Choose how totals are split

Discount, shipping and tax must use one common strategy. Order submission is rejected if the three settings are mixed.

Recalculate per split quote

Magento collects totals again after each smaller quote is built. Cart-price rules, shipping amounts and tax are evaluated against that split's items and address.

Use this when each resulting order should stand on its own. Be aware that thresholds and promotions may produce a different combined result after the cart is divided.

Proportional split

The extension starts with totals from the original quote and allocates them by each split quote's subtotal. It covers discount, shipping, tax and supported balance-style totals. Item-level discount and tax values are then allocated within each split.

Amounts are rounded using Magento's price rounding. Any remainder is assigned to the final split so the allocated total stays aligned with the original.

If the original subtotal is zero, groups receive equal shares.

How to choose

Use recalculation when normal Magento pricing should apply independently to every resulting order. Use proportional allocation when preserving the original checkout total is the stronger requirement. In both cases, verify the sum of all split grand totals against the customer-facing checkout total and test your actual promotion mix.