Flotation Cost Percentage Calculator
Issuing new securities costs money before the firm sees a cent: underwriting spreads, legal and accounting fees, registration and printing. This calculator measures that burden two ways, as the flotation cost percentage of the total capital raised and as the cost of new common equity with flotation worked into the Gordon growth formula, and it shows the wedge between new equity and retained earnings so the price of issuing is a number, not a guess.
Flotation Cost Percentage Calculator
Issuance cost as a percentage of the raise, plus the cost of new equity with flotation built in
Educational tool. The equity mode uses the constant-growth (Gordon) model; it does not fit firms with irregular dividends.
Quick Answer
Raise $1,000,000 and pay $70,000 in issuance costs and the flotation cost percentage is 7.00%, leaving net proceeds of $930,000. Priced as equity with a $2.00 expected dividend, a $40.00 share price, 7% flotation and 5% growth, new shares cost 10.38% against 10.00% for retained earnings: a flotation wedge of 0.38 percentage points.
Key takeaways
- The percentage always divides by the gross amount raised. Dividing by net proceeds overstates it.
- Flotation raises the cost of new equity because the firm nets P0(1 – f) per share, not P0.
- To hit a net target, gross up by dividing by (1 – f), never by multiplying by (1 + f).
- This page prices issuing securities. It is not a fixed cost percentage: that separate measure splits a running business’s existing costs into their fixed share of total cost, with no shares issued and no capital raised.
- Quick Answer
- How to use the flotation cost percentage calculator
- The two formulas, and what each one assumes
- Worked examples: the same issue priced both ways
- What counts as a flotation cost, and what it typically runs
- Sizing the issue: gross up by dividing, never by multiplying
- Two ways to put flotation into a project decision
- What competing calculators miss
- Frequently asked questions
- Add This Calculator to Your Website
- References
How to use the flotation cost percentage calculator
Pick the mode that matches the numbers you actually have, then enter them as printed on the term sheet or prospectus. If you know the dollar costs of an issue and the gross amount raised, use the percentage mode. If you know next year’s dividend, the share price, a flotation percentage and a growth rate, use the equity mode.
- Percentage mode: add every issuance cost into one total, enter it beside the gross capital raised, and read the percentage and the net proceeds.
- Equity mode: enter D1, P0, f and g. The result line gives the cost of new equity first, then net proceeds per share, the retained-earnings cost, and the wedge in percentage points and basis points.
- Chaining the modes: if an equity problem gives you dollar costs instead of f, run the percentage mode first and carry its percentage into the equity mode as f.
One naming trap is worth clearing up at the start. A fixed cost percentage calculator answers an operating question, what share of a firm’s total costs are fixed, while this page answers a financing question, what share of a new securities issue is consumed by the costs of issuing it. The two percentages share words and nothing else.
The two formulas, and what each one assumes
Two short formulas do all the work here. The percentage is total flotation costs divided by total capital raised, times 100. The equity formula is the Gordon growth model with the share price replaced by net proceeds per share: r_e = D1 / (P0(1 – f)) + g.
| Mode | Formula | Inputs | What it answers |
|---|---|---|---|
| Flotation cost percentage | Costs / capital raised x 100 | Total issuance costs, gross amount raised | How much of the raise the issue itself consumes, and the net proceeds left |
| Cost of new equity | D1 / (P0(1 – f)) + g | D1, P0, f, g | The required return on newly issued shares, and how far it sits above retained earnings |
The percentage formula assumes the denominator is the gross raise, the amount investors actually pay. That is the convention in the prospectus world the SEC’s going-public guidance describes, where gross proceeds, underwriting discounts and net proceeds are reported as separate lines. The equity formula carries the Gordon model’s assumptions with it: dividends grow at one constant rate forever, and the growth rate stays below the required return. A firm paying no dividend has no D1 to enter, and no result from this mode means anything for it.
The same Gordon structure prices a share from its expected dividends, which is why a small change in the denominator matters so much: shaving 7% off the price per share lifts the dividend yield term from 5.00% to 5.38%, and that lift is the entire wedge.
Worked examples: the same issue priced both ways
Both worked examples below reproduce exactly in the calculator, which is pre-filled with the first one. Change any input and the results box hides until you calculate again.
$70,000 costs on $1,000,000 raised gives 7.00%.
$1,000,000 – $70,000 = $930,000 reaches the firm.
D1 $2.00, P0 $40.00, f 7%, g 5%: net proceeds per share are $37.20.
2.00 / 37.20 + 5% = 10.38%, against 10.00% retained, a wedge of 0.38 points (38 basis points).
A second check, the textbook case used in corporate finance courses: D1 of $1.00, a $10.00 share price, 7% flotation and 10% growth. The calculator returns a cost of new equity of 20.75% and a retained-earnings cost of 20.00%, a wedge of 0.75 points. Some textbooks print 20.7% for the first figure; that is the same answer rounded to one decimal place, not a different formula.
What counts as a flotation cost, and what it typically runs
Anything the issue consumes before the firm can spend the money counts: the underwriter’s spread, legal and accounting fees, registration and filing fees, printing, and roadshow costs. The spread is normally the largest single piece.
| Issue type | Typical all-in flotation | Why it lands there |
|---|---|---|
| Seasoned debt | About 2 to 4% | Simpler documents, an existing borrower record, less marketing |
| Seasoned equity | About 4 to 8% | Underwriting spread on shares plus full legal and accounting work |
| IPOs | 7% and up | First-time registration, roadshow, and a spread that clusters near 7% in the long-running IPO data maintained by Jay Ritter’s IPO database at the University of Florida |
These are rough reported ranges for orientation, not quotes. Size pushes the percentage down: a $200 million raise spreads the same legal bill over far more dollars than a $5 million raise, which is why small issues routinely show the highest flotation percentages and why the percentage, not the dollar total, is the fair way to compare two issues.
Sizing the issue: gross up by dividing, never by multiplying
When a project needs a set net amount, divide that amount by (1 – f) to find the gross raise. Needing $145,000 net at 8% flotation means raising $145,000 / 0.92 = $157,608.70.
The tempting shortcut, multiplying $145,000 by 1.08 to get $156,600, undershoots by $1,008.70, because the 8% is charged on the gross amount raised, not on the net amount needed. An issue sized the wrong way leaves the project short before it starts. The calculator has no separate gross-up mode; this one division is the whole calculation, and the percentage mode confirms the split afterwards: $157,608.70 raised at 8% leaves $145,000.00 net, within rounding.
Two ways to put flotation into a project decision
Analysts disagree about where flotation belongs, and the honest answer is that both treatments are in professional use. Method one, used by this calculator’s equity mode, folds flotation into the discount rate: the equity slice of the WACC costs more, so every future cash flow is discounted harder. A dedicated cost of new equity calculator works the same side of the street, starting from an issue price or known net proceeds.
Method two keeps the discount rate clean and deducts the flotation dollars once, as an upfront outflow in the NPV. Many practitioners prefer it on principle: flotation is paid a single time at issuance, while a higher discount rate charges the project for it every year forever. Textbook courses and most exams expect method one. A CFO presenting to a board that has already adopted method two will get a different project ranking from the same inputs, so name your method before you defend your number.
Debt sits in the same framework with smaller numbers. Issuance costs on a bond run well below equity flotation, and a cost of redeemable debt calculator shows the redemption side of that comparison. The pecking order follows from the whole pattern: internal funds carry no flotation at all, debt carries a little, and new equity carries the most, which is one reason managers treat a share issue as the last resort rather than the first.
What competing calculators miss
Flotation tools and explainers split into camps, and each stops one step short:
- Percentage-only tools (CalculatorsHub’s flotation cost percentage page): one ratio and no equity mode at all. Worse, its worked example divides $350,000 by the $4,650,000 net proceeds and reports 7.53%; the standard denominator is the $5,000,000 gross raise, which gives 7.00%. That single choice inflates every result the page produces.
- Encyclopedia explainers (SuperMoney, LegalClarity, DominionFX): the formulas are right and the 20.7% textbook example is there, but there is no working tool, no net proceeds line, and no way to test your own dividend, price and growth inputs.
- Exam-prep notes (CFA curriculum summaries): rigorous on the cash-flow alternative and on when flotation is small enough to ignore for debt, but written for candidates, with no calculator and no gross-up check.
- Single-mode equity tools: several return r_e and stop. Without the retained-earnings baseline beside it, the reader never sees the wedge, which is the number that explains what issuing actually costs.
- The gap this page fills: both modes in one place, the wedge stated in percentage points and basis points, the gross denominator used throughout, and a gross-up section that catches the multiply-instead-of-divide error before it sizes an issue short.
Frequently asked questions
Flotation cost is the cost of issuing new securities: underwriting spreads, legal and accounting fees, registration and filing fees, and printing and roadshow costs. It reduces the net proceeds the firm actually receives from the issue.
Divide the total flotation costs by the total capital raised, then multiply by 100. The denominator is the gross amount raised, not the net proceeds: $70,000 of costs on $1,000,000 raised is 7.00%, with net proceeds of $930,000.
r_e = D1 / (P0 x (1 – f)) + g: next year’s expected dividend divided by the net proceeds per share, plus the dividend growth rate. With D1 of $2.00, a $40.00 share price, 7% flotation and 5% growth, the cost of new equity is 10.38%.
Retained earnings carry no issuance costs, so the firm keeps the full market price per share. New shares net only P0(1 – f) after flotation, which shrinks the denominator and raises the required return. The gap between the two rates is the flotation wedge: 0.38 percentage points in the worked example.
Roughly 2 to 4% for seasoned debt issues, 4 to 8% for seasoned equity, and 7% or more for IPOs. Small issues run higher in percentage terms because legal, accounting and filing fees do not shrink in proportion to the amount raised.
Either treatment is defensible. Folding flotation into the cost of equity, as this calculator’s equity mode does, is the textbook standard. Deducting flotation as an upfront cash outflow in the project NPV is preferred by many practitioners because flotation is paid once, not every year.
Divide the net amount you need by (1 – f). For $145,000 net at 8% flotation, raise $145,000 / 0.92 = $157,608.70. Multiplying $145,000 by 1.08 gives $156,600, which undershoots because the percentage applies to the gross amount, not the net.
Yes, but usually by less: debt issuance costs are smaller in percentage terms, and their tax treatment differs from equity issuance costs, which are generally not deductible. This calculator’s equity mode is built for common stock; its percentage mode works for any security where you know the total issuance cost and the gross amount raised.
The pecking order says firms prefer internal financing first, then debt, and new equity last. Information costs and flotation make external equity the most expensive source, so managers reach for it only after retained earnings and borrowing.
No. The Gordon growth model assumes dividends grow at one constant rate forever. Firms with irregular, zero or declining dividends, or with no dividend at all, need a different approach, and the equity mode’s result should not be used for them.
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References
- U.S. Securities and Exchange Commission. Going Public. Accessed October 21, 2026.
- U.S. Securities and Exchange Commission. Capital Raising. Accessed October 21, 2026.
- U.S. Securities and Exchange Commission. Form S-1: Registration Statement Under the Securities Act of 1933 (PDF). Accessed October 21, 2026.
- Financial Industry Regulatory Authority (FINRA). Stock Up on Information Before Buying Stock (including the IPO process). Accessed October 21, 2026.
- Ritter, J. R., University of Florida Warrington College of Business. IPO Data. Accessed October 21, 2026.
- Myers, S. C. and Majluf, N. S. Corporate Financing and Investment Decisions When Firms Have Information That Investors Do Not Have (NBER Working Paper 1396). Accessed October 21, 2026.
- Nasdaq. The IPO Process. Accessed October 21, 2026.
- OpenStax, Rice University. Principles of Finance: Alternative Sources of Funds (flotation costs). Accessed October 21, 2026.
- AnalystNotes. CFA Level I Study Notes: Flotation Costs. Accessed October 21, 2026.
- U.S. Securities and Exchange Commission, EDGAR. EDGAR Company Search (prospectus filings, where gross spread and net proceeds are disclosed). Accessed October 21, 2026.