SaaS Metrics Accounting
SaaS Metrics Accounting That Reconcile to Your Books.
Accrual-basis bookkeeping in QuickBooks Online or Xero. ASC 606 from day one. Monthly close in 10 business days. The starting point for SaaS companies that intend to raise institutional capital.
Bookkeeping starts at $1,200/month for pre-seed and seed· $3,500/month for Series A to Series B · Full pricing on our pricing page
You Dashboard Says One Thing. Your Books Say Another.
Your ChartMogul says $4.2M ARR. Your QBO says $3.1M revenue, accrual basis. Both are technically right. Neither survives due diligence.
Here’s what’s usually broken. Annual contracts billed upfront, with no deferred revenue schedule. Discounts and credits hitting MRR but never reconciling to the GL. Multi-year deals with year two and three sitting in the wrong period. Customer churn recorded in your CRM but not in the books.
If your last accountant didn’t track contracts at the line level, your metrics are estimates. Estimates don’t pass diligence.
What We Do
What we Actually Do.
We rebuild your metrics from the contract up. Every customer contract gets a deferred revenue schedule. Every billing event ties to a hash, an invoice, or a Stripe charge ID. Every metric reconciles to the GL.
- Contracts
ARR and MRR
Calculated from billing data, not estimated from snapshot dashboards. Annual contracts annualized correctly. Usage overages excluded unless contractually committed.
- Revenue
Net Revenue Retention & Gross Revenue Retention
Cohort-based, not snapshot-based. Expansion, contraction, and churn tracked separately. Calculated the way Tier 1 VCs actually verify them.
- Revenue
CAC and CAC Payback
A reconciliation that shows the difference between annualized run-rate and GAAP revenue. Without this, your investor metrics don’t tie to your financials.
- Lifetime Value
LTV and LTV-to-CAC
Lifetime value calculated using actual gross margin and observed churn, not aspirational assumptions. LTV-to-CAC ratios that hold up in board meetings.
- Burn Rate
Burn Rate, Runway, and Cash Forecast
Net burn calculated against operating expenses, not revenue. 13-week cash forecast. Runway projections that match what your CFO would build, if you had one.
Our Specialized Approach to SaaS Metrics Accounting
What You Actually, Get Every Month
When you sign on, the deliverables are specific and the timing is fixed.
Monthly metrics package, delivered with your financials:
- ARR snapshot with month-over-month bridge (new business, expansion, contraction, churn)
- MRR breakdown by customer segment
- NRR and GRR by cohort
- CAC and CAC payback period, by acquisition channel where data allows
- LTV by cohort, with documented assumptions
- Net burn, runway, and 13-week cash forecast
- One-page executive summary suitable for investor updates
Quarterly:
- Cohort retention deep dive
- Unit economics review
- Pricing and gross margin analysis
- Custom slides for board deck preparation
On-demand for active engagements:
- Diligence response support
- Investor question follow-ups
- Ad-hoc cohort analysis
Format:
- Delivered as a PDF report and an interactive Google Sheet. Source data available in your shared drive.
Who Needs This?
You need this if any of these apply:
- You're planning to raise in the next 6 to 12 months
- Your investor metrics live in a dashboard, not your books
- You use ChartMogul or Stripe analytics as your source of truth
- You can't produce a deferred revenue waterfall
- Your ARR and revenue numbers don't reconcile
- You've been told your books "look fine for now"
How We're Different.
We handle the operating accounting between funding rounds. The work that has to be done every month, whether or not you’re raising.
Fortress Accounting tracks the metrics that truly matter for your business:
Metrics built from billing data, not dashboards.
Dashboards are operational tools. Books are the record. We build metrics from the underlying contracts and reconcile them to both.
Built for diligence, not just the board deck.
Our outputs survive a Tier 1 VC's diligence process and a Big Four auditor's revenue recognition review. Both at once.
Cohort-level analysis as standard.
Most firms produce snapshot metrics. We produce cohort metrics, which is what VCs actually evaluate.
Same team handles books and metrics.
Most SaaS companies split accounting and analytics across two firms. The numbers don't match because they're built from different sources.
Our Team Members
Who You'll, Work With.
Metrics work is led by a senior accountant or analyst with SaaS-specific experience. For companies with crypto-native or AI-native business models, the lead is matched to the vertical.
We’ll introduce you to your specific team during the audit call.
Reinoud Dykema
Interim CFO
Kristen Delgreco
Interim Controller
Marlene van Geer
Interim Accountant
Three Steps
The Three-Step for Engagement.
Audit Call
We look at your billing system, your books, and your current metrics. You’ll know within the call whether they reconcile.
Flat-free Quote
Based on contract count, billing complexity, and historical cleanup needed.
Rebuild and maintain.
Most rebuilds take 3 to 6 weeks. Monthly metrics package delivered 10 business days after close.
Common Questions
Common Questions, Before You Switch Firms.
Can't I just use ChartMogul or Baremetrics for this?
Those are good tools for operational dashboards. They are not the right source for investor metrics because they don’t see the GL. Your investor metrics need to reconcile to your audited financials. The rule we teach clients: dashboards for operations, books for what gets reported. They should agree, but the books are the record.
How is this different from what my CFO consultant does?
Most fractional CFOs build metrics on top of whatever data they’re given. If the underlying books are wrong, the metrics are wrong. We rebuild from the contract level, then reconcile to the books, then the metrics are right. CFO interpretation comes after that. Many of our metrics clients also engage us for fractional CFO support — same team, two services.
My VCs use a specific format for ARR bridges. Can you match it?
Yes. We’ve prepared diligence packages for most Tier 1 VCs and their preferred formats. Tell us the fund or paste their template into the audit call. We adapt to what your investors expect.
What if my billing system can't produce contract-level data?
We work with what’s available. For most SaaS companies on Stripe, Chargebee, Recurly, or Zuora, contract-level data is accessible with the right queries. For companies on simpler systems or invoicing manually, we sometimes have to rebuild contract data from order forms and signed agreements. We tell you on the audit call which path applies.
How fast can you get me investor-ready if I have a term sheet conversation next month?
Three weeks is achievable for SaaS companies with reasonably clean books. Six weeks is more realistic if cleanup is needed. We’ll be honest on the call about whether your timeline is feasible.
Most Common Questions
Frequently Asked Questions
Why don't my MRR and revenue numbers match?
MRR is a forward-looking subscription metric. Revenue is what you’ve earned this period under ASC 606. They will never be identical. They should be reconcilable through a bridge that accounts for deferred revenue, discounts, churn, and contract start dates. If yours isn’t, your books aren’t tracking contracts at the line level.
How is SaaS ARR calculated correctly?
ARR equals the annualized run-rate of recurring subscription revenue at a point in time. It excludes one-time fees, professional services, and usage overages unless contractually committed. Most ARR errors come from including non-recurring revenue, double-counting upgrades, or failing to remove churned customers in the period they churned.
What's the difference between gross retention and net retention?
Gross retention measures how much revenue you keep from existing customers, excluding upsells. It can never exceed 100%. Net retention includes expansion and can exceed 100%. VCs look at both because GRR shows churn risk and NRR shows expansion strength. If you’re only reporting one, you’re hiding the other.
How is CAC calculated for SaaS companies?
Customer acquisition cost equals total sales and marketing spend in a period, divided by new customers acquired in that period. Spend should include fully loaded sales and marketing headcount, not just program spend. Most CAC errors come from excluding salaries or counting expansion bookings as new acquisitions.
How is LTV calculated for SaaS companies?
Lifetime value equals average revenue per customer, multiplied by gross margin, divided by churn rate. The gross margin step is where most calculations break. Using revenue instead of margin overstates LTV by 60 to 80 percent for typical SaaS businesses.
What is LTV-to-CAC and what's a good ratio?
LTV-to-CAC measures the lifetime value of a customer relative to the cost to acquire them. A ratio of 3-to-1 or better is generally considered healthy for B2B SaaS. Below 1-to-1 means you’re losing money on each customer. The ratio matters less than the inputs being calculated correctly.
Can I use ChartMogul or Baremetrics as my source of truth?
Not for investor reporting. Those tools pull from billing data and don’t see the GL. Your investor metrics need to reconcile to your audited financials. Use them for operational dashboards and your books for what gets reported. They should agree, but the books are the record.
How long does it take to rebuild SaaS metrics correctly?
Most rebuilds take 3 to 6 weeks, depending on contract count, billing system complexity, and how far back the issues go. We quote a fixed timeline after the audit call.
Do you handle usage-based or hybrid billing models?
Yes. Usage-based revenue recognizes when consumed under ASC 606. Hybrid models with subscription plus usage components require separate revenue schedules per performance obligation. We handle both.
What does it cost to rebuild SaaS metrics?
Metrics rebuild is quoted as a flat fee based on contract count and complexity. Ongoing monthly metrics tracking is included in our Series A through Series B bookkeeping at $3,500/month. Standalone metrics-only engagements are quoted on the audit call. Full pricing on our pricing page.
Still have questions? Contact us.
Fix Your Metrics Before Your Investors Check.
Term sheet timelines move faster than founders expect. The financial section of diligence is where most deals get repriced. Get it right before someone else checks it.
Built for B2B, crypto-native, and AI-native SaaS · 3 to 6 week rebuild · Same team handles books and metrics · VC-fluent diligence packages