diff --git a/sdk/action/client.go b/sdk/action/client.go
index 147be819..296cba9c 100644
--- a/sdk/action/client.go
+++ b/sdk/action/client.go
@@ -298,9 +298,11 @@ func (c *ClientImpl) BuildCascadeMetadataFromFile(ctx context.Context, filePath
 	denom := paramsResp.Params.BaseActionFee.Denom
 	exp := paramsResp.Params.ExpirationDuration
 
-	// Compute data size in KB for fee
-	kb := int(fi.Size()) / 1024
-	feeResp, err := c.lumeraClient.GetActionFee(ctx, strconv.Itoa(kb))
+	// Compute data size in KB for fee, rounding up to avoid underpaying
+	// Keep consistent with supernode verification which uses ceil(bytes/1024)
+	sizeBytes := fi.Size()
+	kb := (sizeBytes + 1023) / 1024 // int64 division
+	feeResp, err := c.lumeraClient.GetActionFee(ctx, strconv.FormatInt(kb, 10))
 	if err != nil {
 		return actiontypes.CascadeMetadata{}, "", "", fmt.Errorf("get action fee: %w", err)
 	}
diff --git a/supernode/cascade/helper.go b/supernode/cascade/helper.go
index a2006354..2d204c52 100644
--- a/supernode/cascade/helper.go
+++ b/supernode/cascade/helper.go
@@ -195,13 +195,16 @@ func (task *CascadeRegistrationTask) verifyActionFee(ctx context.Context, action
 	}
 	requiredFee := sdk.NewCoin("ulume", math.NewInt(amount))
 	logtrace.Debug(ctx, "calculated required fee", logtrace.Fields{"fee": requiredFee.String(), "dataBytes": dataSize})
-	if action.Price == nil || action.Price.String() != requiredFee.String() {
-		got := "<nil>"
-		if action.Price != nil {
-			got = action.Price.String()
-		}
-		return task.wrapErr(ctx, "insufficient fee", errors.Errorf("expected at least %s, got %s", requiredFee.String(), got), fields)
+	// Accept paying more than the minimum required fee. Only enforce denom match and Amount >= required.
+	if action.Price == nil {
+		return task.wrapErr(ctx, "insufficient fee", errors.Errorf("expected at least %s, got <nil>", requiredFee.String()), fields)
+	}
+	if action.Price.Denom != requiredFee.Denom {
+		return task.wrapErr(ctx, "invalid fee denom", errors.Errorf("expected denom %s, got %s", requiredFee.Denom, action.Price.Denom), fields)
+	}
+	if action.Price.Amount.LT(requiredFee.Amount) {
+		return task.wrapErr(ctx, "insufficient fee", errors.Errorf("expected at least %s, got %s", requiredFee.String(), action.Price.String()), fields)
 	}
-	logtrace.Info(ctx, "register: verify action fee ok", logtrace.Fields{"required_fee": requiredFee.String()})
+	logtrace.Info(ctx, "register: verify action fee ok", logtrace.Fields{"required_fee": requiredFee.String(), "provided_fee": action.Price.String()})
 	return nil
 }