits businesses into two shapes. Sales businesses make a single sale of over £1,000, sign an agreement, take the money, then fulfil, so cash arrives first and you know what you'll earn; think financial planners, accountants, bookkeepers and coaches selling packages. Volume businesses require heavy up-front investment to then sell little bits at a time, producing a J-shaped cash-flow curve, losing money before profit; think apps at £6 a month, restaurants, cupcakes and software. The J is worse still without recurring revenue. The rule of thumb: five sales of two grand equals £10K a month, and four sign-ups a week at £5K equals a million a year. For a beginner, the sales model de-risks everything because the sale precedes the spend.
Origin
Extracted from Deep Dive with Ali Abdaal; Priestley used it to shoot down Ali's burger-van, productivity-app and cupcake ideas as classic J-curves.
Core principles
- 01Sales businesses collect cash before delivering; volume businesses spend first.
- 02A single ticket over £1,000 changes the whole economics.
- 03Physical, perishable and app businesses are usually J-curves.
- 04Beginners should avoid businesses that lose money before they make it.
How to run it
- 1
Classify the model
Determine if the idea is a sales business (sale before fulfilment) or a volume business (invest, then sell small amounts repeatedly).
Pro tip The J stands for the shape of the cash flow: down, then up.
Watch out Physical products, food, apps and restaurants almost always sit in the J-curve.
- 2
Set a meaty ticket
Aim for a price above £1,000, typically B2B, so the effort to win and serve a client is repaid.
Pro tip A £5K package at four sign-ups a week is roughly a million a year.
Watch out Sub-£1,000 tickets force hundreds of sales a month just to survive.
- 3
Stress-test the maths
Do a back-of-a-napkin model: is five sales of £2K a month sensible with one or two people?
Pro tip If the maths can't credibly reach £10K a month, drop the idea.
Watch out Recurring revenue matters; one-off sales make the J-curve deeper.
In the wild
Priestley phones a prospect offering a full podcast and video studio setup plus management for seven thousand dollars. The client signs, and only then does Priestley buy the microphones and equipment, fulfilling after the cash is committed.
→ Cash arrives before spend, a textbook non-J-curve sales business.
A hobby guitar-lesson idea fails the test until repackaged as in-home family lessons at £200 a month on a twelve-month commitment, turning a low-ticket hobby into a two-grand package that could hit five sales a month.
→ Only meets the criteria once restructured into a £2K committed offer.
Common mistakes
Defaulting to low-ticket products
Imagining a business as a cupcake store or £6 app locks you into volume selling and thin margins.
Ignoring setup costs
Restaurants, software and physical goods carry big up-front costs that create a long, cash-negative J.
Is it for you?
Best for
First-time founders choosing between business models with limited capital.
Not ideal for
Funded teams deliberately building scalable software or media assets for the long game.
From the transcript
“there are certain businesses that are sales businesses that are not J curves and then there are businesses that are volume businesses that are typically…”
“if you have a five thousand dollar package and you can make four sign ups per week that's a million dollars a year”
From the episode
Entrepreneurship Masterclass: How to Make $10k - $1M per Month - Daniel Priestley
Daniel Priestley