Discounted Cash Flow Calculator
Calculate discounted cash flow with our free Discounted cash flow Calculator. Compare rates, see projections, and make informed financial decisions.
Calculator
Adjust values & calculateProjected Cash Flows
Formula
Where CF_t is the cash flow in year t, r is the discount rate, n is the number of projection years, and Terminal Value = CF_n x (1+g) / (r-g) using the Gordon Growth Model, where g is the perpetual growth rate.
Last reviewed: December 2025
Worked Examples
Example 1: Startup Valuation
Example 2: Real Estate Investment
Background & Theory
The Discounted Cash Flow Calculator applies the following established principles and formulas. Break-even analysis identifies the sales volume at which total revenue equals total costs, producing neither profit nor loss. The formula divides total fixed costs by the contribution margin per unit, where contribution margin equals selling price minus variable cost per unit. If a software product has $50,000 in monthly fixed costs and each licence generates $20 above its variable cost, break-even requires 2,500 unit sales per month. Above that threshold, each additional unit contributes directly to profit. Gross margin expresses the percentage of revenue remaining after direct cost of goods sold: gross margin equals revenue minus COGS, divided by revenue. A SaaS company with 80 percent gross margins retains $0.80 of every revenue dollar to cover operating expenses, while a manufacturer with 30 percent gross margins faces much tighter operating leverage. Customer acquisition cost (CAC) divides total sales and marketing expenditure in a period by the number of new customers acquired in that same period. Customer lifetime value (LTV) estimates the total profit attributable to a customer relationship. The standard formula multiplies average revenue per user (ARPU) by gross margin and divides by the monthly churn rate. A business with $50 ARPU, 75 percent gross margin, and 2 percent monthly churn has an LTV of $1,875. The LTV:CAC ratio benchmarks unit economics health; a ratio above 3:1 is generally considered sustainable, while ratios below 1:1 indicate the business is acquiring customers at a loss. Burn rate measures monthly cash expenditure net of revenue. Cash runway equals current cash reserves divided by net monthly burn. A company with $1.2 million in the bank burning $100,000 per month has twelve months of runway. The Rule of 40 is a benchmark for SaaS health: the sum of annual revenue growth rate (as a percentage) and profit margin (as a percentage) should equal or exceed 40. High-growth companies burning cash can still pass this rule if their growth rate compensates.
History
The history behind the Discounted Cash Flow Calculator traces back through the following developments. Early economic thought centred on mercantilism, the 16th and 17th century doctrine that national wealth derived from accumulating precious metals through export surpluses and colonial extraction. Adam Smith's "Wealth of Nations" in 1776 dismantled this framework, arguing that genuine prosperity arose from specialisation, division of labour, and freely operating markets. David Ricardo extended Smith's work with the theory of comparative advantage in 1817, demonstrating mathematically that mutually beneficial trade was possible even when one country was less productive in every industry. Alfred Marshall's "Principles of Economics" published in 1890 provided the modern framework of supply and demand curves, consumer surplus, price elasticity, and marginal analysis, establishing neoclassical economics as the dominant academic paradigm for decades. The Great Depression exposed the limits of laissez-faire assumptions, and John Maynard Keynes's "General Theory of Employment, Interest and Money" in 1936 argued that private-sector aggregate demand failures required countercyclical government fiscal intervention to restore full employment, shifting the policy consensus toward active macroeconomic management. The post-World War II decades constructed mixed-economy models combining market allocation with expanded welfare states and Keynesian demand management. Milton Friedman and the Chicago School challenged this consensus from the 1960s onward, championing monetarism and arguing that stable money supply growth was superior to discretionary fiscal policy. Their influence shaped the deregulatory and privatisation policies of the Reagan and Thatcher eras in the 1980s. Behavioural economics emerged through the work of Daniel Kahneman and Amos Tversky in the 1970s and Richard Thaler in the 1980s, using psychology to demonstrate that real human decision-making deviates systematically from rational-actor models through heuristics and biases. The rise of the internet and mobile platforms in the 2000s and 2010s created a new category of platform economics, where network effects, near-zero marginal cost of digital goods, and two-sided market dynamics generated winner-take-most competitive outcomes requiring new analytical frameworks for business valuation.
Frequently Asked Questions
Formula
DCF = Sum of [CF_t / (1+r)^t] + Terminal Value / (1+r)^n
Where CF_t is the cash flow in year t, r is the discount rate, n is the number of projection years, and Terminal Value = CF_n x (1+g) / (r-g) using the Gordon Growth Model, where g is the perpetual growth rate.
Worked Examples
Example 1: Startup Valuation
Problem: A startup generates $100,000 in free cash flow, expected to grow at 15% for 5 years. The discount rate is 12% and terminal growth rate is 3%.
Solution: Year 1 CF: $115,000, PV: $102,679\nYear 2 CF: $132,250, PV: $105,421\nYear 3 CF: $152,088, PV: $108,227\nYear 4 CF: $174,901, PV: $111,100\nYear 5 CF: $201,136, PV: $114,041\nPV of Cash Flows: $541,468\nTerminal Value: $201,136 x 1.03 / (0.12 - 0.03) = $2,301,893\nPV of Terminal: $2,301,893 / 1.12^5 = $1,305,838\nTotal DCF: $541,468 + $1,305,838 = $1,847,306
Result: Total DCF Value: $1,847,306 | Terminal Value is 71% of total
Example 2: Real Estate Investment
Problem: A rental property produces $50,000 annual net operating income growing at 3% per year. Discount rate is 8%, projection period is 10 years, terminal growth rate is 2%.
Solution: Cash flows are projected for 10 years with 3% annual growth.\nYear 1: $51,500, PV: $47,685\nYear 5: $57,964, PV: $39,449\nYear 10: $67,196, PV: $31,120\nSum of PV Cash Flows: $373,284\nTerminal Value: $67,196 x 1.02 / (0.08 - 0.02) = $1,142,336\nPV of Terminal: $1,142,336 / 1.08^10 = $529,099\nTotal DCF: $373,284 + $529,099 = $902,383
Result: Total DCF Value: $902,383 | Terminal Value is 59% of total
Frequently Asked Questions
What are common mistakes in discounted cash flow analysis?
Several pitfalls can significantly distort DCF results. First, overly optimistic growth projections are the most common error, leading to inflated valuations. Always use conservative or base-case assumptions. Second, using an inappropriately low discount rate understates risk and inflates present values. Third, setting the terminal growth rate too high has an outsized impact since terminal value dominates the model. Keep it at or below long-term inflation plus real GDP growth. Fourth, ignoring capital expenditures and working capital changes overstates free cash flow. Fifth, failing to perform sensitivity analysis on key assumptions leaves you blind to how uncertain inputs affect the outcome. Sixth, double-counting growth by using high near-term growth AND a high terminal growth rate.
How do you calculate free cash flow for DCF analysis?
Free Cash Flow (FCF) is the cash a business generates after accounting for capital expenditures needed to maintain or expand its asset base. The formula is: FCF = Operating Income x (1 - Tax Rate) + Depreciation and Amortization - Capital Expenditures - Changes in Working Capital. Operating income (EBIT) represents earnings before interest and taxes. You multiply by (1 - tax rate) to get after-tax operating income, also called NOPAT. Depreciation is added back because it is a non-cash expense. Capital expenditures are subtracted because they represent actual cash spent on assets. Working capital changes capture cash tied up in inventory, receivables, and payables. For established companies, FCF margins typically range from 5-20% of revenue depending on the industry.
How do I verify Discounted Cash Flow Calculator's result independently?
The Formula section on this page shows the equation used. You can reproduce the calculation manually or in a spreadsheet using those steps. Compare your answer against the worked examples in the Examples section, which use known reference values so you can confirm the calculator is behaving as expected.
Why might my result differ from another tool or reference?
Differences typically arise from rounding conventions, the specific version of a formula (for example, simple vs compound interest), or unit inconsistencies between inputs. Check that both tools are using the same formula variant and the same units. The References section links to the authoritative source behind the formula used here.
Can I use Discounted Cash Flow Calculator on a mobile device?
Yes. All calculators on NovaCalculator are fully responsive and work on smartphones, tablets, and desktops. The layout adapts automatically to your screen size.
Can I use the results for professional or academic purposes?
You may use the results for reference and educational purposes. For professional reports, academic papers, or critical decisions, we recommend verifying outputs against peer-reviewed sources or consulting a qualified expert in the relevant field.
References
Reviewed by Sahil, Senior Finance & Tax Editor · Editorial policy