Every earnings call for every tanker company will mention spot rates and time charter rates within the first five minutes. These two terms describe the two ways a tanker company gets paid, and understanding the difference is essential for making sense of any tanker stock’s results, dividend, or valuation.
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Here is the plain English explanation.
The Simple Version First
A spot rate is a price agreed right now for one voyage. A time charter rate is a price agreed right now for a set period, like six months or a year, regardless of what happens to spot rates in between.
That is the whole thing. Everything else is just understanding the implications.
What Is the Spot Market?
When a tanker company puts a vessel on the spot market, it is available for hire voyage by voyage at whatever the current market rate happens to be.
Think of it like a taxi. You hail a cab, you agree on a fare for that specific trip, and when the trip ends the meter resets. The next passenger pays whatever the going rate is at that moment. If taxi demand is high because of rain or a big event, fares go up. If it is a quiet Tuesday afternoon, fares are lower.
In the tanker world, a spot charter typically covers one voyage from a loading port to a discharge port. The rate is expressed as a daily equivalent, so you can compare it to time charter rates, but it is technically agreed for a single voyage.
Spot rates move every single day. They respond instantly to changes in supply and demand: geopolitical shocks, seasonal demand patterns, port congestion, new sanctions, canal disruptions. When the Strait of Hormuz closed in early 2026, VLCC spot rates went from around $40,000 a day to a record $423,736 a day in a matter of weeks. That is what pure spot exposure looks like.
What Is a Time Charter?
A time charter is a lease agreement. The ship owner agrees to provide a vessel to a charterer for a fixed period of time at a fixed daily rate. That rate does not change no matter what happens to spot rates during the lease.
Think of it like renting a car for a month at a rate you locked in when you made the reservation. If gas prices spike and rental demand surges while you are driving around, your rate does not go up. You keep paying what you agreed to at the start. The rental company, on the other hand, cannot capture the higher prices from other customers who want that car.
In the tanker business, time charters might run for six months, one year, three years, or even longer. The charterer, usually an oil company or trading house, takes on the rate risk in exchange for certainty about having a vessel available. The ship owner gives up upside rate exposure in exchange for predictable cash flow.
Why Does This Mix Matter to Investors?
Here is where it gets directly relevant to reading tanker stocks.
A company that runs mostly on the spot market has massive earnings leverage to rate cycles. When rates spike, earnings explode. When rates fall, earnings collapse. The stock price moves violently because every rate change flows straight through to revenue. Frontline ($FRO) has historically maintained high spot exposure because management believes in capturing rate spikes rather than locking in lower fixed rates.
A company with more of its fleet on time charters has more predictable, stable earnings. When rates spike, they miss most of the upside because those vessels are locked into fixed contracts. But when rates crash, they keep earning the locked-in rate while spot competitors are bleeding. This protects the dividend floor but limits the ceiling.
Most tanker companies run a mix of both, and the balance of spot versus fixed coverage is a strategic decision that management discusses explicitly on every earnings call.
A Real Example of How This Plays Out
Imagine a tanker company with ten VLCCs. It has five on spot and five on one-year time charters at $50,000 per day.
Scenario one: rates spike to $150,000. The five spot vessels earn $150,000 a day each. The five time charter vessels still earn $50,000 a day each. Average earnings across the fleet: $100,000 per day per vessel. They captured half the upside.
Scenario two: rates crash to $15,000. The five spot vessels earn $15,000 a day each. The five time charter vessels still earn $50,000 a day each. Average earnings across the fleet: $32,500 per day per vessel. The fixed contracts saved them from a complete wipeout.
Now imagine a company that runs 100% spot. In scenario one it earns $150,000 per vessel per day. In scenario two it earns $15,000 per vessel per day, which for most operators is below the cash breakeven point. That is the risk of pure spot exposure.
How to Find This Information for Any Tanker Stock
Every publicly traded tanker company discloses its charter coverage in quarterly earnings reports. Look for a section called fleet utilization or charter coverage, which will typically show what percentage of vessel days for the current quarter and upcoming quarters are booked on fixed charters versus available for spot.
When a company says it has 60% coverage for the next quarter at an average rate of $45,000 per day, it means 60% of its available vessel days are locked in at $45,000 regardless of spot rates, and the remaining 40% will earn whatever spot rates are during that period.
This information is incredibly useful for estimating future earnings. If you know 60% of the fleet is earning $45,000 and you have a view on where spot rates will average for the quarter, you can build a rough earnings model without being a professional analyst.
The Vocabulary You Will Hear on Earnings Calls
A few terms come up constantly and are worth knowing.
TC rate or TC equivalent refers to the time charter equivalent rate, which is how tanker companies express spot voyage earnings as a daily rate after subtracting voyage costs like port fees and fuel. It allows apples-to-apples comparison between spot and time charter earnings.
Coverage or fixed coverage means the percentage of vessel days booked on time charters for a given period.
Rolling off means a time charter is expiring and the vessel is about to become available for the spot market again.
Locking in coverage means management is converting spot vessels to time charters, usually because they think spot rates have peaked or will fall.
The Bottom Line
Spot exposure equals volatility and upside. Time charter coverage equals stability and protection. The optimal mix depends on where you think rates are going and how much earnings variability you want.
When you read any tanker company’s earnings report and see a table showing their charter coverage, you now know exactly what it means and why it matters for their upcoming dividend.
I cover the specific coverage profiles of the tanker stocks I follow at TxZen in the Tanker Stocks section, and the SteamGauge weekly dashboard tracks current rate trends so you always know which way the spot market is moving.
Not financial advice. Do your own research. I am an investor sharing my own framework for following this market.
Want to stay on top of the tanker market? Follow TxZen for weekly signal updates, stock-specific analysis, and the SteamGauge dashboard.
For a live example of how this plays out, current VLCC spot rates show where the TD3C benchmark sits today. Frontline locked in a $76,900 per day time charter before the Hormuz crisis started. That is exactly the kind of charter versus spot tradeoff this guide describes.