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Invoice Generator

Create a clean, printable invoice with live preview — items, tax, discount and PDF export.

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Invoice Late Fee CalculatorWork out the late fee and total due on an overdue invoice from annual, monthly or flat charges, with grace period, minimum and cap.Cash Ratio CalculatorDivide cash and marketable securities by current liabilities — the strictest liquidity test, with the share of short-term debt payable today.Six Sigma Process Capability Calculator (Cp, Cpk, Pp, Ppk)Cp against Cpk is the whole point: Cp assumes the process sits centred between the limits, Cpk does not, so a process can score an excellent Cp and a dreadful Cpk simply by drifting off target. Work from summary statistics, or paste raw measurements in subgroups and get σ_within from R̄/d₂ (Cp, Cpk) alongside σ_overall (Pp, Ppk) — two different numbers that are constantly confused. Sigma level, DPMO, expected yield and a chart against the spec limits round it off; one-sided specs are supported.Inventory shrinkage calculatorMeasure inventory shrinkage as a percentage and value from book vs counted stock.Straight-line depreciation calculatorCompute the yearly straight-line depreciation of an asset.Average collection period calculatorHow many days, on average, it takes to collect payment after a credit sale: average receivables ÷ net credit sales × days in the period. A lower number means faster cash collection and healthier cash flow.Calendar event (.ics)Create a calendar event and download it as an .ics file for any app.Capacity utilization calculatorCompute how much of your production capacity is actually being used.

Invoice Generator works straight from this page — free, instant, nothing to install. Its place is under Planning & operations; Invoice Late Fee Calculator and Cash Ratio Calculator answer the questions closest to this one.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What does Invoice Generator do?

Create a clean, printable invoice with live preview — items, tax, discount and PDF export.

When would I actually use this?

Running the week: issuing an invoice or a quote, knowing what is in stock and what to reorder, and seeing whether cash covers what is due.

What is the most common mistake?

Reading profit as cash. A profitable month with sixty-day payment terms can still leave the account empty — the two numbers answer different questions.

How is Invoice Generator different from Invoice Late Fee Calculator?

They sit next to each other but answer different questions: Invoice Late Fee Calculator is the one to open when you need it to work out the late fee and total due on an overdue invoice from annual, monthly or flat charges, with grace period, minimum and cap. Pick whichever matches what you're starting from — both are free.

Where do the figures come from?

The arithmetic is exact for what you enter. Invoice content, VAT treatment and mandatory mentions are set by national rules — an invoice that computes correctly can still be non-compliant.

Further reading

All guides →
ExplainerA Quotation: What Commits You Legally, and What Must Appear On ItThe same document has opposite default effects on either side of the Rhine: in France a signed fixed-price quotation forbids any increase, in Germany an estimate carries no guarantee of correctness unless the contractor took one on. Plus the particulars that are general, the ones that are trade rules, and why a free quotation is not free.GuideAn Unpaid Invoice: The Late-Payment Interest the Law Already Grants YouYou do not need a penalty clause. A European directive gives every business creditor a statutory interest rate and a fixed recovery sum, both due automatically, and a term in the contract trying to take them away is void or presumed unfair. Here are the current rates and what they produce on a real invoice.GuideInvoicing a Client in Another EU Country: VAT, the Reverse Charge and the One Stop ShopTwo regimes get merged into one paragraph everywhere, and they behave nothing alike. Selling a service to a business abroad and selling to a private customer abroad are governed by different articles, different thresholds and different filings. Here is the split, with the current figures.How-toFrom a Day Rate to Money in the Bank: the Whole Chain in France, Germany and ItalyA day rate is a price, not an income. Between the invoice and the bank balance sit six separate subtractions, and in three European countries they are ordered differently, capped differently and paid at different times. Here is the whole chain with the 2026 figures that are verifiable and an honest note on the ones that are not.ExplainerThe Turnover Thresholds That Switch Your Regime — and What Crossing One Costs on the DayFour European countries, four different answers to the same question: at what point does a small business stop being treated as small? The thresholds matter less than the clock attached to them — some bite the day you cross, others wait for January.ExplainerProcess Capability: Cp, Cpk and What Six Sigma Actually ClaimsCp compares the spec width to the process spread; Cpk penalises being off-centre. A process can have an excellent Cp and still make scrap — here is the case, with defect rates computed from the normal distribution rather than read off a table.