diff --git a/README.md b/README.md
index 07e9cfe..732c763 100644
--- a/README.md
+++ b/README.md
@@ -16,4 +16,47 @@ results = $.parse(csvString, {
 
 The default delimiter is `,` but can be set to anything anything except `"` or `\n`.
 
-By default, a header row is expected. The output and error handling depends on whether you include a header row with your data.
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+By default, a header row is expected. The output and error handling depends on whether you include a header row with your data.
+
+**If `header: true`, the output looks like:**
+
+```javascript
+{
+	errors: [
+		// errors, if any (parsing should not throw exceptions)
+	],
+	results: {
+		fields: [
+			// field names from the header row
+		],
+		rows: [
+			// objects, where each field value is keyed to the field name
+		]
+	}
+}
+```
+
+
+**If `header: false`, the output looks like:**
+
+```javascript
+{
+	errors: [
+		// errors, if any (parsing should not throw exceptions)
+	],
+	results: [
+		// each row is itself an array of values separated by delimiter
+	]
+}
+```
+
+**Errors look like:**
+
+```javascript
+{
+	message: "",	// Human-readable message
+	line: 0,		// Line of original input
+	row: 0,			// Row index where error was
+	index: 0		// Character index within original input
+}
+```
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