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Cairos for law firms

The invoicing software for law firms

The fee note carries withholding, the provisión de fondos may or may not carry VAT depending on what it is for, court fees and the procurador are suplidos that are not income of yours, and a matter can last three years. A Word template settles none of those four things.

Withholding set per clientSuplidos outside the taxable baseCost and income per case
erp.cairos.es
General
Dashboard
Invoices
Quotes
Contacts
Expenses
Products
Accounting
14.280 €
Billed this month
2.142 €
IRPF withheld
1.860 €
Suplidos advanced
9
Open case files
M-2026/0091Ilex Consulting SL · retainer1.210,00 €15% withholding
M-2026/0090Claim · private individual1.815,00 €No withholding
S-0044Court fee · suplido300,00 €Outside the base
PF-0018Advance on account605,00 €Paid
What changes

What is particular about invoicing in a law firm

A firm does not invoice products: it invoices time and advances its clients' money. That is where its four particularities come from.

Every fee note carries withholding

When you invoice a company or another professional, they withhold 15% of IRPF. The reduced 7% applies in the tax year you register and in the two following ones — not “three years” counted from the date — only if you did not carry on a professional activity the previous year, and you have to tell the client in writing. It is money you do not receive and that your client pays over in your name on their form 111.

Suplidos and provisiones are not the same thing

The court fee or the procurador's invoice paid on your client's behalf are suplidos: they go on the fee note without VAT and outside the taxable base, provided you pay them in the client's name under their express instruction and can evidence the amount. In exchange, you do not deduct that VAT. An advance on account of fees, by contrast, does make VAT chargeable when you receive it.

The matter lasts longer than the financial year

A case opened in March gets billed in three fee notes spread over two years. Without treating the case file as a cost centre, there is no way to know what each matter left behind or how much of what was agreed has already been invoiced.

Retainers every month

Ongoing advice is charged with a monthly retainer that has to be issued on the right day, with its sequential numbering and its withholding. It is the firm's most predictable income and the one most often forgotten.

Day to day

How it is done today, and how it looks with Cairos

In a small firm the bottleneck is not the law. It is the administration.

Day-to-day work in law firms

Without Cairos

  • Fee notes are done in Word and the withholding is worked out by hand.
  • Suplidos get entered as income and fatten the taxable base.
  • Provisiones de fondos get recorded as loose payments received, with no VAT.
  • Nobody knows how much has been invoiced on a long matter.
  • Retainers get issued when somebody remembers.

With Cairos

  • The withholding is applied on its own according to the client and the year you registered.
  • Suplidos go on their own line, without VAT and outside the base.
  • The advance is issued as it should be and deducted from the final fee note.
  • Each case file carries what has been invoiced, what is outstanding and what it has cost.
  • Retainers are issued on their own each month, on their date and with their number.
Taxes

The fee note, line by line

A properly drawn fee note has up to four kinds of line, and each one is taxed differently. This is the difference between invoicing properly and invoicing too much.

ItemHow it is goingWhy
Fees to a company21% VAT and −15% IRPFThe company is obliged to withhold and pay it over on its form 111.
Fees in the year you register and the two following years21% VAT and −7% IRPFThe reduced rate for someone starting a professional activity who did not carry it on in the previous year; you have to tell the client.
Fees to a private individual21% VAT, no withholdingA private individual does not withhold. That is why working for private individuals usually forces you into form 130.
Suplidos: court fees, the procurador, registriesNo VAT and outside the taxable baseArt. 78.Tres.3º: paid in the client's name under express instruction, with a receipt, and without you deducting that VAT.
Provisión de fondos on account of feesWith VAT when it is receivedIt is an advance on your work: under art. 75.Dos, VAT becomes chargeable at that moment.
An advance to pay suplidosNo VATIt pays for no service of yours.
Advice to a company in another EU countryWithout Spanish VATThe place of supply is where the customer is: you have to be on the ROI, put the reverse charge reference on the fee note and file form 349.

Cairos leaves the withholding set on the client's record and allows suplido lines that add to the total but not to the taxable base, which is exactly how they have to go. The line between a suplido and an expense of your own is a narrow one and article 78.Tres.3º of the VAT Act draws it: if the receipt is in your name, it is not a suplido, it is an expense of yours that you pass on with VAT.

The modelos you end up filing

FormWhenWhy in your case
303QuarterlyThe VAT on the fee notes less the VAT on the firm's expenses.
130QuarterlyOnly if less than 70% of your income carries a withholding. Cairos checks it.
111QuarterlyIf you have staff or pay other professionals with a withholding.
115QuarterlyThe withholding on the office rent.
349Quarterly or monthlyIf you advise companies in other EU countries. It is monthly by default and it only goes quarterly if you do not exceed €50,000 in the quarter or in the four preceding ones.
347FebruaryCustomers and suppliers above €3,005.06 a year. Fee notes with withholding are excluded: those already travel on your client's 190.

Try it with your firm's invoices

Free plan with up to 30 documents a year, no card needed. And if it does not work for you, your data leaves with you.

Questions from law firms

Yes. They are added as a suplido line: they appear in the fee note's total to pay but they are not part of the taxable base and they carry no VAT. That is how they should go when you pay the court fee or the procurador in your client's name, under their express instruction, and the receipt is in their name. If the receipt comes in your name it is not a suplido: it is an expense of yours, and it is passed on with VAT.
It depends what it is for. If it is on account of your fees, VAT becomes chargeable when you receive it and it is then deducted from the final fee note. If it is to pay suplidos on the client's behalf, no VAT arises. Cairos allows both.
Only if less than 70% of your previous year's income had withholding applied, which is what happens when you work a lot for private individuals. It is an exception exclusive to professional activities, and in the first year it is not the previous year that is looked at but the quarter itself. Cairos works it out from your real invoices and tells you. More detail on the form 130 page.
Yes. The Ámbar plan gives up to five users with permissions, and the Jade plan, ten users and up to three companies, which is usually what is needed when there is a service S.L. and a partner or two invoicing separately.
No. Cairos is invoicing, accounting and taxes; case management you carry on doing with your practice management program. We say so plainly because it is the first question a lawyer asks.

Your firm invoices differently. So does the program.

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