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Markus Michalski

Variant Price Surcharge

by Markus Michalski
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MmdVariantPriceSurcharge
MmdVariantPriceSurcharge
MmdVariantPriceSurcharge
MmdVariantPriceSurcharge
Calculate variant prices automatically using percentages and/or fixed surcharges from the parent price. Ideal for size tiers, option surcharges, and license models-
15% discount In comparison to the regular monthly price
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Compatible with:
6.6.0.0 - 6.7.11.0
Includes:
The subscription starts with a free trial month during which it can be canceled at any time.
During the subscription all released updates are included for free
In case you have any questions or problems with your extension you can always ask the Extension Partner for help during the subscription.

Description

Highlights

  • - Percentage + fixed surcharge combinable — one formula for all pricing scenarios
  • - Field-specific inheritance — configure centrally on parent or individually per variant
  • - Cart integration — correct prices throughout the entire checkout process incl. tax recalculation
  • - Configurable rounding — 4 rounding modes for precise price display
  • - Storefront-optimized — no admin performance overhead, active only in the frontend

Features

  • - Percentage-based pricing from parent product price (0–1000%)
  • - Fixed price surcharges in EUR (positive or negative)
  • - Combined mode: percentage and surcharge used simultaneously
  • - Per-variant activation via custom fields
  • - Field-specific inheritance: inherit values from parent product
  • - Full cart and checkout integration with tax recalculation
  • - Configurable rounding mode (HALF_UP, HALF_DOWN, HALF_EVEN, HALF_ODD)
  • - Adjustable decimal places for rounded prices
  • - Multi-currency support with automatic currency fallback
  • - NaN/INF protection: prices never go negative
  • - Storefront-optimized: no admin overhead
  • - Request-level caching for parent product lookups (N+1 prevention)
  • - PHPStan level 8 verified, CI/CD pipeline with tests

About the Extension

Problem: Maintaining variant prices manually?

If you sell variants with size-dependent or option-based pricing, you know the issue: every time the parent price changes, all variants need manual adjustment. This plugin solves it with a simple formula:

Variant Price = (Parent Price + Fixed Surcharge) × (Percentage / 100)


Core Features

  • Percentage calculation: Variant price as a fraction of the parent price (0–1000%)
  • Fixed surcharges: Add or subtract absolute EUR amounts
  • Combined mode: Use both percentage AND surcharge simultaneously
  • Per-variant activation: Controlled individually via custom fields
  • Field-specific inheritance: Values not set on the variant are automatically inherited from the parent
  • Cart & checkout: Correct prices throughout the checkout process incl. tax recalculation
  • 4 rounding modes: HALF_UP, HALF_DOWN, HALF_EVEN, HALF_ODD — configurable mode and decimal places
  • Multi-currency: Currency-specific parent price resolution with fallback
  • NaN/INF protection: Robust validation — calculated prices never go negative


How it works

After installation, three custom fields are available at product level: Enable surcharge, Percentage, and Fixed surcharge. Simply configure them on the desired variant (or centrally on the parent product) — the price is automatically calculated in the storefront and cart.

The admin continues to show the original price to maintain performance.


Use Cases

  • Size variants: S = 80%, M = 100%, L = 120%, XL = 140% of the base price
  • Software licenses: 1 User = 50%, 5 Users = 100%, 10 Users = 150%
  • Product options: Base product + zipper (+3 EUR) + size XL (+5 EUR)
  • Volume discounts: 3-pack (-5 EUR), 5-pack (-8 EUR) via negative surcharges
  • Combination: Size surcharge (120%) + option surcharge (+8 EUR) in one variant


Important Notes

The variant's own price is ignored — only the parent product price with surcharge and percentage is used. The admin intentionally shows the original price to avoid impacting admin performance.


Documentation

Comprehensive documentation with practical examples and troubleshooting is available at faq.markus-michalski.net.

Details

  • Available: English, German
  • Latest update: 16 June 2026
  • Publication date: 17 June 2026
  • Version: 1.1.2
  • Category: Product Configuration

Resources

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About the Extension Partner

Markus Michalski

Markus Michalski

See all extensions

Partner Status

  • Shopware Extension Partner Shopware
    Extension Partner

Details

  • Partner since: 2026
  • Extensions: 6

Support

  • Based in: Germany
  • Speaks: German, English
  • Response time: Very quickly