Grow · Stop running out, stop overstocking

RP knows when to reorder - before Amazon fines you.

Upload your sales report and supplier lead times. RP returns the reorder date, order quantity, order capital and net profit for each ASIN - counting units you already have on order - and flags Chinese New Year, Q4 demand, orders that would buy more than ~180 days of stock (Amazon's aged-inventory surcharge starts at 181 days) and Amazon's Low-Inventory-Level fee 28-day threshold.

Plan my restocks - $29 See sample plan →

Included in Pro & Agency · or $29 one-time

One-time $29 (vs $79+/mo subscription tools) Reorder plan in about a minute Excel calculator with live formulas

Why this matters in 2026

Wrong inventory timing costs thousands

Out-of-stock

Lose BSR, lose Buy Box, lose organic ranking - and customers go to your competitor.

Costs $1000s/mo on top ASINs

Aged storage fees

Amazon's aged-inventory surcharge starts at 181 days ($0.50/cu ft) and jumps to $5.45–$7.90/cu ft after 270 days, with its top tier from 456 days. Oct–Dec storage is $2.40/cu ft (standard size). Overstock eats your margin silently.

Starts at 181 days in stock

Low-Inventory-Level fee

Amazon charges it when both your 30- and 90-day historical days of supply drop below 28 (assessed per FNSKU since Jan 2026). A ~35-day buffer keeps you clear.

$0.32–$1.11/unit (standard size)

How it works

Sales report in. Reorder plan out.

Upload Sales Report

Seller Central → Reports → Business Reports → Detail Page Sales and Traffic by Child Item. Pick any date range (30 or 90 days work well) - then tell RP how many days the report covers. CSV format, takes 2 minutes.

Enter your basics

Supplier lead time, MOQ, FBA inbound transit time, current on-hand inventory and any units already on order. RP handles the rest.

Get your reorder plan

Reorder date, order quantity, order capital and net profit for each ASIN - as a PDF and an Excel file with live formulas.

What RP factors in

Eight variables, not just sales velocity

Most spreadsheet calculators only do sales / days. Restock Planner accounts for 2026 reality.

Sales velocity from your reportAverage daily units over the date range your Business Report covers.

Supplier lead time + FBA inboundFrom PO to FBA receipt - including ocean/air freight + check-in time.

Chinese New Year shutdownWhen a PO's supplier lead time overlaps the Chinese New Year factory shutdown (assumed Jan 18 - Mar 8), adds the shutdown days and moves the order date earlier. Switch it off if your supplier stays open.

Order capital & net profitLanded cost (factory + freight) and 2026 Amazon fees per unit - referral by category with its minimum, FBA + 3.5% fuel surcharge and the holiday peak fee - so you see the cash each order needs and what it should earn.

Q4 demand surgeAdds 30% to the order quantity when your stock would run out between September and December.

Aged-inventory checkKeeps the minimum order for slow sellers to about 180 days of stock and flags any order that buys more - Amazon's aged-inventory surcharge starts at 181 days.

Low-Inventory-Level fee thresholdFlags ASINs under a 35-day buffer or already below Amazon's 28-day LIVE-fee line (per FNSKU) and estimates the monthly fee.

Supplier MOQRaises the order to your supplier's minimum order quantity when the plan comes in below it.

Why not paste this into ChatGPT?

Same report, same plan. Every date, quantity and dollar figure comes from fixed formulas that run in your browser. Upload the same report twice and you get the same numbers, for up to 500 ASINs per run.
Amazon's 2026 rules are built in and dated. The 28-day Low-Inventory-Level line (both 30- and 90-day supply, per FNSKU) with a 35-day buffer, the 3.5% fuel surcharge, the holiday peak window (Oct 15, 2026 - Jan 14, 2027), the aged-inventory surcharge from day 181 (top tier from day 456) and the referral fee schedule with its minimums. Rules checked Oct 5, 2026.
Every row is accounted for. The upload receipt shows rows read, rows skipped for zero sales, duplicate rows merged and B2B columns ignored, with exact unit and sales totals.
An Excel file with live formulas. Change a yellow cell and the reorder date, order quantity and profit recalculate.
It remembers your last plan. The next run asks which POs you placed, counts them as on order, and shows what changed since last time.

Honest note: a chat assistant can do this math if you give it every threshold, lead time and fee and keep them current. It does not keep a dated record of each plan and your open POs unless you paste them back in every time.

Pricing

$29 one-time. Up to 50 runs.

$29 · one-time

Reorder plan for your whole catalog

Reorder date for every ASIN
Order quantity with an aged-inventory check
Order capital, net profit and margin per ASIN
Chinese New Year, Q4 and LIVE-fee checks built in
PDF + Excel export, up to 50 runs

Plan my restocks - $29

L-Guard Restock Planner

$29 one-time

Pay once. Re-run up to 50 times with fresh sales data.

Cost over 12 months: $29. Re-run quarterly or before every PO.

Subscription inventory tools

$79+/mo

Subscription. You pay monthly even if you reorder once per quarter.

Cost over 12 months: $948 or more.

FAQ

Common questions

How is this different from a spreadsheet?

A basic spreadsheet only divides stock by sales. Restock Planner also checks supplier lead time, Chinese New Year shutdowns, Q4 demand and Amazon's Low-Inventory-Level fee 28-day line, and exports the plan to an Excel file with live formulas.

What data do I need?

Your Business Report CSV (Detail Page Sales and Traffic by Child Item), current FBA stock per ASIN and your supplier lead time. Add sale price, unit cost and freight to also see profit per unit.

Do I need to connect my Amazon account?

No. You only upload one CSV - the Business Report from Seller Central. No API connection, no credentials needed.

How accurate is the forecast?

Accuracy depends on how steady your sales are. RP uses your average daily sales over the report period, so products with steady demand get the most reliable dates. For new products or sudden spikes, treat the dates as a starting point and re-run with fresh data. If an item was out of stock or lost the Featured Offer during the report period, its sales rate is understated: the planner warns when the report shows a Featured Offer (Buy Box) percentage under 90% or when On hand is 0.

How often should I re-run it?

Quarterly is the sweet spot. Re-run before each major restock decision. You can also re-run if you launch a new product, change supplier, or notice a sales-velocity shift. Every plan is saved to your dashboard. The next run lists the POs your last plan asked for, lets you tick the ones you placed so they count as on order, and shows what changed since that plan.

How is this different from subscription tools like SoStocked?

Subscription inventory tools such as SoStocked cost $79+ a month - you pay every month even if you only reorder twice a year. L-Guard charges $29 once and you re-run it when you need a new plan (up to 50 runs). RP also flags Amazon's Low-Inventory-Level fee and Chinese New Year shutdowns and shows the profit of each order.

Does it work for new sellers with limited sales history?

It works best when the report covers at least 30 days of steady sales. For brand-new products the velocity - and therefore the dates - will be less reliable, so re-run once you have more sales history.

Your plan

Upload sales + enter supplier details

Every date, quantity, dollar figure and sentence in your plan comes from fixed formulas that run in your browser: the same report gives the same plan. Amazon rules checked Oct 5, 2026.

Where to get the report: Seller Central → Reports → Business Reports → Detail Page Sales and Traffic by Child Item. Any date range works (30 or 90 days recommended) - enter how many days it covers below. Download CSV.

Sales report (CSV) No file selected

Report covers (days) The date range you picked in Business Reports. Velocity = units ordered ÷ these days.

Planning defaults

These apply to every ASIN unless you set a per-ASIN override below the table.

Supplier lead time (days)

Production + sea/air transit

FBA inbound (days)

Check-in & distribution

Safety stock (days)

Buffer against demand spikes

Target cover (days)

Days of stock each order buys

My supplier closes for Chinese New Year (L-Guard assumes Jan 18 - Mar 8 and counts the whole supplier lead time as factory time; ask your supplier for exact dates)

Amazon fee assumptions (2026) — used to compute your net profit per unit

Referral category

Amazon's 2026 schedule, incl. price tiers and the $0.30 minimum. Override per ASIN below the table.

FBA fulfillment ($/unit)

Enter the base fee — the tool adds +3.5% fuel on top. The fee Amazon shows in Manage Inventory already includes it, so divide that number by 1.035 first (e.g. 4.28 → enter 4.14).

Inbound placement ($/unit)

$0 (optimized split) – $1.90/unit (minimal split, standard size; bulky up to $6.50)

Storage ($/unit/mo)

$0.56–$2.40/cu ft. Used when an ASIN has no unit volume.

Size class (for unit volume)

With a unit volume (cu ft) per ASIN, storage uses Amazon's monthly rates.

Defaults match the L-Guard 2026 fee schedule. Amazon's Low-Inventory-Level (LIVE) fee is ≈ $0.32–$1.11/unit for standard size (up to $2.09 bulky), higher the further you are below 28 days. It is charged only when both your 30- and 90-day historical days of supply are under 28 (per FNSKU); items selling under 20 units a week are exempt. The planner flags any ASIN under a 35-day buffer or already in the fee zone. Set Safety stock to 28+ days if you want each shipment to land before you cross the 28-day line. From Oct 15, 2026 to Jan 14, 2027 Amazon adds a holiday peak fulfillment fee (about +$0.32/unit on average, plus the 3.5% fuel surcharge): the planner adds it for the units each batch sells in that window (estimate). Storage with a unit volume: $0.78/cu ft Jan–Sep and $2.40/cu ft Oct–Dec for standard size ($0.56 / $1.40 oversize). Confirm exact numbers in your Seller Central Fee Preview.

Stop guessing when to reorder.

Upload your sales report. Get your reorder plan in about a minute.