Conservative estimates · ap-southeast-2 (Sydney) · Jun 2026 · Real
production billing + 139 AI token samples (P90)
AUD
AWS Cost / practice / month
Infra (fixed)—
Infra (variable)—
AI (Bedrock)—
Total cost—
Revenue / practice / month
Practice fee—
Advisors—
Admins—
Clients—
Total revenue—
Profit & Margin / practice /
month
Gross Profit
—
Margin
—
Pricing Package
Fees (AUD)
A$50
A$25
A$10
Client Fee Bands
Band
Clients
A$/client/mo
Team per practice
2
2
100
Practice fee is monthly recurring
AI cost included in price
AI Job Volumes (jobs / month)
Unit Economics — 1 Practice
Practice count: 1
Scale Projection
Revenue and cost trajectory as practices grow. Fixed overhead amortises rapidly —
margin improves at scale. All figures in AUD.
Revenue vs AWS cost by practice count (AUD)
Gross margin % by practice count
Practices
Revenue/mo
Infra cost
AI cost
Total cost
Profit
Margin
Infrastructure Cost Structure
May 2026 actuals · ~1.5 active practices · ap-southeast-2 · USD costs converted to AUD at
current rate
Cost breakdown by service (May 2026)
Service
May (USD)
May (AUD)
Type
Per practice (AUD)
Variable cost per practice: — (conservative; USD $3.00 × rate).
Fixed overhead: —/mo shared — amortises rapidly at scale.
AI Feature Costs
Adjust monthly job volumes to model usage scenarios. Token data from production logs (P90 conservative — 139
samples).
Total AI cost / practice / month (AUD)—
Actual AWS Billing — Validation (USD)
Bedrock vs Infrastructure spend (Mar–May 2026, USD)
Month
Bedrock (USD)
Infra (USD)
Total (USD)
Note
Mar 2026
$13.61
$5.59
$75.16
Incl. $48 domain + dev costs
Apr 2026
$36.31
$7.35
$48.04
—
May 2026
$29.20
$10.16
$43.30
—
March anomaly: $75.16 total includes a $48 one-time annual domain charge and ~$13.50 in US
East dev/test costs. Normalised AU infra is $5.59. Infra trend Mar→May: $5.59 → $7.35 → $10.16 reflects S3
accumulation.
Free Tier Scale Thresholds
Lambda, Cognito, CloudWatch, SNS, KMS all billed $0.00 in May 2026. Current usage at ~1.5 practices.
Service
May usage
Free limit
Breaks free tier at
Lambda
23,907 GB-Sec (6%)
400,000 GB-Sec/mo
~25 practices
Cognito
898 MAU
50,000 MAU
~83 practices
CloudWatch Logs
0.57 GB-Mo
5 GB/month
~13 practices
SNS
74 notifications
1,000/month
~20 practices
Cost Optimisation Opportunities
Prompt caching — Compliance Coach ~40% AI saving
165K input tokens per call with zero caching. System prompt is ~70K constant tokens across all calls.
Scenario
Cost / call (AUD)
Current (no cache)
—
With prompt caching
—
Saving per call
—
Prompt caching — AI Reports ~40% AI saving
134K input tokens per call with a large fixed template. Caching could save 40–50% on repeat calls within
the TTL window.
Scenario
Cost / call (AUD)
Current (no cache)
—
With prompt caching
—
Saving per call
—
Model tiering — extraction tasks ~80% saving on
sub-task
Action item extraction runs on Sonnet at $3.30/M input. Claude Haiku 3.5 costs $0.80/M input — same
quality for short extraction tasks.
Model
Cost / extraction (AUD)
Sonnet 4.5 (current)
—
Haiku 3.5
—
Saving per call
—
S3 lifecycle policy Ongoing cost risk
45 GB stored in S3 as of May 2026 (~30 GB/practice) with no expiry rule. AI outputs accumulate
indefinitely — S3 nearly doubled Mar→May. Recommend: S3-IA after 90 days, Glacier after 365 days.
Estimated saving: 40–60% of storage costs at steady state.