Dynamic Repricing Calculator

About the Dynamic Repricing Calculator

Dynamic repricing automatically adjusts your product price in response to competitor pricing changes. On marketplaces like Amazon, winning the Buy Box often requires matching or beating the lowest competitive price. But pricing too low destroys your margins.

This calculator simulates a rule-based repricing strategy. You set your competitor's price, an offset (how much below or above you want to be), and minimum/maximum price constraints. The tool calculates your dynamic price and shows the resulting margin.

Use this to test different repricing rules before deploying them in a real repricer. Fine-tune your offset and floor price to find the sweet spot between competitiveness and profitability.

When This Page Helps

Repricing without constraints can lead to price wars that destroy margins. This simulator lets you test offset rules and price floors before going live. It shows exactly what happens to your profit at different competitor prices, helping you set safe, profitable repricing rules.

How to Use the Inputs

1. Enter the current competitor (lowest) price for the product.
2. Enter your price offset: negative to undercut, positive to price above, zero to match.
3. Enter your minimum price floor (don't go below this).
4. Enter your maximum price ceiling.
5. Enter your product cost to see the resulting margin.
6. Adjust the offset and price constraints until you find the right balance of competitiveness and profit.

Example Calculation

Tips & Best Practices

• Set your minimum price above your break-even point to never sell at a loss.
• A $0.01 undercut is often enough to win the Amazon Buy Box — no need for large offsets.
• Use a maximum price to prevent over-pricing when competitors' prices spike temporarily.
• Monitor your average selling price (ASP) weekly to catch repricing drift.
• Consider using percentage offsets instead of fixed dollar amounts for higher-priced products.
• Account for all fees (referral, FBA, shipping) in your minimum price calculation.
• Some repricers offer "Buy Box targeting" that is more sophisticated than simple offset rules.

Rule-Based vs. Algorithmic Repricing

Rule-based repricing follows simple instructions: "Beat the lowest price by $0.01, unless below my floor." Algorithmic repricing uses machine learning to predict the optimal price considering buy box share, sales velocity, profitability, and competitor behavior. Rule-based is simpler and cheaper; algorithmic can extract more value.

Repricing on Amazon

Amazon's Buy Box algorithm considers price, fulfillment method (FBA vs. FBM), seller metrics, and inventory levels. FBA sellers with good metrics often win the Buy Box even at slightly higher prices. Price alone doesn't determine the winner, so aggressive undercutting may sacrifice margin without gaining share.

Setting Effective Price Constraints

Your minimum price should be: Cost + All Fees + Minimum Profit Target. Your maximum should be: MAP (if applicable) or the highest price that maintains reasonable sales velocity. Review constraints quarterly as costs and fees change.

Frequently Asked Questions

• What is dynamic repricing?

  Dynamic repricing is the automated adjustment of product prices in response to changes in competitor pricing, demand, or other market conditions. On Amazon, repricers monitor competing offers and adjust your price within defined rules to maximize Buy Box share and profitability.

• How much should I undercut competitors?

  On Amazon, undercutting by $0.01 is standard practice for Buy Box competition among FBA sellers with similar metrics. Larger undercuts don't significantly improve Buy Box share but do reduce your profit. For non-Amazon channels, test different offsets to find the minimum effective discount.

• What is a price floor?

  A price floor (minimum price) is the lowest price your repricer is allowed to set. It should be at or above your break-even price (cost + fees + minimum acceptable profit). Without a floor, automated repricing can spiral prices down to near zero in competitive categories.

• Can dynamic repricing start a price war?

  Yes, if multiple sellers use aggressive undercut strategies, prices can spiral downward. This is why price floors are critical. Some advanced repricers detect price wars and pause repricing or switch strategies to avoid destructive competition.

• Should I use percentage or fixed offsets?

  For products under $30, fixed offsets ($0.01–$0.50) work well. For higher-priced products, percentage offsets (0.5–2%) scale better. Some repricers support both and let you choose based on the product's price range.

• How fast do repricers adjust prices?

  Modern Amazon repricers adjust within 5–15 minutes of detecting competitor price changes. Some offer near-real-time repricing. Faster repricing is important in competitive categories with many sellers but less critical for niche products with few competitors.