diff --git a/PreciseNumber.Test/PreciseNumberParseTrailingNulTests.cs b/PreciseNumber.Test/PreciseNumberParseTrailingNulTests.cs
new file mode 100644
index 0000000..7fce253
--- /dev/null
+++ b/PreciseNumber.Test/PreciseNumberParseTrailingNulTests.cs
@@ -0,0 +1,54 @@
+// Copyright (c) 2023-2026 ktsu-dev contributors
+
+namespace ktsu.PreciseNumber.Test;
+
+using System.Globalization;
+
+/// <summary>
+/// Covers the run of trailing <c>'\0'</c> characters the BCL parsers ignore, which text read out of a
+/// fixed-size or NUL-padded buffer ends with. Each case is checked against <see cref="decimal"/>
+/// parsing the same text with the same style, so the expectation is the BCL's rather than ours.
+/// </summary>
+[TestClass]
+public class PreciseNumberParseTrailingNulTests
+{
+	[TestMethod]
+	[DataRow("5\0", NumberStyles.None)]
+	[DataRow("5\0", NumberStyles.Float)]
+	[DataRow("1.5\0\0\0", NumberStyles.Float)]
+	[DataRow("1e3 \0", NumberStyles.Float)]
+	[DataRow("12345\0\0\0\0\0\0\0\0", NumberStyles.Integer)]
+	[DataRow("-0.25\0", NumberStyles.Number)]
+	public void ParseIgnoresTrailingNulsAsDecimalDoes(string text, NumberStyles style)
+	{
+		CultureInfo culture = CultureInfo.InvariantCulture;
+		Assert.IsTrue(decimal.TryParse(text, style, culture, out decimal expected), "The case must be one decimal accepts.");
+		PreciseNumber expectedNumber = expected.ToPreciseNumber();
+
+		Assert.AreEqual(expectedNumber, PreciseNumber.Parse(text, style, culture));
+		Assert.AreEqual(expectedNumber, PreciseNumber.Parse(text.AsSpan(), style, culture));
+
+		Assert.IsTrue(PreciseNumber.TryParse(text, style, culture, out PreciseNumber fromString));
+		Assert.AreEqual(expectedNumber, fromString);
+
+		Assert.IsTrue(PreciseNumber.TryParse(text.AsSpan(), style, culture, out PreciseNumber fromSpan));
+		Assert.AreEqual(expectedNumber, fromSpan);
+	}
+
+	[TestMethod]
+	[DataRow("1.5\0 ", NumberStyles.Float)]
+	[DataRow("\0 5", NumberStyles.Float)]
+	[DataRow("\0", NumberStyles.Float)]
+	[DataRow("\0\0\0", NumberStyles.Float)]
+	[DataRow("5 \0", NumberStyles.None)]
+	[DataRow("5\0" + "1", NumberStyles.Float)]
+	public void ParseStillRejectsNulsThatAreNotTheLastCharacters(string text, NumberStyles style)
+	{
+		CultureInfo culture = CultureInfo.InvariantCulture;
+		Assert.IsFalse(decimal.TryParse(text, style, culture, out _), "The case must be one decimal rejects.");
+
+		Assert.IsFalse(PreciseNumber.TryParse(text, style, culture, out _));
+		Assert.IsFalse(PreciseNumber.TryParse(text.AsSpan(), style, culture, out _));
+		Assert.ThrowsExactly<FormatException>(() => PreciseNumber.Parse(text, style, culture));
+	}
+}
diff --git a/PreciseNumber/PreciseNumber.cs b/PreciseNumber/PreciseNumber.cs
index 602eeaf..8a5c81c 100644
--- a/PreciseNumber/PreciseNumber.cs
+++ b/PreciseNumber/PreciseNumber.cs
@@ -1222,6 +1222,7 @@ public static PreciseNumber Parse(ReadOnlySpan<char> s, NumberStyles style, IFor
 			throw new ArgumentException(UnsupportedParseStylesMessage, nameof(style));
 		}
 
+		s = TrimTrailingNuls(s);
 		s = TrimAllowedWhite(s, style);
 
 		if (s.IsEmpty)
@@ -1403,6 +1404,21 @@ private static PreciseNumber FromParsedParts(ReadOnlySpan<char> digits, int deci
 	/// </summary>
 	private const string AllowedWhite = " \t\n\v\f\r";
 
+	/// <summary>
+	/// Removes the run of <c>'\0'</c> characters that ends <paramref name="s"/>, as the BCL parsers
+	/// ignore it, so that text from a NUL-padded buffer parses the way <see cref="decimal"/> reads it.
+	/// </summary>
+	/// <remarks>
+	/// Under every style, white space included: the NULs are dropped only when they are the very last
+	/// characters, and only when something else comes before them, so text that is nothing but NULs
+	/// is still an error.
+	/// </remarks>
+	private static ReadOnlySpan<char> TrimTrailingNuls(ReadOnlySpan<char> s)
+	{
+		ReadOnlySpan<char> trimmed = s.TrimEnd('\0');
+		return trimmed.IsEmpty ? s : trimmed;
+	}
+
 	/// <summary>Trims the leading and trailing white space that <paramref name="style"/> allows.</summary>
 	private static ReadOnlySpan<char> TrimAllowedWhite(ReadOnlySpan<char> s, NumberStyles style)
 	{