diff --git a/com.unity.render-pipelines.high-definition/CHANGELOG.md b/com.unity.render-pipelines.high-definition/CHANGELOG.md
index 6ff40a07cad..c13edbec416 100644
--- a/com.unity.render-pipelines.high-definition/CHANGELOG.md
+++ b/com.unity.render-pipelines.high-definition/CHANGELOG.md
@@ -169,6 +169,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed NaNs when denoising pixels where the dot product between normal and view direction is near zero (case 1329624).
 - Fixed ray traced reflections that were too dark for unlit materials. Reflections are now more consistent with the material emissiveness.
 - Fixed pyramid color being incorrect when hardware dynamic resolution is enabled.
+- Fixed SSR Accumulation with Offset with Viewport Rect Offset on Camera
 
 ### Changed
 - Changed Window/Render Pipeline/HD Render Pipeline Wizard to Window/Rendering/HDRP Wizard
diff --git a/com.unity.render-pipelines.high-definition/Runtime/Lighting/ScreenSpaceLighting/ScreenSpaceReflections.compute b/com.unity.render-pipelines.high-definition/Runtime/Lighting/ScreenSpaceLighting/ScreenSpaceReflections.compute
index 59b248826a0..8206440f6d4 100644
--- a/com.unity.render-pipelines.high-definition/Runtime/Lighting/ScreenSpaceLighting/ScreenSpaceReflections.compute
+++ b/com.unity.render-pipelines.high-definition/Runtime/Lighting/ScreenSpaceLighting/ScreenSpaceReflections.compute
@@ -687,8 +687,10 @@ void ScreenSpaceReflectionsAccumulate(uint3 dispatchThreadId : SV_DispatchThread
     DecodeFromNormalBuffer(hitSS, hitNormalData);
     float3 hitN = hitNormalData.normalWS;
 
+    float2 prevHistoryScale = _RTHandleScaleHistory.zw / _RTHandleScaleHistory.xy;
+
     float4 original = _SSRAccumTexture[COORD_TEXTURE2D_X(positionSS)];
-    float4 previous = _SsrAccumPrev[COORD_TEXTURE2D_X(positionSS * _RTHandleScaleHistory.zw / _RTHandleScaleHistory.xy)];
+    float4 previous = _SsrAccumPrev[COORD_TEXTURE2D_X(positionSS * prevHistoryScale + 0.5f / prevHistoryScale)];
 
     float2 motionVectorNDC;
     DecodeMotionVector(SAMPLE_TEXTURE2D_X_LOD(_CameraMotionVectorsTexture, s_linear_clamp_sampler, min(hitPositionNDC.xy, 1.0f - 0.5f * _ScreenSize.zw) * _RTHandleScale.xy, 0), motionVectorNDC);
@@ -698,7 +700,7 @@ void ScreenSpaceReflectionsAccumulate(uint3 dispatchThreadId : SV_DispatchThread
     float2 positionNDC = positionSS * _ScreenSize.zw + (0.5 * _ScreenSize.zw);
     DecodeMotionVector(SAMPLE_TEXTURE2D_X_LOD(_CameraMotionVectorsTexture, s_linear_clamp_sampler, min(positionNDC, 1.0f - 0.5f * _ScreenSize.zw) * _RTHandleScale.xy, 0), motionVectorCenterNDC);
     float speedSrc = length(motionVectorCenterNDC);
-    float speed = saturate((speedDst + speedDst) * 128.0f); // 128 is arbitrary
+    float speed = saturate((speedDst + speedSrc) * 128.0f); // 128 is arbitrary
 
     float coefExpAvg = lerp(_SsrAccumulationAmount, 1.0f, speed);