KDP Pricing Strategy: Royalty Optimization Formula

Okay so I just ran the numbers on like 30 of my books last week and the pricing thing is actually way simpler than people make it sound but there’s this one formula that changed everything for me.

The basic deal is Amazon gives you two royalty options – 35% or 70%. Most people just pick 70% because duh, more money right? But here’s where it gets interesting and kinda weird.

The actual math that matters

So 70% royalty sounds amazing until you realize Amazon charges delivery fees on that tier. It’s $0.15 per megabyte for ebooks. For a typical novel that’s like 50 cents maybe, not terrible. But for low-content books with lots of images or coloring books? That delivery fee can absolutely destroy your profit.

I had this coloring book – wait I should back up. The formula I use now is stupid simple:

Net royalty = (List price × Royalty %) – Delivery fee – Amazon’s cut

But what you really wanna calculate is your actual dollar amount per sale at different price points. So like:

• At $2.99 with 70% royalty: ($2.99 × 0.70) – $0.15 delivery = roughly $1.94
• At $9.99 with 70% royalty: ($9.99 × 0.70) – $0.15 delivery = roughly $6.84
• At $9.99 with 35% royalty: ($9.99 × 0.35) = $3.50

The 70% tier only works between $2.99 and $9.99 by the way. Outside that range you’re stuck with 35%.

Where most people screw this up

Everyone obsesses over the percentage but volume matters way more. I’ve got a planner that makes me more money at $5.99 selling 50 copies a month than my $9.99 planner selling 15 copies. The math is just ($5.99 × 0.70 – $0.15) × 50 versus ($9.99 × 0.70 – $0.15) × 15.

That’s like $292 versus $100. Pretty massive difference.

Oh and another thing – the delivery fee changes based on your file size so you gotta actually check your KDP dashboard for the exact amount. I was using $0.15 as an estimate for months before I realized one of my books was only $0.08 because the file was smaller.

The sweet spot testing method

This is gonna sound weird but I literally keep a spreadsheet now where I test price points every 30 days. My cat knocked over my coffee on the original version so I had to rebuild it but whatever.

Here’s what I track:

• List price
• Actual royalty per sale (after delivery fees)
• Units sold that month
• Total revenue
• Page reads if it’s in KU

The page reads thing is huge and people forget about it. Kindle Unlimited pays around $0.004 per page read right now (it fluctuates). So if your book is 200 pages and someone reads the whole thing, that’s like 80 cents. Doesn’t sound like much but if you’re getting 10,000 page reads a month that’s $40 just sitting there.

My actual pricing strategy for different book types

Low-content books like journals and planners – I usually go $5.99 to $7.99. The printing costs are lower so Amazon’s not taking as much, and people seem to think that’s a reasonable price for a physical notebook. I tried $12.99 once and sales just died.

Coloring books are tricky because the file sizes are huge. Sometimes you’re paying $2+ in delivery fees on the 70% tier which makes zero sense. I actually use 35% royalty on some of my bigger coloring books and price them at $11.99 or $12.99. The math works out better even though the percentage is lower.

For ebooks – fiction specifically – there’s this psychological thing around $2.99 to $4.99. That range converts really well. I’ve got a romance novel at $3.99 that consistently sells because it feels like an impulse buy. Same book at $7.99 sold maybe a third as many copies.

Wait I forgot to mention – you can change your price basically whenever you want. It takes like 24-72 hours to update but there’s no penalty. So if you launch at $9.99 and it’s not moving, drop it to $4.99 and see what happens.

The KU decision

Okay so Kindle Unlimited complicates everything. When you enroll in KU you can only use the 70% royalty tier and your book has to be exclusive to Amazon. But you get paid for page reads.

I run about 60% of my books in KU and 40% wide (available on other platforms). The KU books are priced lower usually – like $2.99 to $4.99 – because I’m really trying to maximize page reads more than individual sales.

The formula for KU books is different:
Monthly income = (Units sold × Net royalty) + (Page reads × KENP rate)

Some months the page reads make up like 70% of my income from a single book. It’s wild.

Competitive pricing research

This is gonna sound obvious but you gotta check what similar books are priced at. I go on Amazon, search for books like mine, and literally write down the prices of the top 20 results.

If everyone’s clustering around $6.99, there’s probably a reason. Maybe that’s what customers expect to pay. If you come in at $12.99 you better have something that justifies it – like way more pages or better quality or whatever.

I had this whole thing last month where I priced a productivity planner at $8.99 thinking it was reasonable and then realized all the bestsellers were at $5.99 to $6.99. Dropped my price and sales picked up within a week.

The launch pricing trick

When I launch a new book I usually start at $0.99 or $2.99 for the first week or two. Yeah the royalty sucks at $0.99 (35% only) but you can get some initial sales and maybe some reviews. Then I gradually increase it.

Like $0.99 for week one, $2.99 for week two, then settle at $4.99 or whatever makes sense. Some people disagree with this strategy but it’s worked for me more times than not.

Oh and if you’re doing paperbacks the pricing is completely different because you have to factor in printing costs. Amazon shows you the minimum price you can list at based on page count and whether it’s black and white or color. You literally cannot go below that minimum.

For a 120-page black and white paperback the printing cost is usually around $2.50 to $3. So if you price it at $6.99, Amazon takes their cut, printing costs come out, and you’re left with maybe $1.50 to $2 depending on the royalty tier.

Testing and iteration

The biggest mistake I see people make is setting a price once and never touching it again. You gotta test this stuff. I change prices probably every 45 days on average just to see what happens.

Sometimes raising the price actually increases sales because people perceive it as higher quality. Sometimes dropping it floods you with buyers. You won’t know until you try.

I keep notes in my phone whenever I change something – like “changed planner from $7.99 to $5.99 on March 3rd” so I can track what happened. Super basic but it helps me remember what I tested and when.

International pricing

Amazon lets you set different prices for different Amazon stores – like amazon.co.uk, amazon.de, etc. Most people just let Amazon convert automatically but you can manually adjust.

I don’t mess with this much honestly because it’s a lot of work for not that much extra income unless you’re selling huge volume. But if you’ve got a book that’s doing well in the US, might be worth checking the UK price and adjusting it slightly.

The actual optimization formula I use

Okay so here’s what I actually do when I’m trying to optimize a book’s pricing:

1. Calculate net royalty at $2.99, $4.99, $6.99, and $9.99
2. Check competitor prices in my niche
3. Start at the middle price point (usually $4.99 or $6.99)
4. Track sales for 30 days
5. Adjust up or down by $1-2 and track another 30 days
6. Compare total revenue (not just per-sale royalty)
7. Stick with whatever made more money

It’s not complicated. You’re basically just testing to find the price point where (price × volume) is highest.

Sometimes you’ll find that $4.99 selling 40 copies makes you more than $7.99 selling 20 copies. Sometimes it’s the opposite. The market tells you what works.

Seasonal adjustments

Oh wait I should mention – some books sell better at different times of year and you can adjust pricing for that. Planners sell like crazy in November and December so I actually raise prices during Q4. Come January I drop them again because demand falls off.

Same with certain themed books. I’ve got a gratitude journal that I price higher around Thanksgiving. Sounds kinda mercenary but that’s just basic supply and demand.

When to use 35% royalty

Most people avoid 35% royalty but there are situations where it makes sense:

If you wanna price below $2.99 or above $9.99, you don’t have a choice. But also if your delivery fees are really high (like over $1), the 35% tier might actually net you more money at a higher list price.

I’ve got a big coloring book – like 100 pages with complex designs – and the file size is massive. At $9.99 with 70% I’d pay like $2.20 in delivery fees. That leaves me with about $4.80. But at $12.99 with 35% I get about $4.55 with no delivery fees. Pretty close, and some people are willing to pay the higher price for a bigger book.

You gotta actually run the numbers though. Don’t just assume.

The multiplication effect

Here’s something I didn’t realize until year three or four – small price optimizations multiply across your whole catalog. If you’ve got 50 books and you increase average profit per sale by just $0.50 through better pricing, and you sell 100 books a month total, that’s an extra $50 a month or $600 a year.

Doesn’t sound life-changing but it adds up. And if you’re selling more volume it adds up way faster.

I literally spent a weekend going through all my books and adjusting prices based on this formula and my monthly income went up like 15% without any new launches. Just from optimization.

Tools that actually help

I use a simple spreadsheet – Google Sheets works fine. Columns for title, current price, royalty rate, estimated delivery fee, net per sale, monthly units, and total revenue. Takes like 10 minutes to update once a month.

Some people use fancy tools but honestly the KDP dashboard shows you most of what you need. Sales reports, royalties, everything. I just export to CSV and dump it in my spreadsheet.

Oh and set up price change alerts if you’re competing directly with specific books. Sometimes competitors will drop their price and you might wanna match it or at least be aware. There are browser extensions that do this.

The whole pricing thing feels overwhelming at first but once you’ve done it a few times it becomes pretty automatic. You develop an intuition for what price point will work based on page count, niche, competition, all that stuff.

Just start with the formula, test for 30-60 days, adjust, and keep iterating. That’s really all there is to it.