# REGIME_KEY_NOT_SUPPORTED

Regime key ‹value› is not available. Keys 06 and 14 require data the invoice does not carry (06, the cost-based taxable base; 14, an operation date after the issue date and a public-administration recipient). Key 03 requires the invoice not to show the tax separately (RD 1619/2012, art. 16.2.c), and the invoice always does. Use the key that fits the operation

<Callout type="info">
**Category:** [Invoices](/errors/category/invoicing)
</Callout>

| | |
|---|---|
| HTTP status | `422` Unprocessable Content |
| Retry | After fixing the cause |

## When it happens

A line, or the default of the tax configuration, carries `regime_key` `03`, `06` or `14`. Under `03` the invoice must not show the tax separately, and a BeeL. invoice always does; with `06` and `14` AEAT requires data the invoice does not carry.

## How to fix it

Use another regime key. A corrective invoice of an original that already carried one of these keys keeps it.

## Retry

Not as is: the same request fails the same way. Fix the cause described above, then send the request again, under a new `Idempotency-Key` if the body changed.

## Returned by

The operations where this code is most likely. The list is not exhaustive.

- [`POST /v1/companies/{company_id}/invoices`](/invoices/createCompanyInvoice)
- [`PATCH /v1/companies/{company_id}/invoices/{invoice_id}`](/invoices/patchCompanyInvoice)
- [`POST /v1/companies/{company_id}/invoices/{invoice_id}/issue`](/invoices/issueCompanyInvoice)
- [`PUT /v1/companies/{company_id}/tax-configuration`](/tax-configuration/updateCompanyTaxConfiguration)

## Rules that cite this code

- [TAX-016 · Regime keys 03, 06 and 14 are not accepted](/rules/taxes#tax-016)

## Example response

When this error occurs, the API answers `422` Unprocessable Content with a JSON body of this shape:

```json
{
  "type": "https://docs.beel.es/errors/REGIME_KEY_NOT_SUPPORTED",
  "title": "REGIME_KEY_NOT_SUPPORTED",
  "detail": "Regime key ‹value› is not available. Keys 06 and 14 require data the invoice does not carry (06, the cost-based taxable base; 14, an operation date after the issue date and a public-administration recipient). Key 03 requires the invoice not to show the tax separately (RD 1619/2012, art. 16.2.c), and the invoice always does. Use the key that fits the operation",
  "instance": "/v1/<resource>",
  "errors": [],
  "success": false,
  "error": {
    "code": "REGIME_KEY_NOT_SUPPORTED",
    "message": "Regime key ‹value› is not available. Keys 06 and 14 require data the invoice does not carry (06, the cost-based taxable base; 14, an operation date after the issue date and a public-administration recipient). Key 03 requires the invoice not to show the tax separately (RD 1619/2012, art. 16.2.c), and the invoice always does. Use the key that fits the operation",
    "details": {}
  },
  "meta": {
    "timestamp": "2026-05-21T10:00:00Z",
    "request_id": "4bf92f3577b34da6a3ce929d0e0e4736"
  }
}
```

The `type` URI is stable and always resolves to this page.

## Message

<Tabs items={["English", "Spanish", "Catalan"]}>
  <Tab value="English">{"Regime key ‹value› is not available. Keys 06 and 14 require data the invoice does not carry (06, the cost-based taxable base; 14, an operation date after the issue date and a public-administration recipient). Key 03 requires the invoice not to show the tax separately (RD 1619/2012, art. 16.2.c), and the invoice always does. Use the key that fits the operation"}</Tab>
  <Tab value="Spanish">{"La clave de régimen ‹value› no está disponible. La 06 y la 14 exigen datos que la factura no lleva (la 06, la base imponible a coste; la 14, una fecha de operación posterior a la de expedición y un destinatario Administración Pública). La 03 exige que la cuota no figure por separado en la factura (RD 1619/2012, art. 16.2.c), y la factura siempre la desglosa. Usa la clave que corresponda a la operación"}</Tab>
  <Tab value="Catalan">{"La clau de règim ‹value› no està disponible. La 06 i la 14 exigeixen dades que la factura no porta (la 06, la base imposable a cost; la 14, una data d'operació posterior a la d'expedició i un destinatari Administració Pública). La 03 exigeix que la quota no figuri per separat a la factura (RD 1619/2012, art. 16.2.c), i la factura sempre la desglossa. Fes servir la clau que correspongui a l'operació"}</Tab>
</Tabs>

Send the request with `Accept-Language: <es|en|ca>` to receive the message in your preferred language.

> Placeholders like `‹value›` are filled in at runtime with the actual values of your request.

## Other errors in this category

<div className="grid grid-cols-2 gap-3 not-prose">
  <Card title="ATTACH_SOURCE_INVOICE_UNAVAILABLE" description="A source invoice is not available (it does not exist or you no longer have access); uncheck the source invoices attachment to send without the folder" href="/errors/ATTACH_SOURCE_INVOICE_UNAVAILABLE" />
  <Card title="ATTACH_SOURCE_INVOICES_NO_SOURCES" description="The invoice has no consolidation disbursements: there are no source invoices to attach" href="/errors/ATTACH_SOURCE_INVOICES_NO_SOURCES" />
  <Card title="ATTACH_SOURCE_INVOICES_REQUIRES_PDF" description="Attaching the source invoices also requires attaching the invoice PDF" href="/errors/ATTACH_SOURCE_INVOICES_REQUIRES_PDF" />
  <Card title="ATTACH_SOURCE_PDF_MISSING" description="These source invoices have no generated PDF: ‹value›" href="/errors/ATTACH_SOURCE_PDF_MISSING" />
  <Card title="ATTACH_SOURCE_ZIP_TOO_LARGE" description="The source invoices ZIP (‹value› MB) exceeds the maximum sendable size (‹value› MB)" href="/errors/ATTACH_SOURCE_ZIP_TOO_LARGE" />
</div>

## Keep exploring

<div className="grid grid-cols-2 gap-3 not-prose">
  <Card title="All Invoices errors" description="Every code in this category in one table." href="/errors/category/invoicing" />
  <Card title="Error reference home" description="Browse every category or jump to the handling guide." href="/errors" />
</div>

---

Full OpenAPI spec: https://docs.beel.es/api/openapi