A FINANCIAL MANIFESTO FOR PODCASTERS

Stop guessing what to charge sponsors. Know what your podcast is actually worth.

Track every dollar to the episode that earned it. Get a sponsor rate built from your own performance — not generic CPM benchmarks. AI does the data entry. We never connect to your bank, your Stripe, your Patreon. Your money is your business.

The promise FOR independent podcasters
WITH 5K–100K downloads
WHO negotiate their own deals
WANT defensible rates
BUT have nowhere to start

TRY IT

▸ THE 30-SECOND DEMO · NO SIGNUP

Show me what my show is worth.

Pick your niche. Tell us your average downloads. We'll show you what to charge.

Niche

Avg downloads / ep

Currency

YOUR MINIMUM RECOMMENDED RATE

PER MID-ROLL

—

Industry percentile

—

Your CPM at recommended rate

—

Rate range in your niche

"Based on the performance of shows in your niche at this download tier, you should be charging at least the rate above. This is your defensible floor."

Get this for your real show

↑ Stub benchmarks shown. Connect your RSS in CastMath for personalised numbers from your own top-quartile episode.

SECTION I · THE FRICTIONS

Three things every podcaster wastes time on.

FRICTION ONE

You don't know what to charge sponsors.

So you guess. Or ask in Slack. Or copy a number from a 2019 blog post. Sponsor pushes back. You drop the rate. They sign. You suspect you left money on the table. You probably did.

FRICTION TWO

You don't know which episodes make money.

Some bring in $2,000 sponsors. Some cost $400 to produce and earn nothing. Your hosting platform shows downloads. Your bank shows deposits. Your inbox shows invoices. Nothing connects them.

FRICTION THREE

Tax time is a panic.

Revenue is in five places. Costs are buried in your inbox. You build a spreadsheet from scratch every June. You miss deductions. You over-pay. You promise to do it differently next year. You don't.

SECTION II · THE FIX

CastMath does three things.
The first one is the killer.

PILLAR · THE WEDGE

Sponsor Rate Calculator

Tells you what to charge based on your top-quartile episode. Connect your RSS. Pick your niche. Enter what 2 past sponsors paid you. In under 5 minutes, CastMath shows you your defensible minimum rate, your industry percentile, and how much you've left on the table. You walk into your next sponsor call with numbers a sponsor can't argue with.

PILLAR · THE LEDGER

Episode-level P&L

Every dollar tracked to the episode that earned it. Voice: "ACME paid me eighteen hundred for episode 47." Done. Photo: snap of a bank deposit. AI reads it. Asks which episode. Email: forward the payment notification. AI parses it. See profit per episode. See which formats pay. See where the time goes.

PILLAR · THE FORECAST

Tax + cashflow forecasts.

Country-aware, no surprises. Tax forecasts at launch: US (Schedule C), UK (Self Assessment), AU (BAS / GST). Cashflow forecasts use only confirmed sponsors and recurring income. No speculative numbers. Know what to set aside before you spend it.

We connect to your podcast host for download stats. That's it. Your money is your business — CastMath helps you record and understand it, never reaches in to grab it.

— THE TRUST PROMISE

SECTION III · PRICING

Pricing for podcasters who want to know what they're worth.

Solo

$39/mo

Single show

Episode P&L, basic sponsor pipeline, tax forecast.

Pro

$99/mo

1–3 shows

Sponsor Rate Calculator. Advanced reports. Unlimited integrations.

Studio

$299/mo

3–15 shows

Multi-show, multi-host invoicing splits, custom reports.

Network

$1K+/mo

15+ shows

API access. White-label. Advanced compliance. SSO.

SECTION IV · BUILT BY ASTERIS

Built by a Sydney studio,
by a podcaster, for podcasters.

CastMath is built by Built by Asteris — a small Sydney studio building tools for solo creators. Solo founder. AI-assisted build. Transparent roadmap.

We ship what we use. We listen to founding members. We charge fairly.

Colophon

STUDIO: Built by Asteris
FOUNDER: Nick Lord
BASE: Sydney, AU
APPROACH: AI-assisted build
STACK: Cloudflare-native
PROMISE: Transparent roadmap

SECTION V · QUESTIONS

Things you'll
probably ask.

When does CastMath launch?

Sprint 1 starts when our validation gate clears. Founding members get early access in 6–10 weeks.

What podcast hosts does it integrate with?

At launch: Buzzsprout, Transistor, Captivate. RSS feed for everyone else. We never integrate with anything that touches money.

Does it work outside the US?

Yes. Tax forecasts at launch: US, UK, Australia. Currencies: USD, GBP, AUD, EUR. Other tax regimes follow customer demand.

What about my data?

Stored encrypted in Cloudflare. We don't sell it. We don't share it. We don't train AI on it. Export or delete anytime.

Why should I trust a brand I haven't heard of?

You shouldn't, yet. That's why founding member pricing exists — try it for 6 months at half price. If it doesn't pay for itself, leave.

FOUNDING ACCESS

Be the first 100.
Lock founding pricing forever.

One email. Sixty seconds. When CastMath ships, you're first in.

83 of 100 founding spots remaining