The Startup Finance Terms Founders Actually Need

Annualized value of your subscription revenue at a point in time.

ARR is the normalized annual value of your active recurring contracts as of a measurement date. It excludes one-time fees, usage overages (unless contractually guaranteed), and services revenue. ARR is the north-star top-line metric most SaaS investors use.

Monthly equivalent of ARR, useful for month-over-month tracking.

MRR is ARR divided by 12, reflecting the monthly recurring revenue from active subscriptions. Track it as a waterfall: starting MRR + new + expansion − contraction − churn = ending MRR.

Revenue from your existing customer base 12 months later, including expansion and churn.

NRR = (Starting ARR + Expansion − Contraction − Churn) / Starting ARR, measured on a fixed cohort over 12 months. Best-in-class SaaS companies see NRR above 120%. Below 100% means the base is shrinking.

NRR without upsell — what you keep before expansion.

GRR = (Starting ARR − Contraction − Churn) / Starting ARR. Capped at 100%. A better view of pure retention quality than NRR since expansion can mask churn.

Fully-loaded cost to acquire one new customer.

CAC = (Sales + Marketing spend) / New customers acquired. Fully-loaded CAC includes salaries, benefits, tools, and allocated overhead — not just ad spend. Investors evaluate CAC alongside payback period and LTV.

Total gross profit a customer generates over their lifetime.

LTV = ARPU × Gross Margin / Churn Rate. The right LTV uses gross margin (not revenue) and a churn rate measured on the same cohort. LTV/CAC above 3x is a rule-of-thumb minimum for a healthy SaaS business.

Number of months to recover CAC from gross profit.

CAC Payback = CAC / (MRR × Gross Margin). Measured in months. Best-in-class SaaS is under 12 months; under 18 is healthy; over 24 is a red flag.

ARR growth rate + operating margin should sum to 40%+.

The Rule of 40 is a shorthand SaaS health check: a company growing 30% with a 10% operating margin (30 + 10 = 40) is 'at rule'. It captures the tradeoff between growth and profitability and is widely used by investors and boards.

Net cash consumed per month.

Gross burn is total cash out; net burn is cash out minus cash in. When founders say 'burn' they usually mean net burn. Track it monthly and against forecast. A spike in net burn without a matching revenue increase is a warning sign.

Months of cash remaining at current net burn.

Runway = Cash on hand / Average net monthly burn. Investors generally want to see 18–24 months of runway at fundraise close. Less than 6 months and you're in raise-or-die territory.

Sales efficiency metric — new ARR per dollar of S&M spend.

Magic Number = (Quarterly ARR growth × 4) / Prior-quarter S&M spend. Above 1.0 is strong, above 0.75 is healthy, below 0.5 means your GTM isn't returning efficient growth.

Net burn divided by net new ARR — a capital efficiency metric.

Burn Multiple = Net Burn / Net New ARR. Popularized by David Sacks. Under 1x is outstanding; 1–2x is healthy; over 3x is poor capital efficiency.

GAAP revenue recognition standard for contracts with customers.

ASC 606 is the US GAAP standard for recognizing revenue from contracts with customers. It requires a 5-step model: identify the contract, identify performance obligations, determine transaction price, allocate price, and recognize revenue as obligations are satisfied. Matters for SaaS (deferred revenue), usage-based pricing, and multi-element arrangements.

GAAP rules for expensing stock-based compensation.

ASC 718 governs how companies recognize compensation expense for equity awards (options, RSUs). Expense equals grant-date fair value spread over the service (vesting) period, with adjustments for forfeitures. Drives a significant non-cash expense on most startup P&Ls.

GAAP standard requiring leases to be recognized on the balance sheet.

ASC 842 requires lessees to recognize a right-of-use asset and a lease liability on the balance sheet for most leases. Matters for startups with office space or equipment leases — surprises many founders their first audit.

Cash received in advance of delivering the service.

Deferred revenue (a liability) represents cash collected for services not yet delivered — like an annual SaaS subscription paid upfront. Revenue is recognized over time as the service is provided, under ASC 606.

Accrual recognizes revenue/expense when earned; cash when money moves.

Accrual accounting recognizes revenue when earned and expenses when incurred — regardless of cash timing. Cash accounting records them when cash moves. GAAP requires accrual. Investors, auditors, and lenders expect accrual-basis financials.

Generally Accepted Accounting Principles — the US accounting standard.

GAAP is the common set of rules governing US financial reporting, set by the FASB. Most investors and all auditors expect GAAP-compliant financials. Non-GAAP adjustments (like backing out SBC) are common in investor reporting but must be clearly labeled.

The process of finalizing a month's books for reporting.

Monthly close involves reconciling accounts, posting accruals, and producing GAAP-compliant financial statements for the month. A well-run close finishes within 10 business days of month-end; slower close times signal process or staffing issues.

The structured list of categories all transactions are booked to.

A chart of accounts (COA) is the master list of all accounts in your general ledger, organized by type (asset, liability, equity, revenue, expense). A startup-appropriate COA is granular enough for analysis but simple enough to maintain.

Convertible instrument commonly used for early-stage rounds.

A SAFE is a contract giving an investor the right to future equity in exchange for cash now — no interest, no maturity date. Created by Y Combinator. Common variants: post-money SAFE (simpler cap table math) and pre-money SAFE. Converts to preferred stock at the next priced round.

Debt that converts to equity at the next priced round.

A convertible note is short-term debt that converts to equity at a discount or cap at the next priced round. Less common than SAFEs at pre-seed and seed, but still used — especially for bridge financings between rounds.

Independent valuation of common stock used to set option strike prices.

A 409A valuation is a third-party appraisal of your common stock's fair market value, required by IRS Section 409A. It sets the strike price for stock options. Must be refreshed after priced rounds and annually to maintain safe-harbor protection.

A record of all ownership interests in your company.

A capitalization table tracks every share, option, warrant, and convertible instrument — by holder, class, and vesting status. Most startups run their cap table on platforms like Carta, Pulley, or AngelList. Accuracy matters intensely at diligence.

An investor's right to maintain their ownership % in future rounds.

A pro rata right lets an existing investor invest in future rounds at their current ownership percentage, avoiding dilution. Standard in VC term sheets. Founders should track who has pro rata rights and how much future capital is implicitly reserved.

The multiple of their investment preferred holders receive before common in an exit.

Liquidation preference is the amount investors get back before common shareholders in a sale or liquidation. Standard is 1x non-participating. 'Participating' preferences or multiples above 1x are more investor-friendly and compress common returns.

Federal credit for qualified research expenses, usable against payroll tax by startups.

Qualifying startups can claim up to $500,000/year of R&D tax credits against payroll tax (post-IRA). Qualifying spend includes US engineering wages, contractor research (65% of cost), and cloud compute used in development. Filed on Form 6765 with your return.

Annual tax for Delaware corporations, often quoted wildly too high if calculated incorrectly.

Delaware franchise tax applies to all Delaware-incorporated C-Corps. The default 'authorized shares' method can produce enormous bills for startups. Most startups should use the 'assumed par value capital' method, which is typically 10–100x cheaper. Due March 1 annually.

The connection with a state that triggers a tax-collection obligation.

Post-Wayfair (2018), states can require remote sellers to collect sales tax once 'economic nexus' thresholds are met — typically $100K–$500K of sales or 200+ transactions per year. Most SaaS and e-commerce startups have nexus in many states within a year of material growth.

Tax exemption for gains on qualifying startup stock held 5+ years.

Under IRC Section 1202, gains on QSBS held 5+ years can be excluded from federal tax (up to $10M or 10x basis). Founders and early employees should confirm QSBS eligibility at the time of grant — it's one of the most valuable tax breaks available to startup employees.

Tax election for restricted stock holders to be taxed on grant-date value instead of vesting value.

A Section 83(b) election lets you pay ordinary income tax on the value of restricted stock at grant instead of at vesting — nearly always beneficial if current value is low and expected to rise. Must be filed with the IRS within 30 days of grant.

A direct-method weekly forecast of cash inflows and outflows.

The 13-week cash forecast is a CFO-standard short-term liquidity tool. It lists weekly expected receipts, payments, and ending cash for a rolling 13-week window. Catches cash-timing issues (big AR receipt slipping a week, payroll plus rent hitting the same week) that a P&L forecast misses.

The monthly or quarterly report delivered to your board of directors.

A board pack typically includes CEO commentary, KPI dashboard, P&L and cash trends vs. plan, runway forecast, departmental updates, and cap-table detail. Delivered 48–72 hours before the board meeting. A tight board pack builds board trust; a messy one burns it.

A secure repository of documents investors review in diligence.

A data room holds the financial, legal, and operating documents investors or acquirers review during diligence — financials, cap table, customer contracts, HR files, IP documentation. Organized, complete data rooms close rounds faster.

The revenue and cost per unit of output (customer, transaction, seat).

Unit economics measure the profitability of a single 'unit' — a customer, a transaction, a seat — after direct costs. Every investor asks for unit economics: CAC vs. LTV in SaaS, contribution margin per transaction in fintech, per-SKU margin in e-commerce.

CFO-set thresholds for safe monthly spend across categories.

Spend guardrails are monthly or quarterly limits on categories (payroll growth, S&M, infrastructure) that, if exceeded, trigger a CFO conversation. They let a founder move quickly on spend decisions while keeping runway and unit economics in control.

Measuring behavior of users grouped by time of acquisition.

Cohort analysis tracks a group of customers acquired in the same period over time — retention, revenue per user, payback. Reveals whether new cohorts are performing better, worse, or flat vs. older cohorts. Foundational for SaaS and subscription businesses.