The short answer: mail monthly at minimum, then add pace with releases
A working default is 2 emails a month for an author releasing 2 books a year to a list near 2,500 readers. One monthly broadcast keeps your name familiar, and the second send carries extra value such as a chapter excerpt, a short story, or early cover news. Authors with zero releases planned can hold 1 send a month and stay remembered. Authors releasing 6 or more books a year can justify 3 sends a month because fresh titles supply genuine news. The planner above applies this exact logic: recommended sends equal 1 plus releases per year divided by 3, rounded, clamped between 1 and 8. Compare that number with what you send today, and the gap tells you whether churn risk comes from overmailing or from silence.
Every send costs unsubscribes, and every skipped month costs attention. A list mailed far above its plan bleeds future buyers; a list mailed far below it keeps subscribers while losing their attention, which stays invisible until launch week. Hold the recommended pace for a full quarter, then adjust from real opens and replies.
How the planner math works, step by step
The tool takes three inputs: list size, books released per year, and emails sent per month right now. List size means addresses you can legally email today, meaning buyers and confirmed subscribers, never social followers. Releases per year means finished books reaching publication in the coming twelve months, not drafts or wishes. Current sends per month means broadcasts plus automated sequence emails in an ordinary month, excluding launch-month spikes.
Recommended sends come from releases through a simple formula: start at 1, add releases divided by 3, round to the nearest whole number, and clamp the result between 1 and 8. An author with 2 releases gives 1 plus 0.67, which rounds to 2 sends a month. An author with 0 releases gives exactly 1. An author with 6 releases gives 1 plus 2, which is 3. An author with 12 releases gives 1 plus 4, which is 5. The clamp at 8 exists because even the most prolific author should split excess news across segments rather than blasting one list daily.
The gap equals current sends minus recommended sends. A gap of zero earns the low-risk verdict. A positive gap of 2 or 3 triggers an elevated warning, and a gap of 4 or more triggers the high-risk result. A negative gap of 3 or more triggers the going-cold warning. Large lists get one extra rule: a list of 10,000 or more sent below its plan draws a quiet-list warning even at a small gap, because the absolute volume of wasted impressions is large.
Unsubscribe estimates use 0.3 percent per send as an illustrative planning assumption, not a measurement of any real list. Multiply list size by 0.003 to get illustrative unsubscribes per send, then multiply by sends per month for the monthly cost. A 2,500-reader list loses about 8 readers per send, since 2,500 times 0.003 equals 7.5, rounded to 8. Mailed twice a month, that list loses about 16 readers monthly. Mailed five times, it loses about 40. Monthly reach equals list size times sends: the same 2,500 list reaches 5,000 inboxes at 2 sends and 12,500 at 5. Reach is not engagement; it is the volume your cadence produces.
Worked numbers: three authors through the formula
Consider an author with 2,500 readers, 2 releases a year, and 2 current sends a month. Recommended sends equal 1 plus 2 divided by 3, rounded, which is 2. The gap is zero, so the verdict is low risk. Per-send unsubscribes are 2,500 times 0.003, about 8. Monthly illustrative unsubscribes are 8 times 2, which is 16. Monthly reach is 2,500 times 2, which is 5,000 inbox deliveries. The send map shows 1 broadcast plus 1 evergreen sequence slot, and the advice is to hold the pace for three months.
Now move that same author to 5 sends a month with everything else unchanged. Recommended sends stay at 2, so the gap is plus 3, which triggers the elevated warning. Monthly illustrative unsubscribes rise to 8 times 5, which is 40. Monthly reach rises to 2,500 times 5, which is 12,500. The plan costs 16 unsubscribes a month while the current pace costs 40, so the extra 3 sends buy 7,500 more deliveries at a cost of 24 extra departures. The recommendation is to cut or merge the weakest sends until current equals 2 again.
Third, consider an author with 4,000 readers, 1 release a year, and 0 sends a month. Recommended sends equal 1 plus 1 divided by 3, rounded, which is 1. Zero sending triggers the dormant-list warning regardless of the gap. Monthly unsubscribes are zero, which looks good until you notice monthly reach is also zero. The planner advises starting with 1 broadcast a month — one short update plus one clickable item — before stepping toward anything faster. Zero unsubscribes on a silent list is not health; it is the absence of contact.
Illustrative example: the cozy mystery author rebuilding rhythm
This first hypothetical example is illustrative, meaning the numbers are invented to show the method rather than drawn from any real account. Picture an author writing cozy mysteries with 3,200 readers, 3 releases a year, and a current habit of 1 send a month. Recommended sends equal 1 plus 3 divided by 3, which is exactly 2. The gap is minus 1, so the verdict lands near the plan with a nudge upward rather than a warning. Per-send unsubscribes are 3,200 times 0.003, about 10. Current monthly cost is about 10 departures for 3,200 deliveries. Moving to 2 sends doubles deliveries to 6,400 for about 20 departures.
Her practical fix is small: keep the existing monthly update, then add one evergreen sequence email that new subscribers receive automatically and the full list gets once as a broadcast. That second send could be a deleted scene ending with a question that invites replies. Replies matter because they signal attention, which is exactly what a quiet list is losing. After eight weeks she compares replies and launch-week opens against the old rhythm. If unsubscribes run far above the illustrative 20 a month, she fixes content before blaming frequency, because dull mail at any pace drives exits.
Hypothetical example: the rapid-release romance author over the limit
This second hypothetical example is also illustrative, with invented figures chosen to demonstrate overmailing. Imagine a romance author with 9,000 readers, 6 releases a year, and 8 sends a month. Recommended sends equal 1 plus 6 divided by 3, which is 3. The gap is plus 5, which triggers the high-risk verdict. Per-send unsubscribes are 9,000 times 0.003, which is 27. Current monthly cost is 27 times 8, which is 216 illustrative departures. The planned pace of 3 would cost 81. The difference is 135 readers a month who might have bought the next three releases.
His repair starts with ranking the 8 sends by purpose: launch announcements, excerpts, sale alerts, bonus epilogues, personal chatter, roundup forwards, crossover promos, and habit mail sent because the calendar said so. The bottom three merge into a single monthly roundup, cutting 8 sends to 6. Crossover promos move to a dedicated segment of past promo-clickers, cutting full-list sends to 4, and one more merge reaches the planned 3. The same books now reach nearly the same buyers with roughly a third of the list-wide cost.
Reading your verdict without overreacting
A low-risk result means your pace matches your release output, not that your emails are good. Keep the schedule and shift attention to content: subject lines naming one concrete thing, openings under fifty words, exactly one action per email. Judge the quarter by replies and launch-week opens.
An elevated warning means you send 2 or 3 more emails than releases justify. Do not delete everything at once. Rank last month's sends by clicks and replies, cut the weakest one, and merge two middling ones into a single stronger issue. Wait a full month, then cut again if the warning persists. Each removed send on a 2,500 list saves about 8 departures monthly while sacrificing 2,500 deliveries, so make the remaining sends denser with value. One generous issue outperforms two thin ones at the same cost.
A high-risk result means the gap is 4 or more, and the list is paying heavily for volume. Halve full-list sends immediately, move niche content to segments, and protect launch announcements above all else. If per-send unsubscribes fall back toward 0.3 percent after the cut, the pace was the poison; if they stay high, audit subject lines and targeting instead.
A going-cold or dormant warning means the risk is invisibility rather than exits. Add sends slowly, one per month, because a silent list shocked with weekly mail produces a spike of departures that frightens the author back into silence. Start with news readers actually want: cover reveals, release dates, and short fiction. Expect the first resumed send to show above-average unsubscribes as dead addresses clear out; the second and third sends reveal the true pace.
At 10,000 readers and above, each unused send wastes five figures of impressions. Offer a clear stay-or-go choice, remove chronic non-openers per your provider's guidance, and rerun the planner with the cleaned number.
The monthly send map: broadcasts plus one sequence slot
The timeline block in your result shows the shape of a month, not just its count. For a recommended pace of 1, the map is a single broadcast carrying the month's news and one action. For 2, the map is 1 broadcast plus 1 evergreen sequence slot, meaning one timely letter plus one durable email that serves new subscribers automatically and can go to the full list once. For 3, the map is 2 broadcasts plus 1 sequence slot. The pattern continues upward: all but one send are timely broadcasts, and one slot stays evergreen.
Broadcasts carry dated material: release announcements, preorder openings, sale windows, and cover reveals. Sequence emails carry durable material: reader magnets, series starters, and reading-order guides. Sequences compound — a welcome email written once serves every future subscriber — while broadcasts expire.
Extra sends above the plan appear on the timeline as flagged items. Each one asks a question: does this send reach a segment that asked for it, or the whole list by default. Segment-targeted extras are usually defensible; a bonus epilogue to series finishers delights buyers without taxing the full list. Full-list extras need stronger justification, such as a price drop with a real deadline. When in doubt, fold a planned extra into the next broadcast as a paragraph. The news still travels, and the unsubscribe cost stays at zero.
Edge cases the formula handles badly without your judgment
Zero releases with a large backlist is the first edge case. The formula prescribes 1 send a month, which suits attention maintenance, but seasonal sales can justify a temporary second send. Run the extra send to buyers of that series only, not the entire list, and retire it when the promotion ends. Backlist depth is an asset for segmentation, not a license for permanent frequency.
Preorder periods form the second edge case. The month before launch and launch month itself can each carry 1 to 2 sends above plan without invalidating the baseline. Return to plan the following month even if launch sales tempt you to keep shouting.
Collaborations and box sets form the third edge case. Joint promotions often pressure every participant to mail the full list repeatedly. Agree in advance how many list-wide sends each author owes, ideally one announcement plus one reminder, and put overflow into segments of proven promo-clickers. A box set that costs each partner hundreds of unsubscribes was priced too high in attention. Partners who demand unlimited sends are spending your asset.
New lists under 500 readers form the fourth edge case. The formula still returns a pace, but tiny lists produce jumpy percentages — a single unsubscribe reads as a crisis. Send the recommended minimum and spend spare energy on list building: guest posts, reader magnets, and swap partnerships. Do not over-interpret one month of data from a few hundred people.
New-subscriber bursts form the fifth edge case. A welcome sequence of 3 to 5 emails over two weeks sits outside the monthly broadcast count, provided it fires per subscriber rather than to the whole list. If half your list joined this month through a promotion, expect elevated unsubscribes regardless of pace.
Failure modes: how authors break cadence in practice
The most common failure is launch-only mailing: three emails in release week, then silence for five months. Each launch then pays a reintroduction tax of confused readers and spam complaints from people who forgot subscribing. The repair is monthly mail between launches, and it works within two cycles.
The second failure is apology-led mail, where every issue opens by confessing lateness. Apologies train readers to associate your name with guilt rather than value. Replace the apology paragraph with one useful item: a recommendation, a short anecdote tied to the book's subject, or a direct question. Consistency going forward erases the past faster than any apology.
The third failure is content drift, where the newsletter becomes a diary disconnected from the books. Personal touches build loyalty, but a writing newsletter must ultimately direct attention toward reading. Tie each issue to at least one bookish action: an excerpt, a reading-order guide, or a question whose answers shape a future story. Readers subscribed for books; feed that interest first.
The fourth failure is metric panic, where one bad send triggers a strategy overhaul. Single-issue swings usually reflect subject lines, timing, or inbox competition that week, not the collapse of your readership. Change one variable at a time and give each change three issues. Authors who rewrite the whole program monthly never collect a clean reading on anything.
The fifth failure is provider blindness: never checking which addresses bounce or which segments never open. Mailing chronic non-openers depresses deliverability for engaged readers. Consult bounce and dormancy reports quarterly and remove the dead weight.
Genre-specific guidance for pacing your sends
Romance authors often release fastest, and rapid releases legitimately support 3 to 4 sends a month. Series tropes, couple spotlights, and bonus epilogues give each send distinct content, which is the real constraint — frequency without distinct payloads still burns goodwill. Use segments aggressively: new-release alerts to the full list, trope-specific extras to proven clickers. Watch post-promo months for churn that reflects source quality rather than cadence mistakes.
Thriller and mystery authors usually release 1 to 3 books a year, placing them at 1 to 2 sends a month. The genre's advantage is curiosity mechanics: cold-case files, redacted excerpts, and puzzles translate naturally into clickable issues. Short bonus scenes ending on unresolved tension outperform long plot summaries. Around launch, a two-send sequence — announcement plus a short reminder — fits reader expectations without oversending.
Fantasy and science fiction authors should split worldbuilding into monthly artifacts under 300 words rather than rare epics, and keep a permanent evergreen email covering series reading order so newcomers never stall.
Nonfiction authors hold a different contract: readers subscribed for a result, so cadence should track usefulness. One instructional send a month — a method, a case walkthrough, a worked example — sustains authority between books. Tie each issue to the book's promise explicitly, showing how the free lesson connects to the paid system. Evergreen sequences matter enormously here; a five-part starter course can sell the backlist for years.
Memoir and literary authors often release slowly, sometimes one book every few years. The formula's minimum of 1 send a month still holds, filled with essays, reading notes, and event news rather than purchase prompts. These readers reward voice-driven mail, so a reflective letter with one vivid scene can outperform a newsy roundup. Between books, borrow structure from serial forms: a monthly theme, a recurring recommendation slot, a standing question to readers.
Children's and middle-grade authors write for young readers but email adults: parents, teachers, and librarians. Keep the monthly broadcast practical with classroom uses and gift-season reminders. One evergreen sequence covering age ranges and reading order prevents the most common confusion. Frequency above 2 a month rarely pays here except in the holiday quarter.
Growing the list while you mail it
Cadence planning assumes subscribers keep arriving; without inflow, even perfect pacing manages a decline, since every send costs a few departures. Dedicate effort each quarter to one growth lever: a reader magnet refresh, a swap partnership block, or a live event with a signup sheet. Growth and cadence are one system: inflow funds the outflow that attention requires.
Design the welcome sequence separately from broadcast cadence. Three to five short emails across ten days, each with one action, orient newcomers better than any single magnet file. After the sequence ends, fold newcomers into the broadcast rhythm. Never leave a new subscriber in a month of silence.
Once a year, run a re-engagement pass. Identify addresses with no opens across six months and send a short choice series: stay with one click, update preferences, or leave quietly. Authors dread the smaller number, but mailbox providers route mail from owners with strong engagement more generously. A cleaned list of 2,000 regularly beats a dormant list of 5,000 at launch.
The questions behind the questions
Authors rarely ask only how often to send; they ask what the number defends them against. The fear behind overmailing questions is being marked as spam by humans who once liked the books. That fear is rational, and the defense is segmentation rather than silence: keep full-list sends at plan and give extra material to volunteers. Permission for more mail must be demonstrated by clicks, never assumed from subscription alone.
The fear behind undermailing questions is usually time, not strategy. Writing the newsletter feels like stealing hours from the novel. Derive issues from work already done: cut excerpts, reuse research outtakes, answer one reader email publicly. A monthly issue assembled from existing material in ninety minutes beats a quarterly masterpiece that never ships. Treat the newsletter as useful output from energy already spent rather than a second job.
Deliverability questions hide inside cadence questions more often than authors realize. Sending to stale addresses or mailing people who never confirmed produces bounces and complaints that punish even engaged readers' placement. No cadence fixes poisoned hygiene. Confirm new subscribers where your rules require it, never add buyers of unrelated products without clear consent, and honor unsubscribes instantly. The planner's numbers assume a consented list; feed it anything else and every output misleads.
Timing questions — which weekday, which hour — matter far less than regularity. Weekday mornings in the readers' timezone beat weekend nights for actions like clicks and purchases; Sundays suit reflective essays that ask only to be read. Avoid major asks on public holidays unless the holiday is the angle. Above all, keep the same week each month so readers develop a habit slot for you. Predictability is a feature of media people keep.
Absence questions arise after life interrupts mailing for a quarter or more. Resume with a single short reconnection issue before any selling: where you have been in one sentence, what is coming, and one gift such as a short story. Then wait two weeks before the next send rather than firing apologies and offers in a barrage. Lists forgive absence faster than they forgive a volley, and the re-engagement pass described earlier handles the truly dormant fraction.
Tooling questions — which provider, which template — are the least important and the most asked. Any established provider with automation, segments, and honest reporting serves an author list well into five figures. Choose on price and editor clarity, then stop shopping. Migrating mid-year costs more attention than any feature repays.
Tracking these numbers inside Author Desk
Cadence decisions compound across quarters, which is why they deserve a permanent home rather than a one-off calculation. Author Desk at /author-desk is where you keep these figures visible month to month: current sends against the recommended pace, list size after cleanings, and launch dates that justify temporary extras. Revisit the planner whenever releases shift or the list jumps, since both inputs move the recommendation. A schedule kept inside your regular workflow survives busy seasons that memory alone will not.
Treat the Desk as the place where inflow and outflow meet. Growth efforts add subscribers on one side while each send's illustrative cost removes a few on the other, and watching both together shows whether the list is compounding or merely churning. Log which send types earned replies each month so future cuts remove the right items. Over a year, that record becomes a personal benchmark no generic study can replace, because it reflects your own readers.
A simple next-month plan
Run the planner once with honest inputs and write the recommended number on a calendar. Draft each issue's single action before drafting its body, so every send justifies its unsubscribe cost in advance. Schedule broadcasts a week ahead to remove deadline panic, and prepare one evergreen sequence email that outlives the month. At month's end, compare actual unsubscribes with the illustrative estimate and note the direction. Then repeat. Cadence is a habit wearing a formula's clothes, and habits are built one kept appointment at a time.