---
title: "ReferenceRates – API-Referenz · Quittio"
description: "The reference interest rate of a country's late payment law, e.g. the German Basiszinssatz (section 247 BGB) or the ECB main refinancing rate. Default interest is the reference rate plus the points of the DunningLaw."
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meta:
  "og:description": "The reference interest rate of a country's late payment law, e.g. the German Basiszinssatz (section 247 BGB) or the ECB main refinancing rate. Default interest is the reference rate plus the points of the DunningLaw."
  "og:image": "https://quittio.dev/og/quittio-de.jpg"
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  "og:title": "ReferenceRates – API-Referenz · Quittio"
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---

> Index of every page on this site: [llms.txt](https://quittio.dev/llms.txt)

[API reference](https://quittio.dev/docs/api) / [Quittio](https://quittio.dev/docs/api/Quittio) \\ [Core](https://quittio.dev/docs/api/Quittio/Core) \\ [Dunning](https://quittio.dev/docs/api/Quittio/Core/Dunning)

# ReferenceRates

interface in quittio/core

`Quittio\Core\Dunning\ReferenceRates` · [Source](https://github.com/Quittio/quittio/blob/v0.7.1/packages/core/src/Dunning/ReferenceRates.php#L16)

The reference interest rate of a country's late payment law, e.g. the German Basiszinssatz (section 247 BGB) or the ECB main refinancing rate. Default interest is the reference rate plus the points of the DunningLaw.

## Methods \#

| Method | Description |
| --- | --- |
| `->periods()` | Periods with a constant rate between two dates (inclusive start, exclusive end). |
| `->rateOn()` | The rate in percent on the date. |

### `periods()`#

```
public function periods(
    Date $from,
    Date $until,
): list<array{from: Date, until: Date, rate: BigDecimal}>
```

Periods with a constant rate between two dates (inclusive start, exclusive end).

| Parameter | Type | Description |
| --- | --- | --- |
| `$from` | `[Date](https://quittio.dev/docs/api/Quittio/Core/Support/Date)` | |
| `$until` | `[Date](https://quittio.dev/docs/api/Quittio/Core/Support/Date)` | |

<dl><dt>Returns</dt>
<dd><code>list&lt;array{from: <a href="https://quittio.dev/docs/api/Quittio/Core/Support/Date">Date</a>, until: <a href="https://quittio.dev/docs/api/Quittio/Core/Support/Date">Date</a>, rate: Brick\Math\BigDecimal}&gt;</code></dd>
<dt>Throws</dt>
<dd><code><a href="https://quittio.dev/docs/api/Quittio/Core/Exceptions/InvalidArgumentException">InvalidArgumentException</a></code> – when no rate is known for part of the time</dd></dl>

### `rateOn()`#

```
public function rateOn(Date $date): BigDecimal
```

The rate in percent on the date.

| Parameter | Type | Description |
| --- | --- | --- |
| `$date` | `[Date](https://quittio.dev/docs/api/Quittio/Core/Support/Date)` | |

<dl><dt>Returns</dt>
<dd><code>Brick\Math\BigDecimal</code></dd>
<dt>Throws</dt>
<dd><code><a href="https://quittio.dev/docs/api/Quittio/Core/Exceptions/InvalidArgumentException">InvalidArgumentException</a></code> – when no rate is known for the date</dd></dl>

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