Notice: For general interest only; may contain inaccuracies. Not a diagnosis, treatment, prognosis, or professional, clinical, or legal advice. Reading this creates no counsellor-client relationship. By reading this page, you agree to these terms. Full disclaimer. In an emergency, call 911.
Why Does My Partner Lie About Small Things?
You found out your partner lied about how much they spent at the grocery store. Or they said they were at the gym when they were sitting in a parking lot scrolling their phone. The lie itself barely matters — it is the fact that they lied that keeps circling in your head. If they will lie about something this trivial, what else are they hiding?
You are not overreacting. Research in relationship psychology shows that small, repeated lies erode trust just as effectively as a single dramatic betrayal — sometimes more so, because they are harder to name and easier for the lying partner to dismiss. Understanding why your partner lies about things that “don’t even matter” is the first step toward deciding what to do about it.
The Science of Everyday Lying in Relationships
Psychologist Bella DePaulo’s landmark research at the University of Virginia found that people in close relationships lie in roughly one out of every ten interactions — less often than with strangers or casual acquaintances, but with higher emotional stakes when discovered (DePaulo & Kashy, 1998, Journal of Personality and Social Psychology, 74(1), 63–79). The lies most commonly told to romantic partners fall into two broad categories: lies meant to protect the liar (“I didn’t spend that much”) and lies meant to protect the partner’s feelings (“Your cooking was great tonight”). Both categories share a common root — the liar perceives honesty as more threatening than deception in that moment.
A 2010 study by Serota, Levine, and Boster in Human Communication Research revealed that the distribution of lying is not even. A small number of people — roughly 5 percent of participants — accounted for over half of all reported lies. Most people are relatively honest most of the time. If your partner is lying frequently, even about small things, it is statistically unusual and worth paying attention to.
Three Types of Romantic Deceivers
A 2026 study by Cole and Stonebrook published in the Journal of Social and Personal Relationships identified three distinct profiles of deception in romantic partnerships:
Transparent Partners (38% of the sample) rarely lie and generally experience high relationship satisfaction. Their occasional deception tends to be minor and partner-protective — the kind of white lie that most people consider harmless.
Strategic Soothers (48%) lie primarily to keep the peace. They avoid conflict, suppress their own needs, and tell their partner what they think their partner wants to hear. Their lies are not malicious, but they are chronic — and they prevent the couple from ever addressing the real tensions underneath.
Antagonistic Strategists (14%) deceive across motives — to gain advantage, to avoid accountability, and sometimes simply out of habit. Their lying is part of a broader relational pattern that may include manipulation, stonewalling, or emotional control.
If your partner lies about small things to avoid your reaction, they most likely fit the Strategic Soother profile. This is important because it means the lying is not about you being untrustworthy with the truth — it is about your partner having learned, usually long before they met you, that honesty leads to punishment.
Where the Pattern Starts: Childhood and Protective Parts
Internal Family Systems (IFS) therapy, developed by Richard Schwartz (Schwartz & Sweezy, 2020), offers a useful framework for understanding chronic low-level dishonesty. In IFS terms, lying is not a character flaw — it is a protective strategy managed by a part of the person’s internal system.
Consider a child who grew up in a household where expressing a need — “I’m hungry,” “I’m scared,” “I need help” — was met with anger, dismissal, or punishment. That child’s system develops a manager part whose job is to prevent vulnerability from being exposed. Lying becomes a tool: “I’m fine,” “I already ate,” “Nothing happened at school.” The part learns that deception keeps the system safe.
Fast-forward twenty or thirty years. That child is now your partner. The manager part that learned lying as a survival strategy is still running the same program — even though the environment has changed, even though you are not the parent who punished honesty. The part does not know the war is over. It keeps lying because that is the only strategy it has ever had for staying safe in a close relationship.
This does not excuse the lying. It explains it — and the explanation matters because it points toward a path of healing that character-shaming cannot reach.
How Small Lies Destroy Trust: Gottman’s Sliding Door Moments
Dr. John Gottman’s research at the University of Washington demonstrates that trust in a relationship is not built or broken in one dramatic moment. It rises or falls through hundreds of everyday micro-moments that Gottman calls “sliding door” moments — named after the 1998 film in which a woman’s life diverges based on whether she catches a train.
In a sliding door moment, one partner makes a bid for connection — sharing a feeling, asking a question, reaching for the other person’s hand — and the other partner either turns toward that bid or turns away. Every time your partner lies about something small instead of telling the truth, they are turning away. Every lie, however minor, registers in your nervous system as a small betrayal. Your body keeps score even when your conscious mind is trying to let it go.
Over time, the accumulation of these micro-betrayals produces what Gottman calls “negative sentiment override” — a state in which even neutral or positive actions by the lying partner are interpreted through a lens of suspicion. You start reading hidden motives into everything they say. You check their phone. You stop believing their compliments. The problem is no longer the lies themselves but the perceptual filter they have created: you can no longer hear your partner clearly because the signal has been corrupted by too much noise.
What Healing Looks Like
Gottman’s Trust Revival Method, outlined in What Makes Love Last? (2012), provides a structured path through this kind of erosion. The process moves through three phases:
Atone: The lying partner must acknowledge the impact of their deception without minimizing it. “I know my lying has made you feel unsafe” is a beginning. “It was just a small thing, I don’t see why you’re so upset” is the end of the conversation.
Attune: The couple rebuilds emotional connection through Gottman’s ATTUNE framework — Awareness of the partner’s emotion, Turning toward, Tolerance of two different viewpoints, Understanding, Non-defensiveness, and Empathy. This is the daily practice that replaces lying with transparent communication.
Attach: The couple creates new rituals of trust and connection — regular check-ins, shared goals, physical closeness — that gradually overwrite the old patterns.
When I work with couples dealing with chronic dishonesty, I combine Gottman’s structured trust repair with IFS to help the lying partner get to know the protective part that learned to lie. That part needs to be heard and understood before it can step back and allow a new strategy — honesty — to take its place. Meanwhile, the hurt partner’s own protective parts — the hypervigilant detective, the angry interrogator, the part that wants to withdraw entirely — also need compassionate attention. Both partners are carrying parts that are working overtime to keep them safe, and both sets of parts are inadvertently making the relationship less safe.
When to Seek Help
Not every small lie is a crisis. But if you recognize a pattern — if your partner lies reflexively, if you have stopped trusting their account of ordinary events, if you find yourself checking up on things they tell you — then the trust system in your relationship is compromised. The longer the pattern continues without intervention, the harder it becomes to reverse, because each new lie reinforces the neural pathways of suspicion in the betrayed partner and the neural pathways of avoidance in the lying partner.
Couples counselling is most effective when sought early, before both partners have retreated into entrenched protective positions. If you are noticing the pattern now, now is the right time.
How Samuel Can Help
At Dr Samuel Counselling & Neurofeedback in Vancouver, I work with couples navigating trust erosion from chronic dishonesty. Using the Gottman Trust Revival Method and Internal Family Systems therapy, I help both partners understand the protective logic behind the lying, repair the damage it has caused, and build transparent communication skills that make honesty feel safer than deception.
Fees may be covered by ICBC, CVAP, FNHA, IFHP, RCMP, VAC and most other insurers, depending on eligibility, and direct billing is available so you do not have to submit the claim yourself.
If your partner’s small lies have become a big problem, book a session or call 604-721-0604 to start the conversation about rebuilding trust.
References
- Cole, T., & Stonebrook, A. L. (2026). Types of romantic deceivers: A latent profile analysis. Journal of Social and Personal Relationships. https://doi.org/10.1177/02654075261456365
- DePaulo, B. M., & Kashy, D. A. (1998). Everyday lies in close and casual relationships. Journal of Personality and Social Psychology, 74(1), 63–79.
- Gottman, J. M., & Silver, N. (2012). What Makes Love Last? How to Build Trust and Avoid Betrayal. Simon & Schuster.
- Schwartz, R. C., & Sweezy, M. (2020). Internal Family Systems Therapy (2nd ed.). Guilford Press.
- Serota, K. B., Levine, T. R., & Boster, F. J. (2010). The prevalence of lying in America: Three studies of self-reported lies. Human Communication Research, 36(1), 2–25.
Disclaimer: This article is for educational and informational purposes only and does not constitute professional advice, diagnosis, or treatment. Consult a qualified professional for any mental-health decisions.
Written with expert editorial assistance.
