--- title: "SaaS Marketing Budget Calculator | ThriveDesk" canonical: "https://www.thrivedesk.com/tools/marketing-budget-calculator/" author: ThriveDesk description: Plan marketing spend across channels and estimate a budget that fits your growth stage. categories: [tool] --- # Plan your SaaS marketing budget with confidence. Feed in your business model, paid budget, CAC assumptions, organic traffic, and brand spend — and get a 3-year projection: customers, MRR, LTV:CAC, break-even, and how close you come to running out of cash. Everything stays in your browser. **Business Model** ARPU, billing, churn **Paid Traffic (PPC)** Budget and CAC **Organic Traffic** SEO and content General ## Basic information about your company and budget Company name Currency Initial capital Cash available before revenue — sets your runway. Expected launch date Month zero of the projection. Business model ## Information about your business model ARPU (average revenue per user) Average account revenue per month. With multiple plans, use an average of the plan prices. Billing cycle How you primarily bill customers — yearly collects 12× ARPU upfront, improving early cash. Expected churn rate (%) Most B2C companies try to stay near 5% monthly churn; most B2B companies aim for 0–2%. Customer Lifetime Value (LTV) **$980** ARPU ÷ monthly churn, updated as you type. Budget ## Your monthly marketing budget Starting budget Initial monthly marketing budget. Monthly budget increase How much the budget grows each month. Maximum budget The most you could spend on paid traffic in a month. CAC ## Your cost of acquisition Expected CAC, first month Initial cost to acquire one customer. Monthly CAC change (%) Positive if you assume CAC rises, negative if it falls. Most SaaS see it increase as they scale. Minimum CAC possible The floor your CAC can't drop below. Website traffic ## Your organic traffic assumptions Organic traffic efforts kick-off When you expect your first organic traffic. Website traffic at launch Monthly visitors you expect when efforts kick off. Monthly traffic increase (%) How much organic traffic compounds each month. Maximum possible organic traffic A ceiling for monthly visitors — every niche has one. Organic traffic conversion to paid (%) A good conversion rate is typically between 2% and 5%, but it varies significantly across industries. Brand awareness budget ## Unless you have a strong brand, you may not need this We do not calculate CAC with your brand awareness budget — it only increases your overall expenditure. Starting budget Initial monthly brand budget. Monthly budget increase How much it grows each month. Maximum budget The most you'd spend in a month. Results ## Your 3-year projection Runway Customer Lifetime Value **—** ARPU ÷ monthly churn Blended CAC **—** Total paid spend ÷ paid customers won LTV : CAC ratio **—** 3:1 is the healthy benchmark Profitable from **—** First month MRR covers marketing spend Spend paid back **—** Cumulative revenue catches cumulative spend After 36 months **—** Customers · MRR Trend ### MRR vs. spend vs. cash MRR Marketing spend Cash balance ### Detail Month-by-month breakdown Click to expand the full 36-month table. | Month | New paid | New organic | Customers | MRR | Spend | Net cash flow | Cash balance | | --- | --- | --- | --- | --- | --- | --- | --- | A model, not a promise The projection applies your assumptions mechanically: paid budget ramps to its cap, CAC drifts toward its floor, organic traffic compounds to its ceiling, churn applies monthly, and brand spend only adds expenditure. Re-run it with pessimistic numbers before betting the company on the optimistic ones. The metrics ## The numbers behind the projection Six metrics drive every SaaS marketing budget decision. Here is what each one means and how the calculator computes it. ### Lifetime Value (LTV) ARPU ÷ monthly churn rate The total revenue you can expect from a single customer over the course of the relationship. At $49 ARPU and 5% churn, each customer is worth $980. ### Customer Acquisition Cost (CAC) acquisition spend ÷ new customers Everything you spend on marketing, sales, and advertising to win one customer. The calculator reports a blended CAC across your whole paid budget. ### LTV : CAC ratio LTV ÷ CAC The health check for your model. 3:1 is the classic target — below 1:1 you lose money on every customer; far above 5:1 you may be underinvesting in growth. ### Conversion rate conversions ÷ visitors × 100 The share of website visitors who become paying customers. A good rate typically sits between 2% and 5%, but it varies significantly across industries. ### Churn rate customers lost ÷ customers × 100 The percentage of customers who leave each month. Most B2B companies aim for 0–2% monthly churn; B2C companies try to stay near 5%. ### Monthly Recurring Revenue (MRR) active customers × ARPU The recurring revenue your customer base generates each month — the line the projection chart tracks against your marketing spend. ### How the projection works Each month for 36 months: your paid budget grows by its monthly increase until it hits the cap, CAC moves by its monthly change until it hits the floor, and budget ÷ CAC becomes new paid customers. Organic traffic compounds from kick-off toward its ceiling, converting at your rate. Churn removes a share of the customer base, MRR is customers × ARPU, and cash tracks billing — yearly billing collects twelve months upfront at signup and renewal, monthly billing collects as it goes. ### How to read the results - LTV:CAC near 3:1 means the model works; below 1:1, fix the funnel before scaling spend. - The lowest cash point is the capital you actually need — not your starting budget. - Two break-evens matter: when months turn profitable, and when the early burn is paid back. - Churn moves the chart more than any other input — test 1% steps before testing budget changes. Benchmarks ## How much should a SaaS spend on marketing? There is no universal percentage — the right budget depends on stage, payback, and how much cash you can put at risk while the flywheel spins up. 01 **Pre-launch & pre-product-market fit** Spend on learning, not scale: small paid experiments to test messaging, founder-led content, and conversations with early users. Big budgets before the funnel converts just buy expensive lessons. 02 **Early growth** Once a channel converts predictably, ramp it the way this calculator models: steady monthly increases toward a cap, watching that blended CAC stays well under LTV and payback stays inside a year. 03 **Scaling** Growth-stage SaaS commonly puts 30–50% of revenue into sales and marketing. The discipline that keeps it sane: CAC payback under 12 months and an LTV:CAC ratio that holds near 3:1 as you spend more. ### Rules of thumb that survive contact with reality Keep CAC payback under 12 months — under 6 if you bill monthly and capital is tight. Hold LTV:CAC near 3:1 while ramping. Treat channel caps seriously: every channel saturates, which is why the calculator caps paid budget and organic traffic. And fund brand awareness from profit, not from runway — it compounds slowly and can't be attributed cleanly. ### When to increase the budget Scale spend when three things hold at once: payback is comfortably inside your cash cycle, the ratio holds as spend grows (CAC isn't spiking), and the lowest-cash month in the projection still leaves margin for error. If CAC rises as you ramp, fix conversion before buying more traffic — a cheaper funnel beats a bigger budget. FAQ ## Common questions around the marketing budget calculator How the projection is built, what it assumes, and what happens to your data. ### How accurate is this 3-year projection? It is an estimate, and it is exactly as good as your assumptions. The model applies your inputs consistently — budget ramps, CAC drift, organic compounding, monthly churn — but real life is lumpier: channels saturate, conversion rates move, and one pricing change can redraw the chart. Run a pessimistic scenario (higher CAC, higher churn, slower organic) next to your base case and plan against the gap. ### Can I download the results? Yes — the Download PDF button opens your browser’s print dialog with a clean, results-only layout, so you can save the projection as a PDF or print it for a planning meeting. ### Is my data stored anywhere? No. The calculator has no backend — every number you enter and every projection it produces lives only in your browser tab. Reload the page and it’s gone. ### What is a good LTV to CAC ratio? 3:1 is the widely used benchmark — each customer returns three times what they cost to acquire, leaving room for the rest of the business. Below 1:1 you are paying customers to leave with your money. Far above 5:1 usually means you could grow faster by spending more, not that you should celebrate. ### Why doesn’t the brand awareness budget affect CAC? Because you can’t cleanly attribute a brand campaign to an individual signup, the calculator treats brand spend as pure expenditure: it reduces your cash balance and pushes break-even out, but it doesn’t enter the CAC math. That mirrors how most SaaS finance teams treat it — and it’s why the brand tab warns you about exactly this. ### What if the projection shows me running out of cash? The red runway warning means cumulative spend outpaces revenue plus your initial capital at some point. Your levers, roughly in order: slow the budget ramp or lower the cap, cut brand spend, improve the funnel so CAC falls faster, reduce churn (it compounds more than anything), or raise more capital before the dip — never during it.