TBK Logs — Financial Model & Projections

1 Executive Summary

TBK Logs is a platform-agnostic engine datalog analysis platform that turns CSV log data from any tuning platform (BM3, MHD, EcuTek, COBB, standalone ECUs, and 20+ others) into actionable health reports, mod-path recommendations, and tuning insights. The platform serves two user types: Drivers (enthusiasts who want to understand their car's health) and Tuners (professionals who earn 70% referral revenue by directing clients to TBK Logs).

$75/mo

Total Fixed Costs

Customers to Break Even

26+ mo

Runway (Zero Revenue)

$2,000

Cash on Hand

Key Advantage: Ultra-Low Cost Structure As a solo founder leveraging free-tier infrastructure (Supabase, Vercel), TBK Logs has an exceptionally low break-even point. The primary challenge is not financial survival — it is customer acquisition in a niche market. The entire financial trajectory hinges on solving the signup problem.

2 Revenue Model & Pricing

Subscription Tiers

Tier	Monthly Price	What's Included	Expected Mix	Revenue Share
Starter	$9	Basic analysis, limited logs/month	55%	—
Pro	$50	Full analysis, mod-path, unlimited logs	30%	—
Premium	$78	Everything + priority, advanced insights	15%	—
Blended Gross ARPU	$31.65	0.55 × $9 + 0.30 × $50 + 0.15 × $78

Tuner Referral Revenue Model

Tuners refer their clients to TBK Logs and earn 70% of the referred user's subscription revenue. This is a powerful acquisition channel but reduces effective ARPU for referred users.

User Source	% of Paying Users	Gross ARPU	TBK Keeps	Net ARPU
Direct (organic, ads, community)	75%	$31.65	100%	$31.65
Tuner-referred	25%	$31.65	30%	$9.50
Blended Net ARPU				$26.11

Why $26 Effective ARPU Matters All projections below use the blended net ARPU of ~$26 (after tuner commissions). This is the real revenue per customer that funds the business. Gross metrics will look higher but this number drives sustainability.

3 Cost Structure

Fixed Costs (Monthly)

Category	Service	Monthly Cost	Notes
Infrastructure	Supabase (database, auth, storage)	$0	Free tier (500MB, 50K rows)
	Vercel (hosting, serverless)	$0	Hobby plan
	Domain + DNS	$1	Amortized annually
Tools	GitHub	$0	Free tier
Tools	Development tools (Cursor, etc.)	$24
Personnel	Founder salary / draw	$0	Not taking salary at launch
Buffer	Miscellaneous (10%)	$50	Unexpected costs
Total Fixed Costs		$75

Variable Costs (Per Paying Customer / Month)

Cost Component	Per User/Mo	Calculation
AI/LLM API (analysis engine)	$1.50	~5 analyses × $0.30 avg per analysis
Stripe payment processing	$1.22	2.9% + $0.30 on $31.65 gross ARPU
Email (transactional)	$0.01	~10 emails × $0.001
Incremental storage/compute	$0.27	Marginal Supabase/Vercel usage
Total Variable Cost	$3.00

Contribution Margin by Tier

Tier	Price	Variable Cost	Contribution Margin	CM %
Starter	$9.00	$1.86	$7.14	79%
Pro	$50.00	$3.75	$46.25	93%
Premium	$78.00	$4.56	$73.44	94%
Blended (net of referrals)	$26.11	$3.00	$23.11	88%

88% Contribution Margin Excellent software economics. Every paying customer after break-even contributes ~$23/mo directly to profit. This is the power of a low-infra software business.

4 Break-Even Analysis

Break-Even Customers

$104

Break-Even MRR

$1,252

Break-Even ARR

Break-Even = Monthly Fixed Costs / Contribution Margin = $75 / $23.11 = 3.25 customers → rounds to 4 paying customers.

Break-Even Sensitivity

How break-even shifts as the business evolves:

Scenario	Monthly Fixed Costs	Break-Even Customers	Break-Even MRR
Current (solo, free tiers)	$75	4	$104
+ Supabase Pro ($25/mo)	$100	5	$130
+ Vercel Pro ($20/mo)	$120	6	$156
+ Marketing budget ($200/mo)	$320	14	$364
+ Part-time contractor ($1,500/mo)	$1,820	79	$2,054
+ Founder draw ($3,000/mo)	$4,820	209	$5,426

The Inflection Point At your current cost structure, break-even is trivially achievable (4 customers). But the moment you want to pay yourself even a modest $3K/mo, you need ~209 paying customers. This is the critical planning number — it's where the business transitions from "side project" to "sustaining a person."

5 Conversion Funnel Model

Funnel Definition

Stage	Action	Rate (Base)	Notes
Visitor → Signup	Creates account	5%	High-intent niche traffic from forums, social, search
Signup → Activated	Uploads first log + views analysis	60%	Clear value moment: first analysis result
Activated → Paid	Subscribes to any tier	20%	High conversion — product delivers immediate, visible value
End-to-End: Visitor → Paying		0.6%	5% × 60% × 20% = 0.6%

Funnel Math (Base Case)

    500 visitors/month

      × 5% signup rate       = 25 signups

      × 60% activation      = 15 activated users

      × 20% conversion      = 3 new paying customers

      × $26 net ARPU         = $78 new MRR from this month's visitors

Your Bottleneck: Visitors, Not Conversion With 0.6% end-to-end conversion, you need ~167 monthly visitors per new paying customer. The conversion funnel is strong for a niche product — the constraint is getting those visitors in the first place. Every 100 additional monthly visitors = ~0.6 new paying customers = ~$16/mo MRR.

Highest-ROI Funnel Improvements

Improve This	From	To	Impact (new paid/mo)	Effort	Priority
Monthly visitors	500	1,000	+3 customers	High (content, SEO, partnerships)	1st
Activation rate	60%	75%	+0.75 customers	Medium (better onboarding)	2nd
Conversion rate	20%	30%	+0.75 customers	Medium (pricing page, trial UX)	3rd
Signup rate	5%	8%	+0.54 customers	Low (landing page optimization)	4th

6 12-Month Revenue Projections

Three scenarios based on different growth trajectories. All use the same unit economics ($26 net ARPU, $3 variable cost, $75/mo fixed costs).

Scenario Assumptions

Assumption	Conservative	Base	Optimistic
Starting monthly visitors	200	500	800
Monthly visitor growth	8%	12%	18%
End-to-end conversion	0.3%	0.6%	1.0%
Monthly churn	8%	6%	4%
Growth driver	Organic only	Organic + community	Tuner partnerships + content

Conservative Scenario — Organic Only

Relying purely on forum posts, Reddit, and word-of-mouth. No paid marketing, no tuner partnerships.

Month	Visitors	New Paid	Churned	Total Paid	MRR	Cumulative Rev
1	200	1	0	1	$26	$26
2	216	1	0	2	$52	$78
3	233	1	0	3	$78	$156
4	252	1	0	4	$104	$260
6	294	1	0	6	$156	$520
9	370	1	1	7	$182	$1,014
12	466	1	1	8	$208	$1,716

Base Scenario — Organic + Community Effort

Active in car forums, creating YouTube content, engaging on social media. Tuner referrals starting month 3+.

Month	Visitors	New Paid	Churned	Total Paid	MRR	Cumulative Rev
1	500	3	0	3	$78	$78
2	560	3	0	6	$156	$234
3	627	4	0	10	$260	$494
4	702	4	1	13	$338	$832
6	881	5	1	21	$546	$1,716
9	1,238	7	2	37	$962	$3,978
12	1,739	10	3	57	$1,482	$7,878

Optimistic Scenario — Tuner Partnerships + Content

Active tuner partnership program driving referrals, YouTube content gaining traction, SEO starting to rank.

Month	Visitors	New Paid	Churned	Total Paid	MRR	Cumulative Rev
1	800	8	0	8	$208	$208
2	944	9	0	17	$442	$650
3	1,114	11	1	27	$702	$1,352
4	1,314	13	1	39	$1,014	$2,366
6	1,830	18	3	70	$1,820	$5,200
9	3,006	30	5	136	$3,536	$13,168
12	4,939	49	10	243	$6,318	$30,160

Scenario Comparison at Key Milestones

Milestone	Conservative	Base	Optimistic
Break-even month (MRR > $75)	Month 3	Month 1	Month 1
Month 12 paying customers	8	57	243
Month 12 MRR	$208	$1,482	$6,318
Year 1 ARR (Month 12 MRR × 12)	$2,496	$17,784	$75,816
Year 1 cumulative revenue	$1,716	$7,878	$30,160
Time to $1K MRR	~24+ months	~9 months	~4 months
Time to "pay yourself" ($3K MRR)	Not in Year 1	Not in Year 1	~9 months

MRR Growth Visualization

Month 12 MRR comparison

Conservative

$208

Base

$1,482

Optimistic

$6,318

7 Runway & Cash Flow

Current Position

$2,000

Cash in Bank

$75/mo

Gross Burn Rate

26.7 mo

Runway (Zero Revenue)

12-Month Cash Flow (Base Scenario)

Month	Starting Cash	+ Revenue	- Expenses	Net Cash Flow	Ending Cash
1	$2,000	$78	$84	-$6	$1,994
2	$1,994	$156	$93	+$63	$2,057
3	$2,057	$260	$105	+$155	$2,212
4	$2,212	$338	$114	+$224	$2,436
5	$2,436	$442	$126	+$316	$2,752
6	$2,752	$546	$138	+$408	$3,160
7	$3,160	$650	$150	+$500	$3,660
8	$3,660	$780	$165	+$615	$4,275
9	$4,275	$962	$186	+$776	$5,051
10	$5,051	$1,118	$203	+$915	$5,966
11	$5,966	$1,300	$225	+$1,075	$7,041
12	$7,041	$1,482	$246	+$1,236	$8,277

Cash-Flow Positive from Month 2 (Base Scenario) Because fixed costs are so low, the business becomes cash-flow positive almost immediately. By month 12, you've grown from $2,000 to $8,277 in the bank — without any external funding. This is the beauty of a lean launch.

Cash Flow Milestones (Base Scenario)

Milestone	Month	Confidence
First revenue	Month 1	High — product is ready
Revenue covers infrastructure	Month 1	High — infra costs are ~$0
Cash-flow positive (monthly)	Month 2	High
Revenue could fund $200/mo marketing	Month 5	Medium
Revenue could fund part-time help	Month 10-12	Medium
Revenue replaces modest salary ($3K)	Month 18-24	Low — depends on growth

8 Unit Economics

Customer Lifetime Value (LTV)

Variable	Conservative	Base	Optimistic
Net ARPU	$26	$26	$26
Gross Margin	88%	88%	88%
Monthly Churn	8%	6%	4%
Avg Customer Lifespan	12.5 mo	16.7 mo	25 mo
LTV	$286	$381	$572

LTV = (ARPU × Gross Margin) / Monthly Churn = ($26 × 0.88) / churn rate

Customer Acquisition Cost (CAC) by Channel

Channel	Est. CAC	LTV:CAC (Base)	Assessment
Organic (SEO, forums, Reddit)	$0*	∞	Best channel — invest time here
YouTube / content	$0*	∞	Time cost only, high trust
Tuner referral program	~$22†	17:1	Excellent — built-in acquisition
Google Ads (if used)	$30-80	5-13:1	Good if keywords are affordable
Instagram/Meta Ads (if used)	$40-120	3-10:1	Viable but test carefully

* Time is the cost, not dollars. † Tuner CAC = 70% of first month's revenue from referred user.

Unit Economics Health Dashboard

$381

LTV (Base)

~$0

CAC (Organic)

88%

Gross Margin

< 1 mo

Payback Period

Unit Economics Are Exceptional With near-zero CAC (organic acquisition) and 88% margins, the per-customer economics are outstanding. The challenge is volume, not efficiency. Even if you eventually spend $50 CAC on paid ads, the LTV:CAC ratio remains a healthy 7.6:1.

LTV by Tier (Base Case: 6% churn)

Tier	Net ARPU	Lifespan	LTV	% of Users	Weighted LTV
Starter ($9)	$9	12 mo*	$95	55%	$52
Pro ($50)	$50	20 mo*	$880	30%	$264
Premium ($78)	$78	25 mo*	$1,716	15%	$257
Blended Weighted LTV					$573

* Higher tiers tend to have lower churn (more committed users). Starter estimated at 8% churn, Pro at 5%, Premium at 4%.

9 Funding Paths

Three realistic paths for TBK Logs given your current position. Each unlocks a different growth trajectory.

Path A: Bootstrap

$0 raise

Use existing $2K + reinvest revenue

26+ months runway at $0 revenue
Cash-flow positive by month 2
Conservative scenario trajectory
100% ownership retained
Limited to organic/free channels
No marketing budget

Year 1 Outcome

8-57 customers, $208-$1,482 MRR

Best If

Patient, building while employed, want to prove concept before investing

Recommended

Path B: Micro-Raise

$10K — $25K

Friends, family, angel, or revenue-based

$500-1K/mo marketing budget
Test paid channels (Google, IG)
Fund tuner partnership incentives
Attend 1-2 car events/meets
Base-to-optimistic trajectory
18-24 months aggressive runway

Year 1 Outcome

57-150 customers, $1,482-$3,900 MRR

Best If

Know someone who'd invest small, or can do a pre-sale / lifetime deal campaign

Path C: Accelerator

$50K — $100K

Accelerator, grant, or institutional angel

Dedicated marketing budget
Part-time developer/marketer
Tuner ambassador program
Conference presence
Optimistic scenario trajectory
12-18 months to prove model

Year 1 Outcome

150-250+ customers, $3,900-$6,300+ MRR

Best If

Strong PMF signals, willing to give equity, ready to commit full-time

Alternative: Pre-Sell to Fund Growth

Lifetime Deal / Annual Pre-Sale Strategy Instead of raising money, sell 50 lifetime deals at $149 each = $7,450 upfront. Or sell 30 annual Pro subscriptions at $399/year (33% discount) = $11,970. This funds your first year of marketing without giving up equity. Platforms like AppSumo or direct outreach to car communities could drive this.

What Each Funding Level Unlocks

Capability	$0 (Bootstrap)	$15K	$75K
Monthly marketing budget	$0	$500	$2,000
Paid ads testing	—	Google only	Multi-channel
Tuner partnership incentives	Revenue share only	+ Sign-up bonuses	+ Ambassador program
Content creation	DIY only	+ Basic video	+ Professional content
Events / car meets	Local free ones	1-2 paid events	Regular presence
Founder salary	$0	$0	$2-3K/mo (partial)
Part-time help	—	—	$1.5K/mo contractor
Time to self-sustaining	18-24 mo	10-14 mo	6-9 mo

10 Growth Levers: Solving the Signup Problem

You identified the core challenge: conversion is high, but getting eyeballs is hard. Here are the highest-leverage acquisition strategies ranked by cost and impact for TBK Logs specifically.

#	Strategy	Cost	Est. Monthly Visitors	Timeline	Priority
1	Tuner partnerships — give tuners a dashboard, free Pro access, 70% rev share. They send clients.	$0 (rev share)	100-500	Month 1-2	Highest
2	Forum presence — Bimmerpost, SpoolStreet, N54tech, Reddit r/BMWTech, r/cars. Answer questions, link to free analysis.	$0 (time)	50-200	Month 1+	Highest
3	YouTube content — "Is your tune safe? Here's how to read your datalog" explainer videos	$0 (time)	100-1,000	Month 3-6	High
4	SEO / blog — "N54 datalog analysis guide", "What do my boost numbers mean?"	$0 (time)	200-2,000	Month 4-8	High
5	Instagram / TikTok — before/after analysis screenshots, turbo pulls with overlay data	$0 (time)	50-500	Month 2+	Medium
6	Google Ads — "datalog analysis", "is my tune safe", engine-specific keywords	$300-500/mo	200-600	Immediate	Medium (if funded)
7	Car meets / events — Demo TBK Logs on someone's live datalog at a meet	$50-200/event	20-100	Seasonal	Medium
8	Product Hunt launch — one-time spike, captures enthusiast-developer overlap	$0	1,000-5,000 spike	One-time	Low (timing matters)

Focus Strategy: Tuner Network First The tuner referral model is your unfair advantage. Each tuner who adopts TBK Logs brings 5-20 clients/month. Landing 5 active tuners could generate 50-100 monthly signups — more than any other channel at zero ad spend. The 70% revenue share is expensive per-user, but the CAC is effectively $0 cash outlay.

11 Key Risks & Mitigations

Risk	Impact	Probability	Mitigation
Slow signup growth — niche market, limited awareness	High	Medium	Tuner partnerships as primary channel; doesn't require mass-market reach
AI API cost increase — OpenAI/provider raises prices	Medium	Low	Multi-provider strategy; can switch to open-source models; costs are small % of ARPU
High Starter-tier churn — $9 users aren't sticky	Medium	Medium	Strong activation flow; feature gates that demonstrate Pro value; consider $9 as gateway
Competitor enters market — established tuning platform adds analysis	High	Low	Platform-agnostic advantage; depth of analysis; move fast to build community moat
Free tier costs spike — if free users consume significant AI/compute	Medium	Low	Gate AI features to paid tiers; limit free analysis count; lazy-load analysis
Solo founder bottleneck — can't build + market + support alone	Medium	Medium	Automate support (FAQ, chatbot); use revenue to fund first contractor at ~$1K MRR

12 90-Day Action Plan

Month 1: Launch & Activate Tuner Network

1	Launch publicly — product is ready	Day 1
2	Reach out to 10-20 tuners you know or can find online — offer free Pro access + 70% rev share	Week 1-2
3	Post in 3-5 car forums (Bimmerpost, Reddit, SpoolStreet) with genuine value — not spam	Week 1-2
4	Set up basic analytics — track visitor → signup → activation → paid funnel	Week 1
5	Land first 3 paying customers	End of Month 1

Month 2: Validate & Iterate

6	Talk to every paying customer — what made them pay? What would make them recommend?	Week 5-6
7	Optimize activation flow based on drop-off data	Week 5-8
8	Create 2-3 YouTube videos or blog posts targeting high-intent keywords	Week 6-8
9	Decide: Bootstrap (Path A) or pursue micro-raise (Path B)?	End of Month 2

Month 3: Scale What Works

10	Double down on the acquisition channel that's working	Month 3
11	If Path B: begin conversations with potential angels / pre-sell campaign	Month 3
12	Target: 10+ paying customers, $260+ MRR, clear funnel metrics	End of Month 3

13 Monthly Metrics Dashboard

Track these numbers on the 1st of every month. They tell you if the business is working.

Metric	Formula	Target (Month 6)	Target (Month 12)
Monthly Visitors	Unique site visits	800+	1,500+
Signups	New accounts created	40+	75+
Activation Rate	Signups who complete first analysis	> 50%	> 60%
Paying Customers	Active subscribers	20+	50+
MRR	Monthly recurring revenue	$500+	$1,300+
Churn Rate	Cancelled / total paying	< 8%	< 6%
Active Tuners	Tuners who referred ≥1 user this month	3+	8+
Cash Balance	Money in the bank	> $2,500	> $5,000

A Appendix: Key Assumptions & Methodology

Assumption	Value Used	Source / Rationale
Pricing tiers	$9 / $50 / $78	Defined pricing strategy
Tier mix	55% / 30% / 15%	Industry pattern: most users start at lowest tier
Tuner referral %	25% of paying users	Estimated based on tuner network size
Tuner commission	70% of referred user revenue	Defined business model
AI cost per analysis	$0.30	Based on GPT-4o / Claude Haiku costs for structured analysis
Analyses per user/month	5	Active enthusiast estimate (1-2 per week)
Stripe fees	2.9% + $0.30	Standard Stripe pricing
Churn rates	4-8% monthly	SaaS industry benchmarks for B2C/prosumer
Seasonal adjustment	Not applied	Car tuning is somewhat seasonal (summer peaks) but insufficient data to model
Currency	USD	All figures in US dollars

Model Limitations

All visitor and growth numbers are projections — actual results will vary
Churn rates are estimates; real churn data will only emerge after 3-6 months of operation
Tier mix assumptions may shift significantly based on actual user behavior
Seasonal effects (car show season, winter storage) are not modeled but may be significant
The tuner referral model economics depend on tuner adoption rate, which is unproven
Infrastructure costs assume free-tier usage; scaling may trigger paid tiers earlier than modeled

TBK Labs

1 Executive Summary

2 Revenue Model & Pricing

Subscription Tiers

Tuner Referral Revenue Model

3 Cost Structure

Fixed Costs (Monthly)

Variable Costs (Per Paying Customer / Month)

Contribution Margin by Tier

4 Break-Even Analysis

Break-Even Sensitivity

5 Conversion Funnel Model

Funnel Definition

Funnel Math (Base Case)

Highest-ROI Funnel Improvements

6 12-Month Revenue Projections

Scenario Assumptions

Conservative Scenario — Organic Only

Base Scenario — Organic + Community Effort

Optimistic Scenario — Tuner Partnerships + Content

Scenario Comparison at Key Milestones

MRR Growth Visualization

7 Runway & Cash Flow

Current Position

12-Month Cash Flow (Base Scenario)

Cash Flow Milestones (Base Scenario)

8 Unit Economics

Customer Lifetime Value (LTV)

Customer Acquisition Cost (CAC) by Channel

Unit Economics Health Dashboard

LTV by Tier (Base Case: 6% churn)

9 Funding Paths

Path A: Bootstrap

Year 1 Outcome

Best If

Path B: Micro-Raise

Year 1 Outcome

Best If

Path C: Accelerator

Year 1 Outcome

Best If

Alternative: Pre-Sell to Fund Growth

What Each Funding Level Unlocks

10 Growth Levers: Solving the Signup Problem

11 Key Risks & Mitigations

12 90-Day Action Plan

Month 1: Launch & Activate Tuner Network

Month 2: Validate & Iterate

Month 3: Scale What Works

13 Monthly Metrics Dashboard

A Appendix: Key Assumptions & Methodology

Model Limitations