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What does your accepted variance cost each month?

Enter your monthly volume, price and the variance you treat as normal. You get the rand figure in about two minutes.

Price your variance
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Isonke

28-day stock reconciliation for wholesale diesel depots

How much of the diesel moving through your depot can you account for?

We reconcile one month of your depot's records for you, checking every litre against what you paid for, what arrived and what the records can support. Our software does the matching. You get the findings.

Book a 30-minute callOr price your variance →

Find out if your records can support the reconciliation, and what to send.

Exception 6 of 29 openRequires investigation

Paid vs BOL mismatch

Demo Interior Bulk Petroleum · Tank 06 · Diesel 500ppm · 15 Aug 2026

  1. Paid for40,000 LOne 40,000 L load
  2. Bill of lading39,167 L833 L less than you paid for
  3. Metered into Tank 0639,127 L40 L off the bill of lading (0.10%). Within tolerance.
Short on what you paid forR20,642833 L to claim back: added to the next load or deducted from the next payment. Suppliers rarely fix it unless someone reconciles and follows up.
Seeded synthetic data from the working demo. Illustrative values, not a real depot.

The control gap

You know today's stock number. Can you show how you got there?

A load lands short. The driver blames the meter. The probe tells a different story.

By month-end nobody can prove who is right. The next supplier invoice is already paid.

The evidence exists. It sits in WhatsApp groups and a spreadsheet. It sits in a paper logbook and a gate slip security never filed.

One 40,000-litre load · three recordsUnresolved
  1. Bill of ladingWhat the supplier dispatched40,000 L
  2. Delivery meterWhat the driver says arrived40,000 L
  3. Tank probeWhat the tank holds after offload39,600 L−400 L
Illustrative example. Not an actual depot record.
If your depot accepts 1% variance as normal, a 40,000-litre load can write off
400litres
before anyone asks a question.That is about R13,100 at the October 2026 Gauteng Zone 9C wholesale list price for 50ppm diesel (R32.80 a litre). Illustrative only; grade, zone and commercial terms affect the actual value.That's one load. Work out what your accepted variance costs each month →

See it working

Click through a month of depot records.

The software behind the reconciliation, running on seeded synthetic data. Open an exception and follow it back to the records behind it.

Working demoSeeded synthetic data · illustrative values
Open the complete working demo

Stock on Hand

Position by product and tank

Total depot stock
255,234 L
R 5,978,191
Illustrative value, each product priced at its own demo reference rate.
Diesel 50ppm
Running low
135,737 L
R 3,415,143
4.4 days of cover · Running low
Diesel 500ppm
Running low
60,782 L
R 1,506,178
3.9 days of cover · Running low
Illuminating Paraffin
Too much stock
58,715 L
R 1,056,870
42.0 days of cover · Too much stock
Diesel 50ppm
3 tanks · 48% of 284,000 L capacity
Running low
135,737L
R 3,415,143
illustrative value at demo reference rate
Avg daily usage (30d)
31,032 L
Days of cover
4.4
Worst-case lead time
7 days
Reorder point
217,226 L
Net change (90d)
-46,803 L

Cover is below the 7-day lead time of Demo Cross-Border Energy Supply, the slowest supplier on record.

Diesel 500ppm
3 tanks · 34% of 179,000 L capacity
Running low
60,782L
R 1,506,178
illustrative value at demo reference rate
Avg daily usage (30d)
15,753 L
Days of cover
3.9
Worst-case lead time
5 days
Reorder point
78,764 L
Net change (90d)
-50,318 L

Cover is below the 5-day lead time of Demo Interior Bulk Petroleum, the slowest supplier on record.

Illuminating Paraffin
2 tanks · 53% of 110,000 L capacity
Too much stock
58,715L
R 1,056,870
illustrative value at demo reference rate
Avg daily usage (30d)
1,399 L
Days of cover
42.0
Worst-case lead time
7 days
Reorder point
9,790 L
Net change (90d)
-10,285 L

Cover runs to 42 days against a 7-day lead time, so stock arrives faster than the depot draws it down.

Tank positionsBalance replayed from signed movements
TK-01Diesel 50ppm
43,170L
45% fullcap 95,000 L
opened at60,800 L
TK-02Diesel 50ppm
46,446L
53% fullcap 88,000 L
opened at51,040 L
TK-03Diesel 50ppm
46,121L
46% fullcap 101,000 L
opened at70,700 L
TK-04Diesel 500ppm
24,789L
41% fullcap 60,000 L
opened at37,200 L
TK-05Diesel 500ppm
13,124L
24% fullcap 54,000 L
opened at29,700 L
TK-06Diesel 500ppm
22,869L
35% fullcap 65,000 L
opened at44,200 L
TK-07Illuminating Paraffin
44,127L
74% fullcap 60,000 L
opened at36,000 L
TK-08Illuminating Paraffin
14,588L
29% fullcap 50,000 L
opened at33,000 L
Synthetic sample data. Not an actual depot record.

How it works

Every litre leaves a record you can replay.

Everyone works from one set of records. Each exception links to the document behind it.

Click through the working demo →It runs on synthetic data, so you see how it works without seeing another depot's numbers.

  1. Incoming loads, checked three ways.

    What you paid for. What the bill of lading says. What metered in. A short delivery flags before you pay for the next order.

    Paid 40,000 LBOL 39,167 LReceived 39,127 LGap −833 L

  2. Customer loads, from order to drop.

    Ordered, loaded and delivered sit side by side. A shortfall becomes a traceable record instead of another phone call.

    Ordered 10,900 LLoaded 10,900 LDelivered 10,628 LShort −272 L

  3. Tank balances you can replay.

    Opening stock plus every signed movement equals the balance. One number. No second spreadsheet to argue with.

    Tank 01 opening 60,800 L+ 183 signed movements= 43,170 L

  4. Exceptions, ranked in rands.

    The biggest exposure sits at the top. Open it and follow the trail: order, bill of lading, receipt, tank, balance.

    1. Reconciliation variance not closed out R67,7312. Reconciliation variance not closed out R61,9253. Probe or meter reading disagreement R42,546

  5. Patterns across loads.

    Variance per litre lines up by truck, supplier and shift. Five explainable incidents show up as one pattern.

    Truck DMO 404 GPDelivered short 2.07% of litres loadedacross 12 deliveries

Straight answers

Questions depot owners ask first.

“A discrepancy doesn't mean fuel was stolen.”

Correct. Isonke never labels a difference as theft or loss. It separates each amount into one of five buckets:

  • B1Potential supplier differences requiring investigation
  • B2Variance nobody has explained yet
  • B3Variance you accepted or wrote off
  • B4Amounts already confirmed as recovered
  • B5Gaps where evidence is missing, with no rand value attached

The software shows the evidence. Your people decide the cause.

“Our records are spread across paper, spreadsheets and WhatsApp.”

That is normal. We first check whether the agreed record pack can support the work. Cleaning and linking accepted records is part of the reconciliation.

“The demo uses fake data. What would it show with ours?”

The 28-Day Depot Stock Reconciliation answers that with your own records.

28-Day Depot Stock Reconciliation

Establish what one month of your records can actually prove.

After the call, you send the agreed record pack. Within two business days of receiving it, we confirm whether it can support the engagement. Once accepted, we reconstruct the month and separate what is measured from what remains unresolved.

You send

  1. One legal entity, one depot and one agreed calendar month
  2. Delivery notes, supplier invoices and bills of lading
  3. Tank logs, probe readings and stock movement records
  4. Spreadsheets, paper logs and relevant WhatsApp exports
  5. One operational contact for up to two clarification rounds

You get

  • Source-linked opening-to-closing stock reconstruction
  • Evidence-completeness assessment
  • Exceptions ranked by estimated rand significance
  • Every amount sorted into the five buckets above
  • Potential supplier differences separated from other variance
  • Management findings pack, working files and priority control plan
  • Thirty-day action review

Who does the work

Reconciled by people who have worked the problem.

Ntandoyenkosi Mpofu and Cleymand Mgiba, Isonke's co-founders
Ntandoyenkosi Mpofu and Cleymand Mgiba run Isonke together.

Ntandoyenkosi leads the reconciliation.

Before co-founding Isonke, Ntandoyenkosi spent three years as a Logistics Coordinator at a Johannesburg wholesale diesel supplier. Her work included reconciling orders, bills of lading, receiving meters, probe readings, tank logs and delivery records; investigating material differences; and preparing evidence for supplier shortage claims.

That work taught her that you can calculate a variance before you can prove its cause. The reconciliation is built around that difference.

Cleymand leads the software.

He built the system Isonke uses to match orders, bills of lading, receipts and tank balances. Before Isonke, he handled bargaining council compliance for franchise-owned Shell and BP fuel stations, so he knows how forecourt records hold up when someone checks them.

You speak with both of them on the call. The service is the product. Isonke's software does the matching. You get your findings whether or not you ever use it again.

Put R45,000 next to

The variance you already accept
At 1%, your tolerance lets up to R13,100 go unquestioned on every 40,000-litre load. About three and a half of those loads equal this fee. Count the loads that land at your depot this month.
Fuel: October 2026 Zone 9C 50ppm wholesale price.

FAQ

Before you send the records.

What happens to the records we send you?

We sign an NDA before you send anything. We use the records only for your reconciliation and its thirty-day review, and handle them under POPIA. We keep them only as long as the work needs them, normally 12 months, and longer only where POPIA allows it, such as a legal requirement or your consent. Then we delete them. Ask us to delete them sooner and we will. The findings pack and working files are yours to keep.

Do we need to replace our current software?

No. The reconciliation runs on an agreed extract of the records you already produce. Software is an optional next step only after the evidence supports it.

Do you need access to our live systems?

No. We work from an agreed extract of one month's records.

What if some records are incomplete?

We check the agreed record pack before the engagement starts. We label missing evidence as unsupported and never turn it into a loss or recovery figure.

Will this interrupt depot operations?

We work from the records you supply, with one operational contact and up to two clarification rounds. Your existing systems keep running.

Is the calculator an audit?

No. It prices the variance threshold you enter. It does not measure a loss or establish what your records can prove.

What happens after the reconciliation?

The report and working files are yours. Thirty days later, we review the actions taken. If you want software or a longer engagement, we scope it separately, based on what the month showed.

Your records, source-linked

Stop estimating the gap. Measure it.

R45,000 for one depot and one agreed month, reconciled in 28 days. We take five depots a month.

Book a 30-minute callOr price your accepted variance →

You speak with Ntandoyenkosi and Cleymand, Isonke's co-founders.