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Business insights from Zazentax Resource

Move on from traditional accounting. From returns to discounts, gift cards and global VAT needs, we know ecommerce.

Excel

FBA Reimbursement Tracker

Money Amazon owes you for lost units, warehouse damage and short inbound shipments, logged with a countdown so claims are…
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Excel

Restock and Inventory Planner

When each product needs ordering, and the quantity that actually costs least once storage is counted against the freight a…
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Excel

ASIN Margin Tracker

Contribution per product after every Amazon deduction, ranked by what each one actually leaves you, so the products funded by…
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Calculators

FBA Storage Fee Estimator

What a cubic foot a month really costs per unit sold, plus the sales rate at which your stock starts…
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Calculators

FBA vs FBM Calculator

Both fulfilment routes on the same product, with your own hours costed rather than treated as free, so you can…
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Calculators

Break-Even ACoS Calculator

The advertising cost of sale above which every unit loses money, worked out from your price, fees and landed cost,…
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Checklists

E-commerce Accounting Glossary

Every accounting and tax term a UK online seller runs into, defined in plain English, with the free calculator or…
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