How to Use This Tool
Compare merchandise, shipping and mandatory charges on the same checkout basis. Check channel price parity from merchandise, shipping and mandatory charges, showing the absolute and percentage checkout difference.
The decision this tool supports
Sticker-price comparison can label two channels equal even when mandatory shipping or service charges create a different customer checkout total. This page keeps the decision bounded to absolute checkout difference and the supporting outputs shown beside it. Channel Price Parity does not import an account, infer a market rate, or silently substitute an industry average.
Inputs and units
The Channel Price Parity calculation uses Channel A merchandise, Channel A shipping, Channel A mandatory charges, Channel B merchandise, Channel B shipping, Channel B mandatory charges. Keep all money values in one currency and all time, distance, mass, energy or volume entries in the unit printed beside the field. Mixing Channel Price Parity scopes can produce a plausible number with the wrong meaning.
- Channel A merchandise is entered in currency.
- Channel A shipping is entered in currency.
- Channel A mandatory charges is entered in currency.
- Channel B merchandise is entered in currency.
- Channel B shipping is entered in currency.
- Channel B mandatory charges is entered in currency.
Formula and worked check
Checkout total = merchandise + shipping + mandatory entered charges; parity difference is the absolute gap and its percentage of the lower total. Channel A totals $88 and Channel B also totals $88 despite different merchandise and shipping components, so the parity gap is $0. The Channel Price Parity default is an executable known-answer case, not a benchmark or recommendation. Change one input and verify that the direction of absolute checkout difference still matches the stated relationship.
How to interpret the result
A zero gap means parity only for the entered basket and charge basis; document promotions, membership benefits and tax treatment separately. The additional Channel Price Parity outputs expose the denominator, comparison, capacity or reverse value needed to audit the primary result instead of presenting one unexplained number.
Assumptions
- Both channels describe the same product, quantity and fulfillment promise.
- Only mandatory comparable charges are entered.
- All values use one currency and tax basis.
Save the Channel Price Parity input values and date with any material decision. A later Channel Price Parity rerun is reproducible only when the same assumptions and units are available.
Limitations and safety boundary
It does not interpret contractual parity clauses, calculate tax, fetch live prices, value loyalty benefits or decide whether channels are legally comparable. Channel Price Parity is an estimate and cannot replace a contract, local code, licensed professional, calibrated measurement, lender statement or platform report where one governs the decision.
Source and privacy
The Channel Price Parity definition or rule was checked against U.S. Small Business Administration — Manage your finances on 2026-08-26. Recheck U.S. Small Business Administration — Manage your finances when a specification or policy behind Channel Price Parity can change. Channel Price Parity arithmetic runs in this browser tab; ecech does not receive the values through a calculation API.
Sources & assumptions
Tool Spec v2 · verified 2026-08-26. Platform rules and fees can change; the editable inputs remain authoritative for your account.
Official references
- U.S. Small Business Administration — Manage your finances (checked 2026-08-26)
Model assumptions
- Both channels describe the same product, quantity and fulfillment promise.
- Only mandatory comparable charges are entered.
- All values use one currency and tax basis.
- It does not interpret contractual parity clauses, calculate tax, fetch live prices, value loyalty benefits or decide whether channels are legally comparable.
