What it means
A ledger is simply a record of who owns what and who owes what. Traditionally each organisation keeps its own ledger, and they spend time and money reconciling the differences between them.
A distributed ledger replaces this with a single shared record that is updated by all participants together. The key feature is that the entries are agreed by the network and not by a central authority.
When a new transaction is proposed, the participants check it against the rules, and once agreed it is added to the record in a way that makes it very difficult to alter later. Cryptography, which uses mathematical techniques to secure data, helps protect the entries.
Businesses are exploring DLT for tasks where several parties need to trust the same data, such as trade finance, securities settlement, supply chain tracking and cross-border payments. The attraction is faster settlement, fewer reconciliations and a clear audit trail.
The ledgers can be public, open to anyone, or private, restricted to approved members. For finance teams, the value lies in cost, speed and control, while the concerns include cost of implementation, legal clarity and data privacy.
A ledger that cannot be changed is helpful for audit, but it also makes mistakes harder to correct. Regulators in many countries are still developing the rules on how the technology should be used.
A nuance is that DLT and blockchain are not identical. Blockchain organises data in a chain of blocks, while other designs use different structures, and not every use case needs the technology at all.
A conventional shared database is often simpler when one trusted party already controls the data. Governance deserves attention before any project begins.
Participants must agree who may join, who can approve entries, how disputes are settled and what happens when the rules need to change. Many projects stall on these questions rather than on the technology itself.
In practice
Real-world examples.
Example
A group of banks sets up a private distributed ledger to settle trades in bonds. Each bank sees the same record at the same moment, so there is no need to reconcile separate databases. Settlement that took two days is completed in minutes, which frees up cash and reduces risk.
Example
A food company tracks produce from farm to supermarket on a shared ledger. Growers, shippers and retailers each add entries as the goods move. When a quality problem appears, the company traces the affected batch within hours instead of days, limiting the recall.
Example
A trade finance platform records letters of credit on a distributed ledger. The exporter, importer and banks all see the status of each document. Paperwork that used to take days to move between parties is verified automatically, and disputes are easier to resolve.
Case study
Seen in the real world.
Meridian Freight Alliance is an illustrative, fictional group of six shipping and logistics companies that spent heavily on reconciling invoices between one another. Each month the finance teams checked about 12,000 invoices, and around 6% had mismatches that took an average of two hours to resolve.
The alliance built a shared distributed ledger so that each shipment and charge was entered once and visible to all. Mismatches fell to 1%, which meant 120 disputed invoices instead of 720, saving 600 x 2 = 1,200 staff hours a month, worth about $36,000 at $30 per hour.
The system cost $400,000 to build and $8,000 a month to run, so the net monthly saving was $28,000 and the build cost was recovered in about 14 months. The alliance also gained a cleaner audit trail, because every entry carried a timestamp and the name of the party that made it. The illustrative lesson is that DLT pays off where several parties currently keep duplicate records, and not simply because it is new.
Watch out
Common mistakes.
- Assuming DLT and blockchain are the same, when blockchain is only one type of distributed ledger.
- Using the technology where a normal database would do, which adds cost and complexity without benefit.
- Believing that data on a ledger is automatically correct, when entries are only as accurate as the information put in.
Questions
People also ask.
What is the difference between a public and a private ledger?
A public ledger is open to anyone to join and read, while a private ledger is restricted to approved participants who are known to each other.
Why is DLT considered secure?
Entries are copied across many participants and protected with cryptography, so altering a record would require changing most copies at the same time.
Is DLT only for cryptocurrencies?
No. Cryptocurrencies were the first widely known use, but businesses also use it for settlement, record keeping and tracking assets, and some central banks are testing it for digital currencies.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%