FD Rates Sri Lanka: August 2026 Update — What Our Tracked Data Actually Shows

This month's update is different from our previous ones. Rather than describing the rate environment in general terms, we can now measure it. We have kept a dated record of every rate change we have observed since March 28, 2026 — 30 snapshots across 9 banks — so the figures below are what actually happened, not an impression of it.

The headline: rates are up, and the gap is widening

The average 12-month fixed deposit rate across the banks we track rose from 7.64% in Mar 2026 to 8.67% now — a gain of 1.03 percentage points. The best available 12-month rate moved further still, from 8.5% to 10.5%.

That difference between the average and the best is the part worth paying attention to. The top of the market is pulling away from the middle, which means the penalty for not comparing banks is larger now than it was in Mar 2026.

Where the best rates sit in August 2026

The leading 12-month rate we currently track is 10.5% from Seylan Bank. Across other tenures, the market average now stands at 8.36% for six months and 8.94% for 24 months. Notably, the six-month average has risen 1 points over the tracked window against 0.55 points for the 24-month — the shorter tenures have been catching up.

For savers, that undercuts the usual assumption that a long lock-in is required for a competitive rate. It is worth checking the 12-month rate against the 24-month before committing to the longer option — our FD calculator will show the actual maturity difference on your own deposit amount.

Who moved and who did not

Seylan Bank was the most aggressive mover in our records, lifting its 12-month rate from 8% to 10.5% — a rise of 2.5 percentage points. Private commercial banks led the increases broadly.

The state banks were far more restrained. Bank of Ceylon and National Savings Bank each moved their 12-month rate by half a point over the entire period, leaving them well behind the market leaders. That is the familiar trade-off in Sri Lankan deposits: a state institution does not need to bid as hard for your money, because the implicit or statutory guarantee does some of the persuading. A further 3 banks in our data left their 12-month rate completely unchanged across all 30 snapshots.

You can see the full bank-by-bank breakdown, including charts of how each rate moved, on our FD rate history page.

What this means if you have a deposit maturing

The most common costly mistake in a rising-rate period is the automatic rollover. If your deposit was opened in Mar 2026 and renews at your existing bank's current rate without you checking the market, you may be accepting a rate well below what is now available elsewhere. On a one-million-rupee deposit, the gap between the market average and the best available rate is worth roughly LKR 18,300 in gross interest over a year.

That said, the highest number is not automatically the right choice. A rate advantage from a smaller private bank is compensation for taking on more credit risk, and savers who lived through the finance company failures of the past decade are right to weigh that. Our investment safety guide covers how to think about that trade-off, and laddering remains the standard approach for savers who do not want to bet on which direction rates go next.

An honest note on what we can and cannot tell you

Our record begins in Mar 2026, so it describes recent movement rather than a full rate cycle. We capture a change at our next reading rather than on the exact day a bank makes it, and we track published standard rates rather than negotiated or promotional offers, which can be higher for large deposits. None of this is a forecast — we are reporting what we measured, and we have no particular insight into what the Central Bank does next.

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