Two different questions, two different answers
- Gluten is not a concern? Regular shoyu, 1:1 — nearly identical, stop reading here
- Need gluten-free + soy is OK? Coconut aminos + pinch of salt (add ½ tsp salt per tbsp)
- Need gluten-free AND soy-free? Coconut aminos is the only viable option
- Dipping sushi, gluten-free? Coconut aminos + few drops rice vinegar
If Gluten Is Not a Concern (Case A)
Many recipes written for Western audiences call for tamari when they really mean soy sauce. If your only issue is that the recipe says “tamari” and you have regular soy sauce, swap 1:1 and move on.
1. Regular Shoyu (Koikuchi) — Closest Substitute
Ratio: 1:1 substitution.
Koikuchi shoyu is brewed from soybeans and wheat in roughly equal proportion. The wheat fermentation adds a brighter, slightly sharper finish that tamari lacks. In cooking applications — stir-fries, marinades, soups, glazes — this difference is undetectable. In dipping (sashimi, sushi), some people prefer tamari's rounder body, but regular shoyu is completely acceptable.
2. Dark Soy Sauce (Chinese) — For Braised Dishes
Ratio: 1:1, but expect a darker color and slightly sweeter taste.
Chinese dark soy sauce (lao chou) is thicker, sweeter, and darker than tamari. It provides rich color and body in braised dishes and dark marinades. The flavor profile is further from tamari than regular shoyu is, so use this only when color and richness matter more than precision.
If You Need Gluten-Free (Case B)
For celiac disease or wheat sensitivity, the substitutes narrow to products that contain no wheat whatsoever. Cross-contamination is a real concern — verify certification on every product.
3. Coconut Aminos — Best Gluten-Free Option
Ratio: 1:1 by volume, plus ½ tsp salt per tablespoon (coconut aminos are 65% lower in sodium than tamari).
Coconut aminos are fermented from coconut sap and salt. They are both gluten-free and soy-free. The flavor is milder, sweeter, and less complex than tamari — think of it as tamari with the volume turned down and a hint of caramel sweetness added. The extra salt compensates for the lower sodium content.
For dipping sushi or sashimi: add a few drops of rice vinegar to coconut aminos to sharpen the profile. For cooking, the sweetness often works in your favor — it acts similarly to a small addition of mirin.
4. Bragg Liquid Aminos — Soy-Based, Gluten-Free
Ratio: 1:1 substitution.
Made from non-fermented hydrolyzed soy protein, Bragg Liquid Aminos is gluten-free but contains soy. The flavor is cleaner and simpler than tamari — salty and savory without the fermented depth. It works well in cooked applications where tamari is one seasoning among many. For dipping or recipes where tamari flavor is front and center, the lack of fermented complexity is noticeable.
5. Fish Sauce — Last Resort, Strong Flavor
Ratio: ½ tsp fish sauce per 1 tbsp tamari. Dilute with water to adjust.
Fish sauce provides intense umami and is naturally gluten-free, but the flavor is pungent, marine, and completely different from tamari. Use it only in cooked dishes with strong competing flavors — curries, heavily-spiced stir-fries, marinades with garlic and ginger. Never for dipping. This is a flavor-delivery mechanism, not a flavor match.
Which Substitute for Which Application
| Use | Best substitute | Gluten-free? |
|---|---|---|
| Dipping sauce | Coconut aminos + salt | Yes |
| Marinade | Regular shoyu | No |
| Gluten-free sushi dip | Coconut aminos + rice vinegar | Yes |
| Stir-fry seasoning | Regular shoyu | No |
| Glazing (teriyaki) | Coconut aminos | Yes |
When to Buy the Real Thing
A 592ml bottle of San-J Tamari (certified gluten-free) costs $5–8 and lasts months. If you need gluten-free soy seasoning for any reason — celiac, wheat sensitivity, or simply preference — tamari is worth stocking permanently. It works in every application where soy sauce is used and provides a richer, rounder flavor than any substitute.
Shop San-J Tamari (certified GF) on Amazon →
Frequently asked questions
Is tamari actually gluten-free?
Most tamari is gluten-free, but not all. Traditional tamari is a byproduct of miso fermentation and uses only soybeans — no wheat. However, some commercial brands add a small percentage of wheat for flavor. Always check the label. Certified gluten-free brands include San-J (blue label) and Kikkoman Gluten-Free Tamari.
What is the difference between tamari and regular soy sauce?
Regular Japanese soy sauce (koikuchi shoyu) is brewed from roughly equal parts soybeans and wheat. Tamari is brewed from soybeans with little or no wheat. The result: tamari is richer, thicker, less sharp, and darker than regular soy sauce. The flavor is rounder and more purely savory, with less of the bright, slightly alcoholic top note that wheat fermentation adds to shoyu.
Can I use regular soy sauce if I am not celiac?
Absolutely. If gluten is not a concern, regular koikuchi shoyu is a 1:1 substitute for tamari in every recipe. The only detectable difference is a slightly thinner body and a brighter, sharper finish. Many recipes that call for tamari were written for a US audience where tamari is more commonly available than Japanese koikuchi shoyu.
Are coconut aminos worth the price as a tamari substitute?
Coconut aminos cost 3–5 times more than tamari per ounce. They are worth it only if you need both soy-free AND gluten-free. The flavor is milder, sweeter (about 2g sugar per tsp vs. 0g for tamari), and less complex. For someone avoiding soy protein due to allergy, coconut aminos are the best available option. For everyone else, tamari or regular soy sauce is better and cheaper.
Can I use Bragg Liquid Aminos instead of tamari?
Yes, at 1:1 ratio. Bragg Liquid Aminos is made from non-fermented hydrolyzed soy protein. It provides salt and amino acids (umami) but lacks the fermented depth, color complexity, and aromatic compounds that tamari develops during its 6–18 month brewing. It works for cooking applications; it is weaker for dipping where the flavor is exposed.
Does tamari work better than soy sauce for marinades?
Tamari’s higher concentration of free glutamic acid and lower wheat content gives it a slight edge in marinades. The thicker consistency clings better to protein surfaces, and the rounder flavor penetrates more evenly during long marinades (4+ hours). For quick marinades under 30 minutes, the difference between tamari and regular soy sauce is negligible.
What is the lowest-sodium tamari substitute?
Coconut aminos has about 90mg sodium per teaspoon versus tamari’s 290mg — roughly 70% less. If sodium reduction is the primary goal, coconut aminos is the best option. Add a small amount of MSG (¼ tsp per tbsp coconut aminos) to compensate for the lower umami intensity. This combination provides clean umami with significantly less sodium than any soy-based product.
Where to go next
- What Is Tamari — how tamari is made, types, and its role in Japanese cuisine
- Tamari vs Soy Sauce — detailed comparison of flavor, brewing, and uses
- What Is Shoyu — Japanese soy sauce varieties and regional styles
- How to Use Shoyu — cooking techniques for soy sauce in Japanese cuisine
- Soy Sauce Substitute — options for replacing soy sauce entirely
- Guides Hub — all ingredient and technique guides