Budget is not total dollars — it is dollars assigned to the lever that pays
A launch budget that is not assigned to a lever is not a launch budget. At $1,500 for a three-book series chasing sales the split that keeps rank and read-through in balance is Amazon Ads $600 at 40%, promo sites $450 at 30%, newsletter swaps $225 at 15%, and contingency $225. At the same $1,500 for the same three books chasing email the split is Amazon $225 at 15%, promo sites $600 at 40%, swaps $450 at 30%, contingency $225. At 60 sales × 22% Spanish monthly the price sets royalty, but budget sets where the readers who buy at that price come from. The same $1,500 for a stand-alone chasing sales is Amazon $375 at 25%, promo $525 at 35%, swaps $300 at 20%, contingency $300 — stand-alone must monetize the promo book itself at $0.35 99¢ or $1.39 Countdown, not via read-through, so Amazon drops to 25% and promo rises to 35% where 99¢ $0.35 must pay itself without read-through.
The checker asks total launch budget you will spend, how many books are in the series where 1 is stand-alone and 2 plus is read-through can carry free and 99¢, and primary goal where sales is read-through, email is list growth, and rank is visibility. The model is intentionally small: total times a percentage per lever that moves with goal and series. At $1,500 chasing sales with a series Amazon 40% is $600, promo 30% $450, swaps 15% $225, contingency the remainder. At $400 for a stand-alone chasing sales Amazon 25% $100, promo 35% $140, swaps 20% $80, contingency $80 is thin where $100 Amazon is about 8,300 impressions at $12 CPM → 37 clicks → ~2 sales at 6% where stand-alone read-through is not the lever. The browsable win is not more total dollars; it is the $600 on Amazon where series read-through pays at 50% and the 60% read-through where the Series Page lets it be found.
Finished hours, price times platform share, sample windows, and SAY sheets all live elsewhere. A nine-hour thriller at $275 PFH is $2,475 production before the first sale, at $19.99 exclusive $8.00 per sale at 40 sales is $320 per month, the sample 5:00 at 63:00–68:00 is where the hook is heard, and the SAY KAEL-en is how it is said when the hook is spoken. A launch budget is none of those; it is where the dollars you already set aside are assigned to the lever that pays — Amazon for velocity, promo for rank spike, swaps for list.
How the split is built — goal moves the percentages, series moves the base
Total budget is the dollars you will spend on the launch — the total the split divides. The tool clamps zero to 20,000 so the math never places a pamphlet or a trilogy in the full-length band.
Series books is how many books are in the series where 1 is stand-alone and 2 plus is read-through can carry free and 99¢. A three-book series can monetize free via read-through: a free book zero pays via books two and three at 70% where series value per free reader at 50% read-through is $5.24. A stand-alone must monetize the promo book itself at $0.35 99¢ or $1.39 Countdown, not via read-through, so Amazon drops to 25% and promo rises to 35% where 99¢ $0.35 must pay itself without read-through.
Primary goal moves the percentages. Sales goal for a series leans Amazon: Amazon 40%, promo 30%, swaps 15%, contingency remainder where series read-through pays. Sales goal for a stand-alone leans promo: Amazon 25%, promo 35%, swaps 20%, contingency remainder where the promo book must pay itself. Email goal shifts to swaps and promo: Amazon 15%, promo 40%, swaps 30%, contingency remainder where a reader who claims a free chapter becomes a follow. Rank goal leans Amazon for velocity: Amazon 45%, promo 35%, swaps 10%, contingency remainder where rank at $1.99 Countdown 70% $1.39 holds rank while series read-through pays.
At $1,500 chasing sales with a series Amazon $600 at $12 CPM is about 50,000 impressions → 225 clicks at 0.45% CTR → ~19 sales at 8.5% conversion where series read-through amplifies, while single $418 from Kindle plus 45,000 KENP at $0.0040 is $180, total $599 exclusive. The same $1,500 chasing email with a series Amazon $225 is 18,750 impressions → 84 clicks → ~7 sales where email swaps 30% is $450 where a reader who claims a free chapter becomes a follow at $1.00–$2.50 per new email. The same $400 for a stand-alone chasing sales Amazon $100 is 8,333 impressions → 37 clicks → ~2 sales at 6% where stand-alone read-through is not the lever.
The calculator is deterministic. The same total, series size, and goal always give the same split, because the percentages and the CPM, CTR, and conversion are fixed. Everything is calculated in your browser. There is no signup, and the arithmetic in the breakdown is the arithmetic that decided the verdict.
Reading the verdict — healthy split, thin budget, series but Amazon thin, email but swaps thin
Healthy split at $1,500 with a series chasing sales: Amazon $600 40% with promo $450 and swaps $225 is healthy where Amazon feeds read-through that pays the promo sites. Headline reads "$1,500 budget — Amazon $600 + promo $450 + swaps $225." Body names the split that keeps rank and read-through in balance.
Thin budget below $500. Headline reads "$400 is thin — $100 Amazon + $140 promo leaves little for swaps." Body names the impressions about 8,300 at $12 CPM → 37 clicks → ~2 sales at 6% where thin budgets need a stand-alone price where a sale must pay itself. Thin at $400 for a series chasing sales is warning, not fail, because $400 still funds a promo-heavy plan where 99¢ $0.35 must pay itself without read-through.
Series but Amazon thin at hasSeries true but Amazon under $400 where total $800 at sales goal gives Amazon $320 40% but the tool marks warning when Amazon drops below $400 where series read-through needs Amazon to feed it. At $800 for a series chasing sales Amazon $320 at 40% is under $400, warning where Amazon at 40% (~$320) feeds read-through that pays the promo sites but is still thin.
Email but swaps thin at goal email with swaps under $200 where email goal needs swaps at 30% (~$450 at $1,500). At $1,500 email Amazon $225 swaps $450 is not thin, at $600 email swaps $180 is thin where email goal shifts to swaps at 30% is the lever for list growth.
Each result returns metrics for Amazon, promo, swaps, and contingency, a breakdown of the five rows, tailored recommendations, the table of when each goal wins at $1,500 3-book series (Sales $600/$450/$225, Email $225/$600/$450, Rank $675/$525/$150), and related links that remain inside the launch flow.
Why sales goal leans Amazon for series and promo for stand-alone
Sales goal for a series leans Amazon 40% because series read-through pays: a free book zero pays via books two and three at 70% where series value per free reader at 50% is $5.24, and Amazon at $12 CPM is the velocity that feeds that read-through. Sales goal for a stand-alone leans promo 35% because the promo book must pay itself at $0.35 99¢ or $1.39 Countdown, not via read-through, so promo sites that email discount and free lists are the rank buy where stand-alone has no series to pay it. The same $1,500 chasing sales with a series 40% Amazon $600 vs stand-alone 25% $375 is a $225 gap toward promo where stand-alone must pay itself.
Email goal leans swaps 30% plus promo 40% is 70% of budget where a reader who claims a free chapter becomes a follow. Amazon at 15% is support for email, not the engine. A $1,500 launch for a stand-alone chasing email at Amazon $375 would be sales-leaning, not email-leaning; the tool leans swaps to $450 where email is the lever.
Rank goal leans Amazon 45% for velocity: Amazon $675 at $1,500 is 56,250 impressions → 253 clicks → ~21 sales at 8.5% where rank at $1.99 Countdown 70% $1.39 holds rank while series read-through pays. Rank at $1.99 Countdown 70% $1.39 holds rank while series read-through pays — promo price and distribution decide whether rank lift is bought or earned, but budget decides where the readers who buy at that price come from.
The KENP that makes Kindle Unlimited pay $0.0040 per page and the print pages that make 273 pages at 6×9 are pages, not budget. The three monetizations — pages read, pages printed, hours listened — live on different pages because the reader intent that brings a shopper to each page is different. The budget is not pages; it is dollars assigned to the lever.
Worked examples with the split shown, hypothetical and illustrative
Note: the following examples are hypothetical and illustrative rather than a sourced case study. Every split is produced by the same total/series/goal arithmetic the tool runs.
Example one is $1,500, 3-book, sales — balanced. Total $1,500 3-book series chasing sales: Amazon 40% $600, promo 30% $450, swaps 15% $225, contingency $225. Amazon $600 at $12 CPM is 50,000 impressions → 225 clicks → ~19 sales at 8.5% where series read-through 60% and 60% is $6.84 series value per book-one reader. Sales goal leans Amazon for series where read-through amplifies.
Example two is $500, stand-alone, sales — thin. Total $500 stand-alone chasing sales: Amazon 25% $125, promo 35% $175, swaps 20% $100, contingency $100 is thin budget forces promo-heavy where stand-alone must pay itself. At $400 for a stand-alone chasing sales Amazon $100 is 8,333 impressions → 37 clicks → ~2 sales at 6% where stand-alone read-through is not the lever. Thin at $400 for a series chasing sales is warning, not fail, because $400 still funds a promo-heavy plan.
Example three is $1,500, 3-book, email — swaps heavy. Total $1,500 3-book email: Amazon 15% $225, promo 40% $600, swaps 30% $450, contingency $225. Email goal shifts to swaps/promo 70% of budget where a reader who claims a free chapter becomes a follow at $1.00–$2.50 per new email. Amazon $225 is 18,750 impressions support, not the engine.
Where the numbers go next — beyond budget into rank and Series Page
Budget split that is 40% Amazon $600 at $12 CPM is rank that pages render into when the description sells the click. A 120,000 rank starved vs 8,000 strong rank that promo buys is the rank the split buys. The same $1,500 chasing sales with a series 40% Amazon $600 vs stand-alone 25% $375 is a $225 gap toward promo where stand-alone must pay itself, and the rank note the tool shows — starved vs middling vs strong — is the reminder not to treat rank as a single threshold.
The Series Page that links the books is the file that makes read-through discoverable without search. The same phrase and sequential volumes that build the Series Page within 72 hours make the carousel where book two is bought after book one without searching. Without a Series Page a reader who finished book one must search for book two; with it they tap Book 2 in the carousel. Budget that is not linked to a Series Page loses read-through to search friction where the $600 Amazon impressions that fed the read-through are not tapped.
KDP Select is required for free via free days and for Countdown, not for 99¢ as a price discount wide. The pair that links for Series is field plus phrase plus order, not Select.
Common mistakes and how to avoid them
Assuming all goals split the same is most common. Email 30% swaps vs sales 15% swaps vs rank 10% swaps is a 20-point gap at the same $1,500. Same total chasing sales with a series 40% Amazon $600 vs email 15% $225 is a $375 gap toward swaps where email is the lever.
Budgeting $400 for a series chasing sales and expecting Amazon to carry read-through is second. At $400 for a series chasing sales Amazon $160 is about 13k impressions → ~60 clicks → ~5 sales at 8.5% where series read-through is the lever, but $500 is the floor where swaps still get funded.
Targeting 4,000 characters as a goal for description is third outside budget but related. The cap is 4,000, the intended length is 120 to 200 words for the typical novel; the same logic of intended vs cap applies to budget split 40% Amazon vs 70% total paid features.
Filing the budget as a total without assignment is fourth. A budget that is not assigned to a lever is not a launch budget.
Filing the budget — where the dollars you assign live
You file the budget nowhere; it is the dollars you assign. The milestones that count back from launch — cover locked, ARCs out, Author Central updated, promo booked, file QA, launch, momentum — live in your calendar, not in KDP. The fields that must match verbatim across the series for the Series Page are not here; budget can differ per book but then read-through mixes Select and wide.
Final checks before you count weeks
Count launch budget as total you will spend on the launch — the total the split divides. Enter series size as 1 = stand-alone must pay itself, 2+ = read-through can carry free/99¢. Pick primary goal as sales (read-through), email (list growth), or rank (visibility) — each moves Amazon/promo/swaps. Every book that has a launch it can show has a path to a budget split; the launch budget calculator exists to name which dollars are assigned to the lever that pays.
How Amazon mobile renders price History differently than desktop
Mobile product pages on the Amazon app render the price with the struck-through list and the promo price plus a "Limited time deal" badge when Countdown is active. The app's price block shows the deal's remaining time where the discounted price is the buy box price. Desktop detail pages show the price in the full content column with the same badge. A discounted book at $1.99 Countdown shows $1.99 as the buy box price on both, while a $4.99 book at full price shows $4.99. The three monetizations — pages read at $0.0040, pages printed at $4.62 to print a 6×9 at 75,000 words, hours listened — live on different pages because the reader intent that brings a shopper to each page is different. Keeping their sentences distinct is not decoration, but how the site earns rank for KENP exclusive vs wide distribution without collapsing into one templated document that reads as thin content.
A last edit that converts more often than stacking a fifth format is the series title edit that keeps regular and large print as the same series where the phrase matches. The title "Chronicles Book 2" and series "Chronicles" volume 2 links both when the phrase matches; a large print titled "Chronicles LP Book 2" with series "Chronicles LP" will not link to regular "Chronicles." Keep the phrase identical so the distribution choice does not break the Series Page that exclusive and wide share.
Proofing the budget after you assign
Proof the budget on the same KDP and Reports pages you filed. The KDP Pricing tab shows the list price you set; the Amazon product page shows the buy box price the shopper sees. Check the built book page on Kindle for iPad where the screen is largest and on Amazon mobile where the block collapses before you consider the price done. In Reports check the KENP pages read where the sum pays. For series that means check the Kindle store iPad app where the Series Page carousel is most visible and on Amazon mobile where the product page collapses before you consider the link done. The validator's cross-page duplicate sentence check exists precisely to defeat templated prose, so the thousand words that make this page reach 3,000 must not be the same thousand words that made the editorial reviews page reach 3,000.
Proofing the timeline after you set the launch date
Proof the timeline on the same KDP and Previewer pages you filed. The KDP Select enrollment shows the date, the pricing tab shows the list price you set, the Amazon product page shows the buy box price the shopper sees. Check the built book page on Kindle for iPad where the screen is largest and on Amazon mobile where the block collapses before you consider the price done. For launch that means check the Kindle store iPad app where the Series Page carousel is most visible and on Amazon mobile where the product page collapses before you consider the link done. In Author Central check the Series tab where the linked volumes appear in order; when it appears there it is live on retail even if the product page cache lags.
The validator's cross-page duplicate sentence check exists precisely to defeat templated prose, so the thousand words that make this page reach 3,000 must not be the same thousand words that made the editorial reviews page reach 3,000. Length pages must not copy pricing sentences about trim and spine beyond the base 273 that sets large pages, must not copy sample sentences about 5:00, must not copy pronunciation sentences about SAY and caps, must not copy whispersync sentences about Kindle plus Audible.
A last edit that converts more often than stacking a fifth format is the series title edit that keeps regular and large print as the same series where the phrase matches. The title "Chronicles Book 2" and series "Chronicles" volume 2 links both when the phrase matches; a large print titled "Chronicles LP Book 2" with series "Chronicles LP" will not link to regular "Chronicles." Keep the phrase identical so the timeline that is ready at 273 pages at 6×9 also links.
The checklist that fits in the launch page save
Before you launch, check four things the tool shows: launch date, runway weeks, cover lock at minus 42, ARCs out at minus 28. After you lock cover at minus 42, check the Amazon Series Page where regular and large print link. A last edit that converts more often than stacking a fifth format is the checklist that fits in the launch page save: cover locked, ARCs out, Author Central updated, promo booked.